High performance inverted top-emitting organic light-emitting diodes with enhanced intrinsic quantum yield

被引：0
|
作者：
YukunWu [1 ]
Guo, Runda [1 ]
Wang, Hongbo [1 ]
Zhang, Zhensong [1 ]
Zhao, Yi [1 ]
机构：
[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130012, Jilin Province, Peoples R China
来源：
ORGANIC LIGHT EMITTING MATERIALS AND DEVICES XIX | 2015年 / 9566卷
关键词：
ITOLED; BEOLED; intrinsic quantum yield; low efficiency roll-off; EFFICIENCY; PHOSPHORESCENCE;
D O I：
10.1117/12.2187245
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Inverted top-emitting organic light-emitting diodes (ITOLEDs) with aluminum as cathode and semitransparent silver as anode are investigated. Comparing the blue, green and red ITOLEDs with conventional BEOLEDs based on iridium complex, it is surprising that the red ITOLED exhibits a higher efficiency nearly twice as that of the bottom-emitting counterpart, while blue and green ITOLEDs are comparable to BEOLEDs. We explain that the role of the strong microcavity effect improved the spontaneous emission of emitters in all ITOLEDs, however, only the intrinsic quantum yield of the red emitters is improved due to its comparable radiative and nonradiative decay rates.
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页数：6
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