2,5-Dicarbazole-functioned siloles with aggregation-enhanced emission for application in organic light-emitting diodes

Long Chen; Han Nie; Bin Chen; Gengwei Lin; Wenwen Luo; Rongrong Hu; Fei Huang; Anjun Qin; Zujin Zhao; Ben Zhong Tang

doi:10.1117/1.JPE.5.053598

16 December 2015 2,5-Dicarbazole-functioned siloles with aggregation-enhanced emission for application in organic light-emitting diodes

Long Chen, Han Nie, Bin Chen, Gengwei Lin, Wenwen Luo, Rongrong Hu, Fei Huang, Anjun Qin, Zujin Zhao, Ben Zhong Tang

Author Affiliations +

Funded by: National Natural Science Foundation of China, National Basic Research Program of China, Guangdong Natural Science, Guangdong Innovative Research Team Program of China, Fundamental Research Funds for the Central Universities

Journal of Photonics for Energy, Vol. 5, Issue 1, 053598 (December 2015). https://doi.org/10.1117/1.JPE.5.053598

Abstract

2,3,4,5-Tetraarylsiloles are efficient solid-state luminescent materials with good electron-transporting ability. Substitution at the 2,5-positions of silole rings produce various outstanding functional materials that can be used as active layers in organic light-emitting diodes (OLEDs). In this work, two 2,5-dicarbazole-substitued siloles, (2-Cz)₂MTPS and (3-Cz)₂MTPS, are facilely synthesized and fully characterized. Their thermal, photophysical, electrochemical, and electroluminescent properties are investigated systematically. The results show that these 2,5-dicarbazole-functined siloles are thermally stable and feature aggregation-enhanced emission characteristics with high solid-state photoluminescence efficiencies. Nondoped OLEDs [ITO/N,N'-di(1-naphthyl)-N,N'-diphenyl-benzidine (NPB) (60 nm)/emitter (20 nm)/TPBi (40 nm)/LiF (1 nm)/Al (100 nm)] fabricated by adopting (2-Cz)₂MTPS and (3-Cz)₂MTPS as light-emitting layers exhibit good performances, with high luminance of 28240 cd m⁻² and electroluminescence efficiency of 4.5 cd A⁻¹.

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Long Chen, Han Nie, Bin Chen, Gengwei Lin, Wenwen Luo, Rongrong Hu, Fei Huang, Anjun Qin, Zujin Zhao, and Ben Zhong Tang "2,5-Dicarbazole-functioned siloles with aggregation-enhanced emission for application in organic light-emitting diodes," Journal of Photonics for Energy 5(1), 053598 (16 December 2015). https://doi.org/10.1117/1.JPE.5.053598

Published: 16 December 2015

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