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Novel benzimidazole derivatives as electron-transporting type host to achieve highly efficient sky-blue
Jau-Jiun Huang1, Man-Kit Leung, Tien-Lung Chiu
1Department of Chemistry and ‡Institute of Polymer Science and Engineering, National Taiwan University , 1 Roosevelt Road Section 4, Taipei 106, Taiwan, R.O.C.
Abstract:
The development of benzimidazole substituted biphenyls as electron-transporting hosts for bis[2-(4,6-difluorophenyl)pyridinato-C(2),N](picolinato)iridium(III) is reported. Under the optimized conditions, the organic light-emitting diode (OLED) achieves the maximum current efficiency of 57.2 cd/A, power efficiency of 50.4 lm/W, and external quantum efficiency 25.7%.
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