標題: High morphology stability and ambipolar transporting host for use in blue phosphorescent single-layer organic light-emitting diodes
作者: Hsu, Fang-Ming
Chien, Liang-Jung
Chen, Kuan-Ting
Li, Ya-Ze
Liu, Shun-Wei
應用化學系
Department of Applied Chemistry
關鍵字: Single layer;Phosphorescent materials;Organic light-emitting diode;Ambipolar host;Morphological stability;Recombination zone
公開日期: 1-十一月-2014
摘要: The authors report a small molecule host of 2,7-bis(diphenylphosphoryl)-9-[4-(N, N-diphenylamino)phenyl]-9-phenylfluorene (POAPF) doped with 8 wt% iridium(III)-bis[(4,6-difluorophenyl)pyridinato-N,C-2\']picolinate (FIrpic) for use in efficient and single-layer blue phosphorescent organic light-emitting diodes (PHOLEDs) exhibiting a maximum external quantum efficiency of similar to 20.3% at brightness of 100 cd/m(2). The high performance of such single layer PHOLEDs is attributed to the POAPF host\'s high morphological stability, suitable triplet energy level, and equal charge carrier mobilities of hole and electron to form the broad carrier recombination zone in the emitting layer, thus reducing the triplet-triplet annihilation and resulting in a slight efficiency roll off of 0.5% from the brightness of 1 and 1000 cd/m(2). This work also systematically investigated the arrangement of the POAPF:FIrpic recombination zone for optimizing the performance of the single layer PHOLED. (C) 2014 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.orgel.2014.09.009
http://hdl.handle.net/11536/123954
ISSN: 1566-1199
DOI: 10.1016/j.orgel.2014.09.009
期刊: ORGANIC ELECTRONICS
Volume: 15
Issue: 11
起始頁: 3327
結束頁: 3332
顯示於類別:期刊論文


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  1. 000344424500087.pdf