Issue 31, 2014

A rational design of carbazole-based host materials with suitable spacer group towards highly-efficient blue phosphorescence

Abstract

Two novel carbazole derivatives, 3,3′-(2,6-dimethyl-1,4-phenylene)bis(9-phenyl-9H-carbazole) (DMCz) and 3,3′-(2,3,5,6-tetramethyl-1,4-phenylene)bis(9-phenyl-9H-carbazole) (TMCz), are designed and synthesized as host materials for blue phosphorescent organic light emitting diodes (PHOLEDs). Both the materials possess sufficiently high glass transition temperatures and triplet energies for the blue dopant Ir-complex iridium(III) bis(4,6-(difluorophenyl)-pyridinato-N,C′)picolinate (FIrpic, 2.65 eV). The device using DMCz as the host material showed a better performance than that of TMCz with a maximum power efficiency of 36.0 ± 0.7 lm per W, a maximum current efficiency of 43.7 ± 0.6 cd per A and a maximum external quantum efficiency (EQE) of 18.5 ± 0.1%.

Graphical abstract: A rational design of carbazole-based host materials with suitable spacer group towards highly-efficient blue phosphorescence

Supplementary files

Article information

Article type
Paper
Submitted
29 Apr 2014
Accepted
05 Jun 2014
First published
12 Jun 2014

J. Mater. Chem. C, 2014,2, 6387-6394

A rational design of carbazole-based host materials with suitable spacer group towards highly-efficient blue phosphorescence

X. Yuan, J. Liang, Y. He, Q. Li, C. Zhong, Z. Jiang and L. Liao, J. Mater. Chem. C, 2014, 2, 6387 DOI: 10.1039/C4TC00867G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements