The Unusual Electrochemical and Photophysical Behavior of 2,2'-Bis(1,3,4-oxadiazol-2-yl)biphenyls, Effective Electron Transport Hosts for Phosphorescent Organic Light Emitting Diodes

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• 作者：Man-kit Leung ; Chih-Chiang Yang ; Jiun-Haw Lee ; Hsin-Hung Tsai ; Chi-Feng Lin ; Chih-Yen Huang ; Yuhlong Oliver Su ; Chi-Feng Chiu
• 刊名：Organic Letters
• 出版年：2007
• 出版时间：January 18, 2007
• 年：2007
• 卷：9
• 期：2
• 页码：235 - 238
• 全文大小：130K
• 年卷期：v.9,no.2(January 18, 2007)
• ISSN：1523-7052

文摘

The fluorescence and phosphorescence of 2,2'-bis(5-phenyl-1,3,4-oxadiazol-2-yl)biphenyl shows good spectral matching with the absorptionspectra of the MLCT¹ and MLCT³ transitions of Ir(ppy)₃. The red-shift of the 0-0 band in the phosphorescence at 77 K is due to the intramolecular- interactions between the oxadiazole side chains. Maximum brightness of 43 000 cd/m² with an efficiency of 26 cd/A at 200 cd/m² wasachieved when BOBP was used as the host material for Ir(ppy)₃ in the PHOLED study.