Controllably tunable phenanthroimidazole–carbazole hybrid bipolar host materials for efficient green electrophosphorescent devices

Hong Huang; Yixing Wang; Bo Wang; Shaoqing Zhuang; Biao Pan; Xiao Yang; Lei Wang; Chuluo Yang

doi:10.1039/C3TC30832D

Controllably tunable phenanthroimidazole–carbazole hybrid bipolar host materials for efficient green electrophosphorescent devices

Hong Huang,^a Yixing Wang,^a Bo Wang,^a Shaoqing Zhuang,^a Biao Pan,^a Xiao Yang,^a Lei Wang*^a and Chuluo Yang*^ab

* Corresponding authors

^a Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
E-mail: wanglei@mail.hust.edu.cn

^b Department of Chemistry, Wuhan University, Wuhan 430072, P. R. China
E-mail: clyang@whu.edu.cn

Abstract

A series of phenanthroimidazole–carbazole (1 : 2) hybrids as bipolar host materials have been designed and synthesized through facile typical Ullmann reactions. These compounds with rigid configurations exhibit excellent thermal and morphological stabilities with high glass transition temperatures (T_g) (143–282 °C). Their photoelectronic properties, energy levels, charge transport mobility, and film morphologies can be controllably tuned through judicious engineering of the linkage modes between the two carbazole groups and the 2,5-diphenyl-1,3,4-phenanthroimidazole (para and meta). The promising physical properties of these new compounds make them suitable for use as hosts doped with Ir-based phosphor for realizing highly efficient phosphorescent organic light emitting diodes (PhOLEDs). A green device hosted by compound PhBIDmpCP shows a maximum current efficiency of 74.3 cd A⁻¹ and a maximum power efficiency of 74.4 lm W⁻¹ (corresponding EQE_max = 20.2%).

Article information

https://doi.org/10.1039/C3TC30832D

Article type

Paper

Submitted

02 May 2013

Accepted

23 Jul 2013

First published

23 Jul 2013

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J. Mater. Chem. C, 2013,1, 5899-5908

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Controllably tunable phenanthroimidazole–carbazole hybrid bipolar host materials for efficient green electrophosphorescent devices

H. Huang, Y. Wang, B. Wang, S. Zhuang, B. Pan, X. Yang, L. Wang and C. Yang, J. Mater. Chem. C, 2013, 1, 5899 DOI: 10.1039/C3TC30832D

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Journal of Materials Chemistry C

Controllably tunable phenanthroimidazole–carbazole hybrid bipolar host materials for efficient green electrophosphorescent devices

Abstract

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Controllably tunable phenanthroimidazole–carbazole hybrid bipolar host materials for efficient green electrophosphorescent devices

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