標題: Phosphine-Oxide-Containing Bipolar Host Material for Blue Electrophosphorescent Devices
作者: Hsu, Fang-Ming
Chien, Chen-Han
Shih, Ping-I
Shu, Ching-Fong
應用化學系
Department of Applied Chemistry
公開日期: 1-一月-1970
摘要: "We report highly efficient blue electrophosphorescent organic light-emitting diodes (OLEDs) incorporating a bipolar host, 2,7-bis(diphenylphosphine oxide)-9-(9-phenylcarbazol-3-yl)-9-phenylfluorene (PCF), doped with iridium(III) bis[(4,6-difluorophenyl)pyridinato-NC2']picolinate (FIrpic). PCF, which contains diphenylphosphine oxide groups appended onto a carbazole/fluorene hybrid, displays both electron- and hole-tran sporting characteristics, resulting in a low turn-on voltage (2.6 V) and greatly improved power efficiencies. In addition, the sterically hindered structure of PCF provides a compatible environment for the FIrpic dopant, alleviating concentration quenching of the phosphor at high doping levels. The device doped with 28 wt % FIrpic exhibited maximum EL efficiencies of 30.8 cd/A and 26.2 lm/W (at 121 cd/m(2)) /m(2), Even at a high brightness of 1000 cd/m(2) the efficiencies remained high (26.9 cd/A and 19.6 lm/W)."
URI: http://hdl.handle.net/11536/16688
ISSN: 0897-4756
期刊: CHEMISTRY OF MATERIALS
Volume: 21
Issue: 6
結束頁: 1017
顯示於類別:期刊論文


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  1. 000264310900007.pdf