Jump to main content
Jump to site search


Control of π–π stacking in carbazole-benzimidazo〈1,2-f〉phenanthridines: the design of electron-transporting bipolar hosts for phosphorescent organic light-emitting diodes

Author affiliations

Abstract

Two bipolar hosts, 8-cbzBIFP and 10-cbzBIFP, both with basic skeletons of orthogonally-connected carbazole and benzimidazo〈1,2-f〉phenanthridine (BIFP) have been prepared. The planar structure of the BIFP moiety governs the molecular stacking in the crystal lattice. Electron transport properties, in comparison to the benzimidazole derivatives, are facilitated. Both hosts display fabulous performances in phosphorescent organic light-emitting diodes with bis(2-phenylpyridine)(acetylacetonate)iridium(III) as an emitter. The optimized green PhOLED of 10-cbzBIFP achieves the maximum brightness (Lmax) of 58 810 cd m−2, the maximum current efficiency (ηc) of 87.0 cd A−1 and external quantum efficiency (EQE) of 21.1%. Likewise, 8-cbzBIFP shows an Lmax of 58 870 cd m−2, ηc of 77.3 cd A−1 and EQE of 19.1%.

Graphical abstract: Control of π–π stacking in carbazole-benzimidazo〈1,2-f〉phenanthridines: the design of electron-transporting bipolar hosts for phosphorescent organic light-emitting diodes

Back to tab navigation

Supplementary files

Article information


Submitted
30 Nov 2019
Accepted
17 Jan 2020
First published
20 Jan 2020

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

Control of π–π stacking in carbazole-benzimidazo〈1,2-f〉phenanthridines: the design of electron-transporting bipolar hosts for phosphorescent organic light-emitting diodes

Y. Chen, C. Chen, C. Chang, B. Fan, D. Chen, J. Lee, T. Chiu, P. Chou and M. Leung, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/C9TC06550D

Social activity

Search articles by author

Spotlight

Advertisements