The present invention relates to a photosensitive organic semiconductor composition comprising {HEAD ~ an organic p type semiconductor pigment} with a p type conducting polymer, wherein the ionization potentials of the organic p type semiconductor pigment and {TAIL ~ the p type conducting polymer} are nominally equivalent and a photosensitive organic semiconductor composition comprising an organic n type semiconductor pigment with an n type conducting polymer, wherein the electron affinities of the organic semiconductor pigment and the conducting polymer are nominally equivalent 
The present invention relates to a photosensitive organic semiconductor composition comprising { HEAD ~ an organic p type semiconductor pigment } with a p type conducting polymer , wherein the ionization potentials of the organic p type semiconductor pigment and { TAIL ~ the p type conducting polymer } are nominally equivalent and a photosensitive organic semiconductor composition comprising an organic n type semiconductor pigment with an n type conducting polymer , wherein the electron affinities of the organic semiconductor pigment and the conducting polymer are nominally equivalent
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