title: Orthogonally Substituted Benzimidazole-Carbazole Benzene As Universal Hosts for Phosphorescent Organic Light-Emitting Diodes.
abstract: The novel ambipolar hosts of o-CbzBz and o-DiCbzBz contain carbazole and benzimidazole through an ortho-connection. The orthogonal conformations cause the triplet state to be confined at the carbazole units to secure efficient energy transfer. The phosphorescent organic light-emitting diodes (PhOLEDs) show a high current efficiency, power efficiency, and low efficiency roll-off. o-DiCbzBz can be used as a host for sky-blue, green, and orange-red PhOLEDs, giving 57.5, 78.4, and 60.3 cd/A, respectively.
authors.forename: Jau-Jiun
authors.initials: JJ
authors.lastname: Huang
authors.affiliation: Department of Photonics Engineering, Yuan Ze University , 135 Yuan-Tung Road, Taoyuan 32003, Taiwan, R.O.C.
authors.forename: Yu-Hsiang
authors.initials: YH
authors.lastname: Hung
authors.forename: Pei-Ling
authors.initials: PL
authors.lastname: Ting
authors.forename: Yu-Ning
authors.initials: YN
authors.lastname: Tsai
authors.affiliation: Department of Photonics Engineering, Yuan Ze University , 135 Yuan-Tung Road, Taoyuan 32003, Taiwan, R.O.C.
authors.forename: Huan-Jie
authors.initials: HJ
authors.lastname: Gao
authors.affiliation: Department of Photonics Engineering, Yuan Ze University , 135 Yuan-Tung Road, Taoyuan 32003, Taiwan, R.O.C.
authors.forename: Tien-Lung
authors.initials: TL
authors.lastname: Chiu
authors.forename: Jiun-Haw
authors.initials: JH
authors.lastname: Lee
authors.forename: Chi-Lin
authors.initials: CL
authors.lastname: Chen
authors.forename: Pi-Tai
authors.initials: PT
authors.lastname: Chou
authors.forename: Man-kit
authors.initials: MK
authors.lastname: Leung