Solution processed high efficiency blue and white phosphorescent organic light-emitting diodes using a high triplet energy exciton blocking layer

High efficiency solution processed blue and white phosphorescent organic light-emitting diodes (PHOLEDs) were developed using diphenylphosphine oxide-4-(triphenylsilyl)phenyl (TSPO1) as a high triplet energy exciton blocking layer. The solution processed blue and white PHOLEDs showed a high quantum efficiency of 19.4% at 20 cd/m2 and 12.3% at 119 cd/m2, respectively, due to the efficient hole and exciton blocking of TSPO1.

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► High quantum efficiency of 19.4% in solution processed blue phosphorescent device.
► High quantum efficiency of 12.3% in solution processed white phosphorescent device.
► High triplet energy exciton blocking layer for solution processed phosphorescent device.