title: Novel benzimidazole derivatives as electron-transporting type host to achieve highly efficient sky-blue phosphorescent organic light-emitting diode (PHOLED) device.
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%.
authors.affiliation: Department of Chemistry and ‡Institute of Polymer Science and Engineering, National Taiwan University , 1 Roosevelt Road Section 4, Taipei 106, Taiwan, R.O.C.
authors.forename: Jau-Jiun
authors.initials: JJ
authors.lastname: Huang
authors.forename: Man-Kit
authors.initials: MK
authors.lastname: Leung
authors.forename: Tien-Lung
authors.initials: TL
authors.lastname: Chiu
authors.forename: Ya-Ting
authors.initials: YT
authors.lastname: Chuang
authors.forename: Pi-Tai
authors.initials: PT
authors.lastname: Chou
authors.forename: Yu-Hsiang
authors.initials: YH
authors.lastname: Hung