Green phosphorescent organic light-emitting devices based on different electron transport layers combining with fluorescent sub-monolayer

We report a small molecule host of 4,4（-N,N）-dicarbazole-biphenyl（CBP） doped with 8% tris（2-phenylpyridine） iridium（Irppy3） for use in efficient green phosphorescent organic light-emitting devices（PHOLEDs） combined with different electron transport layers of Alq and BAlq. The PHOLEDs exhibit maximum...

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Bibliographic Details
Published in:Optoelectronics letters 2017-03, Vol.13 (2), p.116-119
Main Author: 杨惠山 郭慧瑜 吴丽双
Format: Article
Language:English
Subjects:
Carrier recombination
Charge efficiency
Current carriers
Current efficiency
Devices
Electron transport
Fluorescence
Iridium
Lasers
Monolayers
Optical Devices
Optics
Organic light emitting diodes
Phosphorescence
Photonics
Physics
Physics and Astronomy
Power efficiency
亚单层
层结
有机发光器件
有机电致发光器件
电子传输层
磷光
荧光
载流子迁移率
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Summary:We report a small molecule host of 4,4（-N,N）-dicarbazole-biphenyl（CBP） doped with 8% tris（2-phenylpyridine） iridium（Irppy3） for use in efficient green phosphorescent organic light-emitting devices（PHOLEDs） combined with different electron transport layers of Alq and BAlq. The PHOLEDs exhibit maximum current efficiency and power efficiency of 19.8 cd/A and 6.21 lm/W, respectively. The high performance of such PHOLEDs is attributed to the better electron mobile ability of BAlq and sub-monolayer quinacridone（QAD） as carrier trapping layer and equal charge carrier mobilities of hole and electron to form the broad carrier recombination zone in the emitting layer, which can 1reduce the triplet-triplet annihilation and improve the efficiency of the device.
ISSN:1673-1905
1993-5013
DOI:10.1007/s11801-017-6282-8