Fig. 7From: Efficient Trilayer Phosphorescent Organic Light-Emitting Devices Without Electrode Modification Layer and Its Working Mechanisma Current density–voltage–luminance (J-V-L) curves of the WOLEDs. b Current efficiency–luminance–external quantum efficiency (CE-L-EQE) curves. c Normalized EL spectra of the white OLEDs. The orange arrow shows the weakened spectra versus applied voltageBack to article page