title: Synthesis and hole-transporting properties of various bicarbazyl derivatives.
abstract: This paper reports a new HTL material that has high glass-transition temperatures (Tg) and excellent thermal properties. The synthesized material was N,N-diethyl-3,3'-bicarbazyl (DEBC), N,N-diphenyl-3,3'-bicarbazyl (DPBC) and N,N-dinaphthyl-3,3'-bicarbazyl (DNBC). The device that used DPBC as HTL showed the highest efficiency of 4.95 cd/A and 2.22 lm/W at 10 mA/cm2. This is an improvement by more than 10% from the luminance efficiency of NPB, a commercialized material.
authors.affiliation: Department of Chemistry, The Catholic University of Korea, Bucheon 420-743, Republic of Korea.
authors.forename: Yoon-Mi
authors.initials: YM
authors.lastname: Lee
authors.forename: Soo-Kang
authors.initials: SK
authors.lastname: Kim
authors.forename: Chang-Jun
authors.initials: CJ
authors.lastname: Lee
authors.forename: Ji-Hoon
authors.initials: JH
authors.lastname: Lee
authors.forename: Jong-Wook
authors.initials: JW
authors.lastname: Park