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