期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 42, 期 22, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/42/22/225103
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Simple high efficiency red phosphorescent organic light-emitting diodes (PHOLEDs) without any electron injection layer were developed using a phosphine oxide derivative as a triplet host and electron transport material. Electrons could be directly injected from the Al cathode to the phosphine oxide type material. A high quantum efficiency of 12.5% and a high power efficiency of 12.7 lmW(-1) were achieved in the red PHOLEDs without any electron injection layer. In addition, the red PHOLED without any electron transport and electron injection layer also showed a high quantum efficiency of 10.5% and a power efficiency of 10.2 lmW(-1).
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