In conventional organic EL light emitting devices, the ITO used for {HEAD ~ a transparent electrode} has {TAIL ~ a refractive index} of about 2.0 larger than the refractive index of 1.5 of a transparent glass substrate 
In conventional organic EL light emitting devices , the ITO used for { HEAD ~ a transparent electrode } has { TAIL ~ a refractive index } of about 2.0 larger than the refractive index of 1.5 of a transparent glass substrate
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH