title: Tuning the optoelectronic properties of 4,4'-N,N'-dicarbazole-biphenyl through heteroatom linkage: new host materials for phosphorescent organic light-emitting diodes.
abstract: Five carbazole end-capped heterofluorenes (CzHFs) designed by structurally mimicking 4,4'-N,N'-dicarbazole-biphenyl (CBP) via connecting the biphenyl core of CBP with the linking atom of C, P, N, O, and S, respectively, were synthesized successfully, and their optoelectronic properties were investigated. The theoretical calculations and experimental results demonstrate that CzHFs are potential green, red, and even blue hosts for phosphorescent light-emitting diodes (PHOLEDs) with more desirable localization and energy levels of HOMO and LUMO and also higher triplet energy than CBP.
authors.affiliation: Key Laboratory for Organic Electronics & Information Displays (KLOEID), Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, China.
authors.forename: Shenglan
authors.initials: S
authors.lastname: Zhang
authors.forename: Runfeng
authors.initials: R
authors.lastname: Chen
authors.forename: Jun
authors.initials: J
authors.lastname: Yin
authors.forename: Feng
authors.initials: F
authors.lastname: Liu
authors.forename: Hongji
authors.initials: H
authors.lastname: Jiang
authors.forename: Naien
authors.initials: N
authors.lastname: Shi
authors.forename: Zhongfu
authors.initials: Z
authors.lastname: An
authors.forename: Cong
authors.initials: C
authors.lastname: Ma
authors.forename: Bin
authors.initials: B
authors.lastname: Liu
authors.forename: Wei
authors.initials: W
authors.lastname: Huang