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Optoelectronics Letters

, Volume 13, Issue 2, pp 116–119 | Cite as

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

  • Hui-shan Yang (杨惠山)
  • Hui-yu Guo (郭慧瑜)
  • Li-shuang Wu (吴丽双)
Article

Abstract

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 reduce the triplet-triplet annihilation and improve the efficiency of the device.

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Copyright information

© Tianjin University of Technology and Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Hui-shan Yang (杨惠山)
    • 1
  • Hui-yu Guo (郭慧瑜)
    • 1
  • Li-shuang Wu (吴丽双)
    • 1
  1. 1.College of Physics and Information EngineeringQuanzhou Normal UniversityQuanzhouChina

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