Light-Emitting Materials, Devices, and Technologies

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

[+] Author Affiliations
Long Chen, Han Nie, Bin Chen, Gengwei Lin, Wenwen Luo, Rongrong Hu, Fei Huang, Anjun Qin, Zujin Zhao

South China University of Technology, State Key Laboratory of Luminescent Materials and Devices, Guangzhou 510640, China

Ben Zhong Tang

South China University of Technology, State Key Laboratory of Luminescent Materials and Devices, Guangzhou 510640, China

The Hong Kong University of Science and Technology, Department of Chemistry, Clear Water Bay, Kowloon, Hong Kong, China

J. Photon. Energy. 5(1), 053598 (Dec 16, 2015). doi:10.1117/1.JPE.5.053598
History: Received August 20, 2015; Accepted October 16, 2015
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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 28240cdm2 and electroluminescence efficiency of 4.5cdA1.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Long Chen ; Han Nie ; Bin Chen ; Gengwei Lin ; Wenwen Luo, et al.
"2,5-Dicarbazole-functioned siloles with aggregation-enhanced emission for application in organic light-emitting diodes", J. Photon. Energy. 5(1), 053598 (Dec 16, 2015). ; http://dx.doi.org/10.1117/1.JPE.5.053598


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