hereafter , the present application will be further described in combination with embodiments . the embodiments are only a review for concept mentioned by the present application , but should not be interpreted as limitation for the present application . ( 1 ) preparation of 1 -( 4 - bromophenyl )- isoquinoline ( piqbr ) is as follows : 1 . 63 g ( 10 mmol ) of 1 - chloroisoquinoline and 2 . 00 g ( 10 mmol ) of 4 - bromophenylboronic acid are added into a 100 ml two - neck flask with 20 ml of toluene , and followed by being evacuated , being introduced nitrogen and being stirred to become homogenous . after this , 34 . 68 mg ( 0 . 03 mmol ) of tetrakis ( triphenylphosphine ) palladium ( pd ( pph 3 ) 4 ) as a catalyst and 5 ml of ethanol as a phase transfer agent are added , and followed by continuing to be evacuated , being introduced nitrogen and being stirred to become homogenous . and then 5 ml of 2 mol / l na 2 co 3 solution is added and reaction is conducted at 94 ° c . for 8 h . the resulting reaction solution is cooled to room temperature , washed with water and dried with anhydrous mgso 4 , and then toluene as an organic solvent is removed by rotary evaporation . the resulting crude product was purified by silica gel column chromatography ( with an eluent , dichloromethane / n - hexane ( 1 : 4 )). 2 . 21 g of 1 -( 4 - bromophenyl )- isoquinoline ( piqbr ) which is white needle - like crystals and of which yield is 78 % is obtained . 1 hnmr spectrum of the product is shown in fig1 . 1 hnmr ( 600 mhz , cdcl 3 ): δ ( ppm )= 8 . 61 ( d , j = 5 . 4 hz , 1h ), 7 . 98 ( d , j = 3 hz , 2h ), 7 . 74 - 7 . 53 ( m , 7h ). characteristic peaks are located between 7 and 9 , indicating that all of the hydrogen atoms ( h ) on piqbr are located on the benzene ring , and the total number of the hydrogen atoms ( h ) in the spectrum equals the total number of the hydrogen atoms ( h ) actually existing on piqbr . ( 2 ) preparation of tris ( 2 -( 4 - bromophenyl )- isoquinoline ) iridium ( ir ( piqbr ) 3 ) is as follows : ( a ) under nitrogen atmosphere , 317 mg ( 1 mmol ) of iridium trichloride and 622 mg ( 2 . 2 mmol ) of piqbr are dissolved into a mixture of 21 ml of 2 - ethoxyethanol and 7 ml of water , and followed by being stirred and meanwhile being slowly heated to 120 ° c ., and the reaction is conducted at 120 ° c . for 24 h . after cooling to room temperature , the reaction product is washed with water and is filtered , thereby getting a red precipitate being a crude product . and then the crude product is washed with ethanol , and is dried , thereby achieving cyclometalated iridium ( iii ) μ - chlorobridged dimer ( ir ( iii ) chloride bridge dimer ) being reddish - brown solid powers . ( b ) under nitrogen atmosphere , 316 mg ( 0 . 2 mmol ) of the cyclometalated iridium ( iii ) μ - chlorobridged dimer ( ir ( iii ) chloride bridge dimer ), 125 mg ( 0 . 44 mmol ) of piqbr and 44 mg ( 0 . 2 mmol ) of silver trifluoroacetate are dissolved in 16 ml of degassed glycerol , and then are stirred and meanwhile slowly heated to 165 ° c ., and the reaction is conducted at 165 ° c . for 24 h . a large amount of water is added to the solution after reaction to separate out red precipitate after cooling to room temperature , and then the red precipitate is filtered and dried . the resulting crude solid product is purified by silica gel column chromatography ( with an eluent , dichloromethane / petroleum ether ( 1 : 8 )), thereby obtaining 83 . 3 mg of tris ( 2 -( 4 - bromophenyl )- isoquinoline ) iridium complex ( ir ( piqbr ) 3 ) which is dark red solid powder and of which yield is 20 %. 1 h nmr spectrum of ir ( piqbr ) 3 is shown in fig2 . 1 hnmr ( 600 mhz , cdcl 3 ): δ ( ppm )= 8 . 87 ( dd , j 1 = 7 . 2 hz , j 2 = 3 hz , 3h ), 8 . 03 ( d , j = 8 . 4 hz , 3h ), 7 . 76 ( dd , j 1 = 5 . 4 hz , j 2 = 3 hz , 3h ), 7 . 70 - 7 . 67 ( m , 6h ), 7 . 29 ( d , j = 6 . 6 hz , 2h ), 7 . 15 ( d , j = 6 . 6 hz , 3h ), 7 . 13 ( dd , j 1 = 8 . 4 hz , j 2 = 2 . 4 hz , 3h ), 7 . 03 ( d , j = 1 . 8 hz , 3h ). it can be seen that the total number of the hydrogen atoms ( h ) in the spectrum equals the total number of the hydrogen atoms ( h ) in real molecule , and the coupling of characteristic peaks matches with the coupling splitting of the hydrogen atoms ( h ) on ir ( piqbr ) 3 . for elemental analysis of ir ( piqbr ) 3 , the result in theory is as follows : by percent (%), c , 51 . 89 ; h , 2 . 61 ; n , 4 . 03 ; the detecting result is as follows : by percent (%) c , 53 . 40 ; h , 2 . 95 ; n , 3 . 36 . tof - ms testing value is 1039 . 07 , and calculated value is 1041 . 64 . ( 3 ) preparation of pf - ir ( piq ) 3 500 ( wherein , 500 represents that the molar percentage of the red phosphorescent complex ir ( piqbr ) 3 in the whole polymer is 0 . 5 mol %) is as follows : under nitrogen atmosphere , 642 . 6 mg ( 1 mmol ) of 2 , 7 - bis ( 4 , 4 , 5 , 5 - tetramethyl - 1 , 3 - dioxo - 2 - boronalkyl )- 9 , 9 - dioctylfluorene ( commercially available ) as the reaction monomer , 540 . 2 mg ( 0 . 985 mmol ) of 2 , 7 - dibromo - 9 , 9 - dioctylfluorene ( commercially available ) and 10 . 4164 mg ( 0 . 01 mmol ) of ir ( piqbr ) 3 are added into toluene ( 13 . 6 ml ) and stirred for 30 min to fully mix and become homogenous . after mixing , 46 . 4 mg ( 0 . 04 mmol ) of pd ( pph 3 ) 4 , 2 drops of trimethyl trioctyl ammonium chloride ( aliquat 336 ) as a phase transfer catalyst , 6 ml of 2 mol / l k 2 co 3 solution are added into the mixed solution in turn , and followed by being stirred and slowly heated to refluxing temperature 94 ° c ., and the reaction is conducted at 94 ° c . for 48 h . subsequently , 20 mg of phenylboronic acid as an end - capping material is added , and the reaction is conducted for 12 h , after this , 0 . 2 ml of bromobenzene as an end - capping material is added and the reaction is conducted for another 12 h . the solution after reaction is slowly poured into methanol being rapidly stirred to separate out a pink solid after cooling to room temperature , and then filtration and dry are conducted . the resulting solid was treated by soxhlet extraction with acetone for 48 h , thereby obtaining the crude product . the crude product is purified by silica gel column chromatography ( with an eluent , chloroform ), thereby getting 414 mg of pf - ir ( piq ) 3 500 which is pink solid powders and of which yield is 53 %. 1 hnmr spectral data of pf - ir ( piq ) 3 500 of the embodiment is as follows : 1 hnmr ( 600 mhz , cdcl 3 ): δ ( ppm )= 7 . 88 ( 1h , ar — h ), 7 . 67 - 7 . 66 ( 2h , ar — h ), 2 . 15 ( 2h , ch 2 ), 1 . 28 - 1 . 02 ( 10h , 5ch 2 ), 0 . 89 - 0 . 81 ( 5h , ch 2 , ch 3 ). as can be seen from the spectrum the hydrogen atoms ( h ) on benzene ring of fluorene mainly range from 8 to 7 and mainly have two different positions , the hydrogen atoms ( h ) on alkyl chain range from 3 to 0 . 5 , and the hydrogen atoms ( h ) on the red phosphorescent ir ( piq ) 3 are not included in integral due to the low content . the average molecular weight of pf - ir ( piq ) 3 500 is measured by gel permeation chromatography , the weight - average molecular weight thereof is 50 . 0k , the number - average molecular weight thereof is 18 . 9k , and the molecular weight distribution index thereof is 2 . 65 . the glass transition temperature of the polymer is 139 ° c . and the polymer has three branches . ( 1 ) the synthetic method of ir ( piqbr ) 3 is the same as that of embodiment 1 . ( 2 ) preparation of pf - ir ( piq ) 3 500 is as follows : under nitrogen atmosphere , 642 . 6 mg ( 1 mmol ) of 2 , 7 - bis ( 4 , 4 , 5 , 5 - tetramethyl - 1 , 3 - dioxo - 2 - boronalkyl )- 9 , 9 - dioctylfluorene as a reaction monomer , 540 . 2 mg ( 0 . 985 mmol ) of 2 , 7 - dibromo - 9 , 9 - dioctylfluorene and 10 . 4164 mg ( 0 . 01 mmol ) of ir ( piqbr ) 3 are added into 20 . 4 ml of toluene and stirred for 30 min to fully mix and become homogenous . after mixing , 23 . 2 mg ( 0 . 02 mmol ) of pd ( pph 3 ) 4 , 2 drops of aliquat 336 , and 6 ml of 2 mol / l k 2 co 3 solution are added into the mixed solution in turn and heated to the refluxing temperature , and then the reaction is conducted for 48 h . after this , 20 mg of phenylboronic acid as an end - capping material is added and reacts for 12 h , and then 0 . 2 ml of bromobenzene as an end - capping material is added and reacts for another 12 h . the solution after reaction is slowly poured into methanol being rapidly stirred to separate out a pinkish white solid after cooling to room temperature , and then the pinkish white solid is filtered and dried . the resulting solid is treated by soxhlet extraction with acetone for 48 h , thereby obtaining the crude product , and then the crude product is purified by silica gel column chromatography ( with an eluent , chloroform ), thereby obtaining 320 . 3 mg of pf - ir ( piq ) 3 500 which is pink solid powders and of which yield is 41 %. ( a ) synthetic method of the cyclometalated iridium ( iii ) μ - chlorobridged dimer ( ir ( iii ) chloride bridge dimer ) is the same as that of embodiment 1 . ( b ) preparation of tris ( 2 -( 4 - bromophenyl )- isoquinoline ) iridium ir ( piqbr ) 3 is as follows : under nitrogen atmosphere , 316 mg ( 0 . 2 mmol ) of the cyclometalated iridium ( iii ) μ - chlorobridged dimer ( ir ( iii ) chloride bridge dimer ), 125 mg ( 0 . 44 mmol ) of piqbr and 22 mg ( 0 . 1 mmol ) of silver trifluoroacetate are dissolved in 16 ml of degassed glycerol . the resulting mixture is slowly heated to 130 ° c . and reacts for 24 h . a large amount of water is added into the solution after reaction to separate out a red precipitate after cooling to room temperature , and then the red precipitate is filtered and dried . the resulting crude solid product is purified by silica gel column chromatography ( with an eluent , dichloromethane / petroleum ether ( 1 : 8 )), thereby getting 32 . 8 mg of tris ( 2 -( 4 - bromophenyl )- isoquinoline ) iridium ( ir ( piqbr ) 3 ) which is dark red solid powder and of which yield is 7 . 8 %. ( 2 ) the method for preparing pf - ir ( piq ) 3 500 is the same as that of embodiment 1 ( 3 ). ( 1 ) the synthetic method of ir ( piqbr ) 3 is the same as that of embodiment 1 . ( 2 ) the preparation of pf - ir ( piq ) 3 100 ( 100 represents that the molar percentage of the red phosphorescent ir ( piqbr ) 3 in the whole polymer is 0 . 1 mol %) is as follows : under nitrogen atmosphere , 642 . 6 mg ( 1 mmol ) of 2 , 7 - bis ( 4 , 4 , 5 , 5 - tetramethyl - 1 , 3 - dioxo - 2 - boronalkyl )- 9 , 9 - dioctylfluorene as a reaction monomer , 546 . 8 mg ( 0 . 98597 mmol ) of 2 , 7 - dibromo - 9 , 9 - dioctylfluorene and 2 . 08328 mg ( 0 . 002 mmol ) of ir ( piqbr ) 3 are added into 13 . 6 ml of toluene and stirred for 30 min to fully mix and become homogenous . 46 . 4 mg ( 0 . 04 mmol ) of pd ( pph 3 ) 4 , 2 drops of aliquat 336 , 6 ml of 2 mol / l k 2 co 3 solution are added into the mixed solution in turn , and followed by being stirred and slowly being heated to refluxing temperature 94 ° c ., and then the reaction is conducted for 48 h . after this , 20 mg of phenylboronic acid as an end - capping material is added and the reaction is conducted for 12 h , and then 0 . 2 ml of bromobenzene as an end - capping material is added and the reaction is conducted for another 12 h . the solution after reaction is slowly poured into methanol being rapidly stirred to separate out a yellowish white solid after cooling to room temperature , and then the yellowish white solid is filtered and dried . the resulting solid is treated by soxhlet extraction with acetone for 48 h , thereby obtaining the crude product , and then the crude product is purified by silica gel column chromatography ( with an eluent , chloroform ), thereby getting 461 mg of pf - ir ( piq ) 3 100 which is yellowish red solid powders and of which yield is 59 %. 1 hnmr spectral data of pf - ir ( piq ) 3 100 of the embodiment is as follows : 1 hnmr ( 600 mhz , cdcl 3 ): δ ( ppm )= 7 . 84 ( 1h , ar — h ), 7 . 74 - 7 . 63 ( 2h , ar — h ), 2 . 13 ( 2h , ch 2 ), 1 . 24 - 1 . 05 ( 10h , 5ch 2 ), 0 . 86 - 0 . 74 ( 5h , ch 2 , ch 3 ). as can be seen from the spectrum , the hydrogen atoms ( h ) on benzene ring of fluorene mainly range from 8 to 7 and mainly have two different peak positions , the hydrogen atoms ( h ) on alkyl chain range from 3 to 0 . 5 , and the hydrogen atoms ( h ) on red phosphorescent ir ( piq ) 3 are not included in integral due to the low content . since only changing the content of less red phosphorescent ir ( piq ) 3 , the variation tendency of the spectrum of pf - ir ( piq ) 3 100 is the same as that of pf - ir ( piq ) 3 500 . the weight - average molecular weight of pf - ir ( piq ) 3 100 measured by gel permeation chromatography is 40 . 8k , the number - average molecular weight thereof is 9 . 3k , and the molecular weight distribution index thereof is 4 . 38 . the glass transition temperature of the polymer is 155 ° c ., and the polymer has three branches . ( 1 ) synthetic method of complex ir ( piqbr ) 3 is the same as that of embodiment 1 . ( 2 ) preparation of pf - ir ( piq ) 3 50 ( 50 represents that the molar percentage of the red phosphorescent ir ( piqbr ) 3 in the whole polymer is 0 . 05 mol %) is as follows : under nitrogen atmosphere , 642 . 6 mg ( 1 mmol ) of 2 , 7 - bis ( 4 , 4 , 5 , 5 - tetramethyl - 1 , 3 - dioxo - 2 - boronalkyl )- 9 , 9 - dioctylfluorene as a reaction monomer , 547 . 6 mg ( 0 . 9985 mmol ) of 2 , 7 - dibromo - 9 , 9 - dioctylfluorene , and 1 . 04164 mg ( 0 . 001 mmol ) of ir ( piqbr ) 3 are added into 13 . 34 ml of toluene and stirred for 30 min to fully mix and become homogenous . 46 . 4 mg ( 0 . 04 mmol ) of pd ( pph 3 ) 4 , 2 drops of aliquat 336 , and 6 ml of 2 mol / l k 2 co 3 solution are added into the mixed solution in turn , and followed by being stirred and slowly being heated to the refluxing temperature 94 ° c . and then the reaction is conducted for 48 h . whereafter , 20 mg of phenylboronic acid as an end - capping material is added and the reaction is conducted for 12 h , after this , 0 . 2 ml of bromobenzene as an end - capping material is added and the reaction is conducted for another 12 h . the solution after reaction is slowly poured into methanol being rapidly stirred to separate out the yellowish - white solid after cooling to room temperature , and then the yellowish - white solid is filtered and dried . the resulting solid is treated by soxhlet extraction with acetone for 48 h , thereby obtaining a crude product , and then the crude product is purified by silica gel column chromatography ( with an eluent , chloroform ), thereby getting 475 mg of pf - ir ( piq ) 3 50 which is yellowish - white solid powder and of which yield is 61 %. 1 hnmr spectral data of pf - ir ( piq ) 3 50 is shown in fig3 , 1 hnmr ( 600 mhz , cdcl 3 ): δ ( ppm )= 7 . 84 ( 1h , ar — h ), 7 . 74 - 7 . 63 ( 2h , ar — h ), 2 . 13 ( 2h , ch 2 ), 1 . 24 - 1 . 05 ( 10h , 5ch 2 ), 0 . 86 - 0 . 74 ( 5h , ch 2 , ch 3 ). as can be seen from the spectrum , the hydrogen atoms ( h ) of the polymer mainly are the hydrogen atoms ( h ) on benzene ring and the hydrogen atoms ( h ) on alkyl chain . the hydrogen atoms ( h ) on benzene ring mainly are between 8 and 7 . 5 , the hydrogen atoms ( h ) on alkyl chain mainly are between 2 . 5 and 0 . 5 , and the hydrogen atom ( h ) characteristic peaks are not obvious due to the low content of m complex . the number - average molecular weight of pf - ir ( piq ) 3 50 measured by gel permeation chromatography is 11 . 1k , the weight - average molecular weight thereof is 23 . 0k , and the molecular weight distribution index is 2 . 06 . the glass transition temperature of the polymer is 148 ° c ., and the polymer has three branches . ( 1 ) synthetic method of ir ( piqbr ) 3 is the same as that of embodiment 1 . ( 2 ) preparation of pf - ir ( piq ) 3 25 ( 25 represents that the molar percentage of the red phosphorescent ir ( piqbr ) 3 in the whole polymer is 0 . 025 mol %) is as follows : under nitrogen atmosphere , 642 . 6 mg ( 1 mmol ) of 2 , 7 - bis ( 4 , 4 , 5 , 5 - tetramethyl - 1 , 3 - dioxo - 2 - boronalkyl )- 9 , 9 - dioctylfluorene as a reaction monomer , 547 . 6 mg ( 0 . 99925 mmol ) of 2 , 7 - dibromo - 9 , 9 - dioctylfluorene and 0 . 52082 mg ( 0 . 0005 mmol ) of ir ( piqbr ) 3 are added into 13 . 34 ml of toluene and stirred for 30 min to fully mix and become homogenous . 46 . 2 mg ( 0 . 04 mmol ) of pd ( pph 3 ) 4 , 2 drops of aliquat 336 , and 6 ml of 2 mol / l k 2 co 3 solution are added into the mixed solution in turn , and followed by being stirred and slowly being heated to the refluxing temperature , and then the reaction is conducted for 48 h . whereafter , 20 mg of phenylboronic acid as an end - capping material is added and the reaction is conducted for 12 h , and then 0 . 2 ml of bromobenzene as an end - capping material is added and the reaction is conducted for another 12 h . the solution after reaction is slowly poured into methanol being rapidly stirred to separate out a greenish white solid after cooling to room temperature , and then the greenish white solid is filtered and dried . the resulting solid is treated by soxhlet extraction with acetone for 48 h , thereby obtaining a crude product , and then the crude product is purified by silica gel column chromatography ( with an eluent , chloroform ), thereby getting 555 mg of pf - ir ( piq ) 3 25 which is greenish white powder and of which yield is 71 %. 1 hnmr spectral data of pf - ir ( piq ) 3 25 of the embodiment is as follows : 1 hnmr ( 600 mhz , cdcl 3 ): δ ( ppm )= 7 . 84 ( 1h , ar — h ), 7 . 73 - 7 . 64 ( 2h , ar — h ), 2 . 12 ( 2h , ch 2 ), 1 . 25 - 1 . 02 ( 10h , 5ch 2 ), 0 . 90 - 0 . 73 ( 5h , ch 2 , ch 3 ). it can be seen from the spectrum that the variation tendency of pf - ir ( piq ) 3 25 is the same as the variation tendencies of pf - ir ( piq ) 3 500 and pf - ir ( piq ) 3 100 . the number - average molecular weight of pf - ir ( piq ) 3 25 measured by gel permeation chromatography is 11 . 0k , the weight - average molecular weight thereof is 21 . 7k , and the molecular weight distribution index is 1 . 96 . the glass transition temperature of the polymer is 133 ° c ., and the polymer has three branches . ( 1 ) preparation of 2 -( 5 -( 4 - bromo ) phenyl - 2h - 1 , 2 , 4 - triazol - 3 - yl ) pyridine is as follows and has the reaction mechanism shown as following equation : ( a ) under nitrogen atmosphere , 10 . 4 g ( 0 . 1 mol ) of 2 - cyanopyridine and 5 . 5 g ( 0 . 11 mol ) of hydrazine hydrate are added into 5 ml of ethanol , and stirred at room temperature overnight . after stopping the reaction , the solvent is dried by pumping , thereby separating out white needle - like crystals , and then the white needle - like crystals is washed with diethyl ether and filtered , thereby achieving 9 . 22 g of ( 2 - pyridinyl ) amino hydrazone in yield of 68 %. ( b ) 2 . 0 g ( 15 mmol ) of ( 2 - pyridinyl ) amino hydrazone and 1 . 6 g ( 15 mmol ) of anhydrous sodium carbonate are added into the mixture of 15 ml of dimethylacetamide ( dmac ) and 5 ml of anhydrous tetrahydrofuran ( thf ), and followed by being evacuated , being introduced nitrogen and being stirred until room temperature . and then 3 . 27 g ( 15 mmol ) of 4 - bromobenzoyl chloride dissolved in 5 ml of dmac is dropwise added into the mixed solution mentioned above , whereafter , the reaction is conducted in the ice bath for 2 h and subsequently at room temperature for 3 h . after stopping the reaction , washing with water , filtering , washing with ethanol and drying are conducted , thereby obtaining a grayish yellow solid . the solid is added into ethylene glycol , and slowly heated to 190 ° c . , and then the reaction is conducted at 190 ° c . for 5 h . after cooling to room temperature and washing with water , 1 . 86 g of 2 -( 5 -( 4 - bromo )- phenyl - 2h - 1 , 2 , 4 - triazol - 3 - yl ) pyridine being a grayish white needle - like solid is achieved in 62 % yield . 1 hnmr spectral data of the grayish white needle - like solid is as follows : 1 hnmr ( 600 mhz , cdcl 3 ): δ ( ppm )= 12 . 21 ( s , 1h ), 8 . 72 ( d , j = 4 . 2 hz , 1h ), 8 . 30 ( d , j = 8 . 4 hz , 1h ), 8 . 10 ( d , j = 8 . 4 hz , 2h ), 7 . 90 ( dt , j 1 = 7 . 8 , j 2 = 1 . 8 hz , 1h ), 7 . 61 ( d , j = 8 . 4 hz , 2h ), 7 . 43 ( dd , j 1 = 4 . 6 hz , j 2 = 4 . 8 hz , 3h ). as can be seen from the 1 h nmr spectrum , there is a active h for the ancillary ligands at 12 . 21 position , and the hydrogen atoms ( h ) at other positions is on benzene ring and thus between 9 and 7 . ( 2 ) preparation of bis ( 2 - phenyl - isoquinoline )( 2 -( 5 - phenyl - 2h - 1 , 2 , 4 - triazol - 3 - yl )- pyridine ) iridium ( ir ( piqbr ) 2 ( pytzphbr )) is as follows and has a reaction mechanism shown as following equation : ( a ) under nitrogen atmosphere , 317 mg ( 1 mmol ) of iridium trichloride and 622 mg ( 2 . 2 mmol ) of piqbr are dissolved in a mixture of 21 ml of 2 - ethoxyethanol and 7 ml of water , and followed by being stirred , being slowly heated to 115 ° c . and reacting for 24 h . the solution after reaction is cooled to room temperature after stopping the reaction , and then is washed with water and filtered , thereby obtaining a red crude product being a precipitate . the precipitate is washed with ethanol and then is dried thereby achieving the cyclometalated iridium ( iii ) μ - chlorobridged dimer ( ir ( iii ) chloride bridge dimer ) being reddish brown solid powders . ( b ) under nitrogen atmosphere , 316 mg ( 0 . 2 mmol ) of the cyclometalated iridium ( iii ) μ - chlorobridged dimer ( ir ( iii ) chloride bridge dimer ), 97 . 7 mg ( 0 . 44 mmol ) of 2 -( 5 -( 4 - bromo )- phenyl - 2h - 1 , 2 , 4 - triazole - 3 - yl ) pyridine and 212 mg ( 2 mmol ) of anhydrous sodium carbonate are dissolved in 16 ml of 2 - ethoxyethanol , and followed by being stirred and slowly heated to 125 ° c ., and reacting for 24 h . a large amount of water is added into the solution after reaction cooled to room temperature to separate out a red solid after stopping the reaction , and then the red solid is filtered and dried . the resulting crude solid product is purified by silica gel column chromatography ( with an eluent , dichloromethane / petroleum ether ( 1 : 6 )), thereby achieving 262 mg of bis ( 2 - phenyl - isoquinoline ) ( 2 -( 5 - phenyl - 2h - 1 , 2 , 4 - triazol - 3 - yl ) pyridine ) iridium ( ir ( piqbr ) 2 ( pytzphbr )) being orangish red solid powders in 67 % yield . 1 hnmr spectral data of ( ir ( piqbr ) 2 ( pytzphbr )) is as follows : 1 hnmr ( 600 mhz , ( cd 3 ) 2 os ): δ ( ppm )= 9 . 01 - 8 . 95 ( m , 2h ), 8 . 35 ( d , j = 8 . 4 hz , 1h ), 8 . 32 ( d , j = 8 . 4 hz , 1h ), 8 . 19 ( d , j = 8 . 4 hz , 1h ), 8 . 05 - 8 . 09 ( m , 3h ), 7 . 88 - 7 . 92 ( m , 6h ), 7 . 73 ( d , j = 6 hz , 1h ), 7 . 66 ( dd , j = 6 . 6 hz , 1h ), 7 . 64 ( dd , j = 6 hz , 1h ), 7 . 60 ( d , j = 6 . 6 hz , 1h ), 7 . 57 ( d , j = 6 hz , 1h ), 7 . 54 ( d , j = 8 . 4 hz , 2h ), 7 . 43 ( ddd , j 1 = 7 . 2 hz , j 2 = 5 . 4 hz , j 3 = 1 . 2 hz , 1h ), 7 . 32 ( dd , j 1 = 8 . 4 hz , j 2 = 1 . 8 hz , 1h ), 7 . 25 ( d , j 1 = 9 hz , j 2 = 1 . 8 hz , 1h ), 6 . 39 ( d , j = 1 . 8 hz , 1h ), 6 . 29 ( d , j = 1 . 8 hz , 1h ). the elemental analysis result in theory is as follows : by percent (%), c , 48 . 79 ; h , 2 . 48 ; n , 7 . 94 ; the detecting result is as follows : by percent (%) c , 49 . 27 ; h , 2 . 86 ; n , 6 . 53 . tof - ms testing value is 1057 . 08 , and calculated value is 1058 . 64 . ( 3 ) preparation of pf - ir ( piq ) 2 ( pytzph ) 500 ( 500 represents that the molar percentage of the red phosphorescent ir ( piq ) 2 ( pytzph ) in the whole polymer is 0 . 5 mol %) is as follows and has a reaction mechanism shown as following equation : under nitrogen atmosphere , 642 . 6 mg ( 1 mmol ) of 2 , 7 - bis ( 4 , 4 , 5 , 5 - tetramethyl - 1 , 3 - dioxo - 2 - boronalkyl )- 9 , 9 - dioctylfluorene as a reaction monomer , 540 . 2 mg ( 0 . 985 mmol ) of 2 , 7 - dibromo - 9 , 9 - dioctylfluorene and 10 . 59 mg ( 0 . 01 mmol ) of ir ( piqbr ) 2 ( pytzphbr ) are added into 30 ml of toluene and stirred for 30 min to fully mix and become homogenous . then , 46 . 4 mg ( 0 . 04 mmol ) of pd ( pph 3 ) 4 , 2 drops of aliquat 336 and 6 ml of 2 mol / l k 2 co 3 solution sequentially are added into the mixed solution , and followed by being stirred and slowly heated to the refluxing temperature 94 ° c ., and reacting for 48 h . subsequently , 20 mg of phenylboronic acid as an end - capping material is added and the reaction is conducted for 12 h , and then 0 . 2 ml of bromobenzene as an end - capping material is added and the reaction is conducted for another 12 h . the solution after reaction cooled to room temperature is slowly poured into methanol being rapidly stirred to separate out a pinkish white solid after stopping the reaction , and then the pinkish white solid is filtered and dried . the resulting solid is treated by soxhlet extraction with acetone for 48 h , thereby obtaining a crude product , and then the crude product is purified by silica gel column chromatography ( with eluent , chloroform ), thereby getting 493 mg of pf - ir ( piq ) 2 ( pytzph ) 500 being pinkish white solid powders in 63 % yield . 1 hnmr spectral data of pf - ir ( piq ) 2 ( pytzph ) 500 is as follows : 1 hnmr : ( 600 mhz , cdcl 3 ): δ ( ppm )= 7 . 882 ( 1h , ar — h ), 7 . 69 - 7 . 658 ( 2h , ar — h ), 2 . 153 ( 2h , ch 2 ), 1 . 270 - 1 . 097 ( 10h , 5ch 2 ), 0 . 877 - 0 . 812 ( 5h , ch 2 , ch 3 ). it can be seen from the spectrum that pf - ir ( piq ) 2 ( pytzph ) 500 has the same variation tendency with pf - ir ( piq ) 3 , because both of them belong to a polymer with polyfluorene system and the doping amount of red light as a core is too low . the number - average molecular of pf - ir ( piq ) 2 ( pytzph ) 500 measured by gel permeation chromatography is 15 . 6k , the weight - average molecular weight thereof is 37 . 0k , and the molecular weight distribution index is 2 . 25 . the glass transition temperature of the polymer is 145 ° c ., and the polymer has three branches . ( 1 ) synthetic method of ir ( piqbr ) 2 ( pytzphbr ) is the same as that of embodiment 6 ; ( 2 ) preparation of pf - ir ( piq ) 2 ( pytzph ) 50 ( 50 represents that the molar percentage of the red phosphorescent ir ( piq ) 2 ( pytzph ) in the whole polymer is 0 . 05 mol %) is as follows : under the protection of nitrogen , 642 . 6 mg ( 1 mmol ) of 2 , 7 - bis ( 4 , 4 , 5 , 5 - tetramethyl - 1 , 3 - dioxo - 2 - boronalkyl )- 9 , 9 - dioctylfluorene as a reaction monomer , 547 . 6 mg ( 0 . 9985 mmol ) of 2 , 7 - dibromo - 9 , 9 - dioctylfluorene and 1 . 05864 mg ( 0 . 001 mmol ) of ir ( piqbr ) 2 ( pytzphbr ) are added into 30 ml of toluene and stirred for 30 min to fully mix and become homogenous . then , 46 . 4 mg ( 0 . 04 mmol ) of pd ( pph 3 ) 4 , 2 drops of aliquat 336 and 6 ml of 2 mol / l k 2 co 3 solution are added into the mixed solution sequentially , and followed by being stirred and slowly heated to the refluxing temperature 94 ° c ., and reacting for 48 h . subsequently , 20 mg of phenylboronic acid as an end - capping material is added and the reaction is conducted for 12 h , and then 0 . 2 ml of bromobenzene as an end - capping material is added and the reaction is conducted for another 12 h . the solution after reaction cooled to room temperature is slowly poured into methanol being rapidly stirred to separate out a light yellow solid after stopping the reaction , and then the light yellow solid is filtered and dried . the resulting solid is treated by soxhlet extraction with acetone for 48 h , thereby obtaining a crude product , and then the crude product is purified by silica gel column chromatography ( with an eluent , chloroform ), thereby getting 381 mg of pf - ir ( piq ) 2 ( pytzph ) 50 being light yellow solid powders in 49 % yield . 1 hnmr spectral data of pf - ir ( piq ) 2 ( pytzph ) 50 is as follows : 1 hnmr : ( 600 mhz , cdcl 3 ): β ( ppm )= 7 . 84 ( 1h , ar — h ), 7 . 73 - 7 . 63 ( 2h , ar — h ), 2 . 13 ( 2h , ch 2 ), 1 . 26 - 1 . 04 ( 10h , 5ch 2 ), 0 . 90 - 0 . 73 ( 5h , ch 2 , ch 3 ). it can be seen from the spectrum that pf - ir ( piq ) 2 ( pytzph ) 50 has the same variation tendency with pf - ir ( piq ) 3 , because both of them belong to a polymer with polyfluorene system and the doping amount of red light emitting core is too low . the number - average molecular weight of pf - ir ( piq ) 2 ( pytzph ) 50 measured by gel permeation chromatography is 13 . 6k , the weight - average molecular weight thereof is 36 . 7k , and the molecular weight distribution index is 2 . 69 . the glass transition temperature of the polymer is 153 ° c ., and the polymer has three branches . ( 1 ) synthetic method of ir ( piqbr ) is the same as that of embodiment 1 ; ( 2 ) preparation of 3 , 6 - dibromo [ 9 -( 2 - ethylhexyl )] carbazole is as follows and has a reaction mechanism shown as following equation : under the protection of nitrogen , 16 . 3 g ( 50 mmol ) of 3 , 6 - dibromocarbazole and 9 . 7 g ( 50 mmol ) of 2 - ethylhexyl bromide ( bromoisooctane ) are dissolved in 100 ml of toluene , and stirred until fully dissolution . and then 4 . 8 g ( 15 mmol ) of tetrabutyl ammonium bromide ( tbab ), 40 ml of aqueous solution of koh ( 22 . 4 g , 0 . 4 mol ) and 60 ml of toluene are added into the reaction solution in turn , and stirred for 8 h at room temperature when the solution is milk white , and followed by being slowly heated to 130 ° c . when the solution becomes yolk yellow , and the reaction is conducted for 36 h , the solution after reaction is cooled to room temperature . and then the solvent in the mixed solution is removed by rotary evaporation , and the resulting crude product is dissolved in ch 2 cl 2 , washed with water and dried . after rotary evaporation , the crude product is purified by column chromatography on silica gel ( with an eluent , petroleum ether : ch 2 cl 2 ( 5 : 1 )), thereby obtaining 16 . 6 g of 3 , 6 - dibromo [ 9 -( 2 - ethylhexyl )] carbazole being a white needle - like crystal in 76 % yield . 1 h nmr spectral data of 3 , 6 - dibromo [ 9 -( 2 - ethylhexyl )] carbazole being a white needle - like crystal is as follows : 1 hnmr : ( 600 mhz , ( cd 3 ) 2 so ): δ ( ppm )= 8 . 03 ( d , j = 1 . 8 hz , 2h ), 7 . 56 ( dd , j 1 = 9 hz , j 2 = 1 . 8 hz , 2h ), 7 . 15 ( d , j = 8 . 4 hz , 2h ), 3 . 81 - 3 . 93 ( m , 2h ), 1 . 94 - 2 . 03 ( m , 1h ), 1 . 27 - 1 . 44 ( m , 8h ), 0 . 91 - 1 . 02 ( m , 6h ). as shown in the 1 hnmr spectrum , the hydrogen atoms ( h ) on benzene ring of carbazole are between 8 . 5 ˜ 7 which have three different peak positions due to the symmetry of benzene ring of carbazole . the hydrogen atoms ( h ) on the alkyl chain mainly are between 4 ˜ 0 . 9 . ( 3 ) preparation of pfcz5000 - ir ( piq ) 3 50 ( 5000 represents that the molar percentage of the isooctyl carbazole in the whole polymer is 5 mol %; and 50 represents that the molar percentage of the red phosphorescent ir ( piq ) 3 in the whole polymer is 0 . 05 mol %): under the protection of the nitrogen , 642 . 6 mg ( 1 mmol ) of 2 , 7 - bis ( 4 , 4 , 5 , 5 - tetramethyl - 1 , 3 - dioxo - 2 - boronalkyl )- 9 , 9 - dioctylfluorene , 492 . 8 mg ( 0 . 8985 mmol ) of 2 , 7 - dibromo - 9 , 9 - dioctylfluorene , 43 . 8 mg ( 0 . 1 mmol ) of 3 , 6 - dibromo [ 9 -( 2 - ethylhexyl )] carbazole and 1 . 04164 mg ( 0 . 001 mmol ) of ir ( piqbr ) 3 are added into the toluene and stirred for 30 min to fully mix and become homogenous . then , 46 . 4 mg ( 0 . 04 mmol ) of pd ( pph 3 ) 4 , two drops of aliquat 336 and 6 ml of 2 mol / l k 2 co 3 solution are added into the mixed solution in turn , stirred and slowly heated to the refluxing temperature 94 ° c ., and the reaction is conducted for 48 h . whereafter , 20 mg of phenylboronic acid as an end - capping material is added and the reaction is conducted for 12 h , and then 0 . 2 ml of bromobenzene as an end - capping material is added and the reaction is conducted for another 12 h . the solution after reaction is cooled to room temperature after stopping the reaction and then is slowly poured into methanol being rapidly stirred to separate out the solid , subsequently , the solid is filtered and dried . the resulting solid is treated by soxhlet extraction with acetone for 48 h , thereby obtaining a crude product . and then the crude product is purified by silica gel column chromatography ( with an eluent , chloroform ), thereby obtaining pfcz5000 - ir ( piq ) 3 50 being solid powders . ( 1 ) synthetic method of ir ( piqbr ) 3 is the same as that of embodiment 1 ; ( 2 ) preparation of 9 -( 6 - bromohexyl ) carbazole is as follows and has a reaction mechanism shown as following equation : under the protection of nitrogen , 5 . 00 g ( 31 mmol ) of carbazole and 70 . 00 g ( 300 mmol ) of 1 , 6 - dibromohexane are added into 80 ml of toluene . and then 0 . 5 g ( 15 mmol ) of tetrabutyl ammonium bromide ( tbab ) dissolved in 5 ml of deionized water and 15 ml of 2 mol / l aqueous solution of koh are poured into the reaction system . the mixture is extracted by dichloromethane after stopping the reaction , and then the resulting organic phase is washed with deionized water , dried with anhydrous magnesium sulfate and filtered , and subsequently , the solvent is evaporated under reduced pressure . the resulting crude product is purified by silica gel column chromatography ( with an eluent , petroleum ether : dichloromethane : absolute alcohol ( 20 : 2 : 1 )), thereby obtaining 8 . 50 g of 9 -( 6 - bromohexyl ) carbazole being a needle - like white solid in 56 % yield . 1 h nmr spectral data of 9 -( 6 - bromohexyl ) carbazole is as follows : 1 h nmr ( cdcl 3 ): δ ( ppm )= 8 . 10 ( ddd , j 1 = 7 . 8 hz , j 2 = 1 . 2 hz , j 3 = 0 . 6 hz , 2h ), 7 . 46 ( dt , j 1 = 7 . 8 hz , j 2 = 6 . 6 hz , j 3 = 1 . 2 hz , 2h ), 7 . 40 ( dt , j 1 = 7 . 8 hz , j 2 = j 3 = 0 . 6 hz , 2h ), 7 . 23 ( ddd , j 1 = 7 . 8 hz , j 2 = 7 . 2 hz , j 3 = 1 . 2 hz , 2h ), 4 . 32 ( t , j = 7 . 2 hz , 2h ), 3 . 36 ( t , j = 6 . 6 hz , 2h ), 1 . 82 - 1 . 90 ( m , 4h ), 1 . 41 - 1 . 48 ( m , 4h ). as shown in the spectrum , the four hydrogen atoms ( h ) on carbazole at different positions are located between 8 . 5 ˜ 7 , which belong to h on benzene ring ; and the hydrogen atoms ( h ) on alkyl chain are located between 4 . 5 ˜ 1 . ( 3 ) preparation of 9 , 9 - bis ( 9 -( 6 - hexyl ) carbazole )- 2 , 7 - dibromofluorene is as follows and has a reaction mechanism shown as following equation : under the protection of nitrogen , 4 . 86 g ( 15 mmol ) of 2 , 7 - dibromofluorene and 9 . 9 g ( 30 mmol ) of 9 -( 6 - bromohexyl ) carbazole are dissolved in 100 ml of toluene in a three - neck flask , and then 0 . 322 g ( 1 mmol ) of tetrabutyl ammonium bromide and 30 ml of naoh ( 4 . 0 g , 0 . 1 mol )) aqueous solution are added in the state of stirring and stirred for another 30 min . whereafter , the mixture is slowly heated to 75 ° c . and reacts for 24 h , and followed by being cooled to room temperature . toluene in the solution cooled is removed by rotary evaporation , after that , the resulting crude product is dissolved in ch 2 cl 2 , is washed with water and dried , and then the solvent is removed by rotary evaporation . the resulting product is purified by the silica gel column chromatography with hexane and ch 2 cl 2 as eluents , thereby achieving 9 , 9 - bis ( 9 -( 6 - hexyl ) carbazole )- 2 , 7 - dibromofluorene . ( 4 ) preparation of pffcz5000 - ir ( piq ) 3 50 ( 5000 represents that the molar percentage of 9 , 9 - bis ( 9 -( 6 - hexyl ) carbazole )- 2 , 7 - dibromofluorene in the whole polymer is 5 mol %; and 50 represents that the molar percentage of the red phosphorescent ir ( piq ) 3 in the whole polymer is 0 . 05 mol %) is as follows : under the protection of nitrogen gas , 642 . 6 mg ( 1 mmol ) of 2 , 7 - bis ( 4 , 4 , 5 , 5 - tetramethyl - 1 , 3 - dioxo - 2 - boronalkyl )- 9 , 9 - dioctylfluorene as a reaction monomer , 492 . 8 mg ( 0 . 8985 mmol ) of 2 , 7 - dibromo - 9 , 9 - dioctylfluorene , 82 . 3 mg ( 0 . 1 mmol ) of 9 , 9 - bis ( 9 -( 6 - hexyl ) carbazole )- 2 , 7 - dibromofluorene , and 1 . 04164 mg ( 0 . 001 mmol ) of ir ( piqbr ) 3 are added into toluene and stirred for 30 min to fully mix and become homogenous . and then , 46 . 4 mg ( 0 . 04 mmol ) of pd ( pph 3 ) 4 , two drops of aliquat 336 and 6 ml of 2 mol / l k 2 co 3 aqueous solution are added into the mixed solution in turn , and followed by being stirred , being slowly heated to the refluxing temperature 94 ° c . and reacting for 48 h . subsequently , 20 mg of phenylboronic acid as an end - capping material is added and the reaction is conducted for 12 h , and then 0 . 2 ml of bromobenzene as an end - capping material is added and the reaction is conducted for another 12 h . after stopping the reaction , the solution is cooled to the room temperature and slowly poured into methanol being rapidly stirred to separate out a solid , and then the solid is filtered and dried . the resulting solid is treated by soxhlet extraction using acetone for 48 h , thereby obtaining a crude product . the crude product is purified by column chromatography on silica gel ( with an eluent , chloroform ), thereby obtaining pffcz5000 - ir ( piq ) 3 50 being solid powers . ( 1 ) synthetic method of ir ( piqbr ) 3 is the same as that of embodiment 1 ; ( 2 ) preparation of 9 , 9 - bis ( 2 - ethylhexyl )- 2 , 7 - dibromofluorene is as follows : under nitrogen gas atmosphere , 4 . 86 g ( 15 mmol ) of 2 , 7 - dibromofluorene and 5 . 79 g ( 30 mmol ) of bromoisooctane are dissolved in 60 ml of toluene in a three - neck flask and stirred until being dissolved . then , 0 . 322 g ( 1 mmol ) of tetrabutyl ammonium bromide and 30 ml of naoh ( 4 . 0 g , 0 . 1 mol )) aqueous solution are added into the three - neck flask and stirred for 30 min , and followed by being slowly heated to 75 ° c . and reacting for 24 h , and then being cooled to the room temperature . the toluene in solution cooled is removed by rotary evaporation . the resulting crude product is dissolved in ch 2 cl 2 , washed with water and dried , and then the solvent is removed by rotary evaporation . the resulting product is purified by the column chromatography on silica gel ( with eluents , n - hexane and ch 2 cl 2 ), thereby obtaining 9 , 9 - bis ( 2 - ethylhexyl )- 2 , 7 - dibromofluorene . ( 3 ) preparation of pff - ir ( piq ) 3 50 ( 50 represents that the molar percentage of the red phosphorescent ir ( piq ) 3 in the whole polymer is 0 . 05 mol %) is as follows : under the protection of nitrogen gas , 642 . 6 mg ( 1 mmol ) of 2 , 7 - bis ( 4 , 4 , 5 , 5 - tetramethyl - 1 , 3 - dioxo - 2 - boronalkyl )- 9 , 9 - dioctylfluorene , 547 . 6 mg ( 0 . 9985 mmol ) of 2 , 7 - dibromo - 9 , 9 -( 2 - ethylhexyl ) fluorene and 1 . 04164 mg ( 0 . 001 mmol ) of ir ( piqbr ) 3 are added into toluene and stirred for 30 min to fully mix and become homogenous . then , 46 . 4 mg ( 0 . 04 mmol ) of pd ( pph 3 ) 4 , two drops of aliquat 336 and 6 ml of 2 mol / l k 2 co 3 aqueous solution are added into the reaction solution in turn , and followed by being stirred and slowly heated to the refluxing temperature , and reacting for 48 h . whereafter , 20 mg of phenylboronic acid as an end - capping material is added and the reaction is conducted for 12 h , and then 0 . 2 ml of bromobenzene as an end - capping material is added and the reaction is conducted for another 12 h . after stopping the reaction , the reaction solution is cooled to the room temperature and slowly poured into methanol being rapidly stirred to separate out a solid , and then the solid is filtered and dried . the resulting solid is treated with acetone by soxhlet extraction for 48 h , thereby obtaining a crude product . the crude product is purified by column chromatography on silica gel ( with an eluent , chloroform ), thereby obtaining pff - ir ( piq ) 3 50 being solid powers . pf - ir ( piq ) 3 50 generated from embodiment 5 is dissolved in chloroform to prepare chloroform solutions with different concentrations of pf - ir ( piq ) 3 50 ( 10 − 3 mol / l , 10 − 4 mol / l , 10 − 5 mol / l , 10 − 6 mol / l , 10 − 7 mol / l ), photoluminescence ( pl ) spectra ( namely photoluminescence spectra ) of each solution are measured using fluoromax - 4 fluorescence spectrograph produced by horiba jobin yvon company from france . fig4 shows the pl spectra of chloroform solutions with different concentrations of pf - ir ( piq ) 3 50 . as can be seen from fig4 , the polymer has three main emission peaks which are located at 417 nm , 445 nm and 632 nm respectively . with increase of concentration of the polymer , the emission peak at 417 nm has a red - shift , and the intensity of the emission peak at 445 nm enhances . when the concentration is up to 10 − 4 mol / l , the peak at 445 nm becomes the maximum emission peak . the red emission is not be detected at low concentration . when the concentration is increased to 10 − 3 mol / l , the red emission peak comes out . the polymer is dissolved in chloroform , to obtain a chloroform solution with the concentration of 10 mg / ml , and then the solution is spin - coated on the quartz glass to prepare a thin film . the ultraviolet - visible ( uv - vis ) absorption spectrum and the pl spectrum of the thin film are measured to characterize photophysical performance of the polymer in the state of thin film . fig5 shows the uv - vis absorption spectrum and the pl spectrum of pf - ir ( piq ) 3 50 prepared by embodiment 5 in the state of thin film . the maximum absorption peak for the polymer in the state of thin film is located at 382 nm and the maximum emission peak thereof is located at 422 nm . there is a small emission band at 625 nm which belongs to the red emission peak of ir complex . by analyzing the photophysical performance of the hyperbranched polymer pf - ir ( piq ) 3 50 , the uv - vis absorption spectrum and pl spectrum of this system have been investigated , which facilitate the fabrication of the organic electroluminescent devices . the organic electroluminescent device with the structure of ito / pedot : pss ( 50 nm )/ polymer ( 80 nm )/ tpbi ( 40 nm )/ lif ( 1 nm )/ al ( 100 nm ) is fabricated using the pf - ir ( piq ) 3 500 obtained from embodiment 1 . the electroluminescent spectra and color coordination of the device are measured by spectral scanning colorimeter pr655 produced by american crowntech to characterize the electroluminescent performance of the polymer . the organic electroluminescent device mentioned above is fabricated by spin - coating process , the detailed process is as follows : poly ( 3 , 4 - ethylenedioxythiophene )- poly ( styrenesulphonate ) ( pedot : pss ) is spin - coated on the ito glass to form a hole transporting layer with the thickness of 50 nm , and followed by being annealed for 10 min at 120 ° c . then the polymer is dissolved in toluene to prepare toluene solution with the concentration of 10 mg / ml , and subsequently the organic film with the thickness of about 80 nm is prepared at the rotate speed of 2000 r / min the organic film is annealed at 100 ° c . for 15 min . finally , by vacuum evaporation , 1 , 3 , 5 - tris ( 1 - phenyl - 1h - benzo [ d ] imidazol - 2 - yl ) benzene ( tpbi ) ( 40 nm ) used as an material of a electron - transporting layer with the thickness of 40 nm , lif used as an electron - transporting material with the thickness of 1 nm , and al used as a cathode with the thickness of 100 nm are evaporated in sequence onto the ito glass which is coated with light emitting material and is heat - treated . fig6 shows the electroluminescent spectra of the organic electroluminescent device prepared from the present application example at different voltages . as shown in the figure , the emission peaks are mainly dominated by red emission and the intensity of blue emission is weak . the obtained spectra belong to warm white light . the organic electroluminescent device with the structure of ito / pedot : pss ( 50 nm )/ polymer ( 80 nm )/ tpbi ( 40 nm )/ lif ( 1 nm )/ al ( 100 nm ) is fabricated using pf - ir ( piq ) 3 100 obtained from embodiment 4 . the preparation of the device is the same as that of application example 2 . fig7 shows the electroluminescent spectra of the organic electroluminescent device prepared in the present application example at different voltages . as shown in the figure , the electroluminescent spectra cover the range of 410 nm - 780 nm which contains the whole visible light region , and the color coordination is ( 0 . 30 , 0 . 23 ) which is close to the pure white light of ( 0 . 33 , 0 . 33 ). fig8 provides the voltage - luminance curves of the organic electroluminescent devices fabricated in application examples 2 and 3 . as shown in the figure , the turn - on voltage of pf - ir ( piq ) 3 500 is 7 . 5v and the maximum luminance is 492 cd / m 2 ; and the turn - on voltage of pf - ir ( piq ) 3 100 is 7 . 0v and the maximum luminance is 824 cd / m 2 . the organic electroluminescent device with the structure of ito / pedot : pss ( 50 nm )/ polymer ( 80 nm )/ tpbi ( 40 nm )/ ba ( 4 nm )/ al ( 100 nm ) is fabricated using pf - ir ( piq ) 3 50 obtained from embodiment 5 . the preparation of the device is the same as that of application example 2 . the electroluminescent properties of the device are as follows : the turn - on voltage is 7 . 5v , the maximum luminance is 779 cd / m 2 , and the maximum electroluminescent efficiency is 3 . 08 cd / a . the electroluminescent spectra cover the range of 420 nm to 780 nm which contains the whole visible light region . and the color coordination is ( 0 . 28 , 0 . 23 ). the organic electroluminescent device with the structure of ito / pedot : pss ( 50 nm )/ polymer ( 80 nm )/ tpbi ( 40 nm )/ ba ( 4 nm )/ al ( 100 nm ) is fabricated using pf - ir ( piq ) 3 25 obtained from comparative example 1 . the preparation of the device is the same as that of application example 2 . the electroluminescent properties of the device are as follows : the turn - on voltage is 7 . 3v , the maximum luminance is 607 cd / m 2 , and the maximum electroluminescent efficiency is 0 . 99 cd / a . the electroluminescent spectra cover the range of 420 ˜ 780 nm which basically contains the whole visible light ; and the color coordination is ( 0 . 22 , 0 . 19 ). the organic electroluminescent device with the structure of ito / pedot : pss ( 50 nm )/ polymer ( 80 nm )/ tpbi ( 40 nm )/ lif ( 1 nm )/ al ( 100 nm ) is fabricated using pf - ir ( piq ) 2 ( pytzph ) 500 obtained from embodiment 6 . the preparation of the device is the same as that of application example 2 except for the following process . the toluene solution in which the concentration of the polymer is 12 mg / ml is prepared , and then the organic film with the thickness of about 85 nm is prepared at the rotate speed of 2000 r / min . fig9 shows the electroluminescent spectra of the organic electroluminescent device prepared in the present application example at different voltages . as shown in the figure , when the content of red complexes is high , the blue emitting is weak , and the main emission peak is located at the red position of 628 nm . it means that the energy could be efficiently transferred from blue fluorescent materials to red core ; and the color coordination seems slight red which belongs to reddish white light . the organic electroluminescent device with the structure of ito / pedot : pss ( 50 nm )/ polymer ( 80 nm )/ tpbi ( 40 nm )/ lif ( 1 nm )/ al ( 100 nm ) is fabricated using pf - ir ( piq ) 2 ( pytzph ) 50 obtained from embodiment 7 . the preparation of the device is the same as that of application example 5 . the toluene solution in which the concentration of the polymer is 12 mg / ml is prepared , and then the organic film with the thickness of about 85 nm is prepared at the rotate speed of 2000 r / min . fig1 shows the electroluminescent spectra of the organic electroluminescent device prepared from pf - ir ( piq ) 2 ( pytzph ) 50 at different voltages . as shown in the figure , the electroluminescent spectra mainly covers the whole visible light range of 410 nm ˜ 780 nm and the light belongs to bluish white light . fig1 provides the voltage - luminance curves of the organic electroluminescent devices fabricated from pf - ir ( piq ) 2 ( pytzph ) 500 and pf - ir ( piq ) 2 ( pytzph ) 50 . as shown in the figure , the turn - on voltage of pf - ir ( piq ) 2 ( pytzph ) 500 is 8 . 5v , and the maximum luminance thereof is 4039 cd / m 2 ; the turn - on voltage of pf - ir ( piq ) 2 ( pytzph ) 50 is 8 . 0v , and the maximum luminance thereof is 5976 cd / m 2 .