Highly efficient fluorene/indole-based hole transport materials for green PhOLEDs
Journal article, 2019

Three hole transport materials, FIPN-p-PCz, FIPN-p-TPA and FIPN-DPCz, incorporating fluorene/indole core with carbazole or triphenylamine unit were synthesized and fully characterized. The photophysical properties, thermal properties and electrochemical properties of these three compounds were fully investigated. The FIPN-based hole transport materials show high thermal stability(Td > 420 °C) and appropriate highest occupied molecular orbital (HOMO) level (∼-5.2 eV). Green phosphorescent organic light-emitting diodes (PhOLEDs) using these FIPN-based derivatives were fabricated to investigate the device performance, compared with NPB as the reference hole transport material. It turned out that the devices using these three compounds exhibited superior performance than that of the NPB-based PhOLED device. Especially, the FIPN-p-PCz based device showed outstanding electroluminescence performance with the maximum current efficiency and external quantum efficiency of 53.7 cd/A and 17.3%, respectively, which was almost twice that of the NPB based device.

Author

Panpan Wu

East China University of Science and Technology

Wenxuan Song

East China University of Science and Technology

Zhenyuan Xia

Institute for organic syntheses and photoreactivity (ISOF-CNR)

Yi Chen

Institute for organic syntheses and photoreactivity (ISOF-CNR)

Guojian Tian

East China University of Science and Technology

Jinhai Huang

Shanghai Taoe Chemical Technology Co., Ltd

Dyes and Pigments

0143-7208 (ISSN) 18733743 (eISSN)

Vol. 162 153-159

Subject Categories

Atom and Molecular Physics and Optics

Theoretical Chemistry

Organic Chemistry

Areas of Advance

Materials Science

DOI

10.1016/j.dyepig.2017.11.017

More information

Latest update

2/18/2021