title: High-efficiency blue phosphorescent organic light-emitting diodes using a carbazole and carboline-based host material.
abstract: A novel bipolar host 9-(4-(9H-pyrido[2,3-b]indol-9-yl)phenyl)-9H-3,9'-bicarbazole (pBCb2Cz) was prepared for high efficiency blue phosphorescent organic light-emitting diodes (PhOLEDs), a high triplet energy (ET) material, employing electron-deficient α-carboline. pBCb2Cz (ET = 2.93 eV) was effective as a host material for FIrpic- and FCNIrpic-based blue PhOLEDs, and highest quantum efficiencies of 23.0 and 16.2%, respectively, were achieved.
authors.affiliation: Department of Chemistry, Research Institute for Natural Sciences, Korea University, 5 Anam-dong, Sungbuk-Gu, Seoul, 136-701 Republic of Korea.
authors.forename: Sun Jae
authors.initials: SJ
authors.lastname: Kim
authors.forename: Young Jae
authors.initials: YJ
authors.lastname: Kim
authors.forename: Young Hoon
authors.initials: YH
authors.lastname: Son
authors.forename: Jung A
authors.initials: JA
authors.lastname: Hur
authors.forename: Hyun Ah
authors.initials: HA
authors.lastname: Um
authors.forename: Jicheol
authors.initials: J
authors.lastname: Shin
authors.forename: Tae Wan
authors.initials: TW
authors.lastname: Lee
authors.forename: Min Ju
authors.initials: MJ
authors.lastname: Cho
authors.forename: Jung Keun
authors.initials: JK
authors.lastname: Kim
authors.forename: Sunghoon
authors.initials: S
authors.lastname: Joo
authors.forename: Joong Hwan
authors.initials: JH
authors.lastname: Yang
authors.forename: Gee Sung
authors.initials: GS
authors.lastname: Chae
authors.forename: Kihang
authors.initials: K
authors.lastname: Choi
authors.forename: Jang Hyuk
authors.initials: JH
authors.lastname: Kwon
authors.forename: Dong Hoon
authors.initials: DH
authors.lastname: Choi