16 December 2015 2,5-Dicarbazole-functioned siloles with aggregation-enhanced emission for application in organic light-emitting diodes
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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 28240  cd m−2 and electroluminescence efficiency of 4.5  cd A−1.
© 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
Long Chen, Han Nie, Bin Chen, Gengwei Lin, Wenwen Luo, Rongrong Hu, Fei Huang, Anjun Qin, Zujin Zhao, 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 . Submission:
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