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Red fluorescent siloles with aggregation-enhanced emission characteristics

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  • SPECIAL TOPIC · Molecular Functional Materials and Applications
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Abstract

A series of new red fluorescent siloles consisting of a silole core and dimesitylboranyl substituent connected with a furan, thiophene, and selenophene bridges were synthesized and characterized. The optical properties, electronic structures, and electroluminescence (EL) performances were investigated. The emission wavelengths were red-shifted from the siloles with furan, to those with thiophene, and then selenophene. The thiophene, and selenophene-containing siloles, (MesB)2DTTPS, and (MesB)2DSTPS, showed the typical aggregation-enhanced emission (AEE) feature, while furan-containing one, (MesB)2DFTPS, showed slight emission decrease as the aggregate formation. Theoretical calculations were carried out to explain the difference in the optical properties. Undoped OLEDs using these red siloles as light-emitting layers were fabricated. The device of (MesB)2DTTPS exhibited the best performance. It radiated red EL emission at 589 nm, and afforded good maximum luminance, current, power, and external quantum efficiency of 13300 cd n−2, 4.3 cd A−1, 2.9 lm W−1, and 1.8%, respectively.

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Authors and Affiliations

  1. State Key Laboratory of Luminescent Materials and Devices, Guangzhou, 510640, China

    Bin Chen, Han Nie, Rongrong Hu, Anjun Qin, Zujin Zhao & Ben-Zhong Tang

  2. South China University of Technology, Guangzhou, 510640, China

    Bin Chen, Han Nie, Rongrong Hu, Anjun Qin, Zujin Zhao & Ben-Zhong Tang

  3. Department of Chemistry, Hong Kong University of Science & Technology, Kowloon, Hong Kong, China

    Ben-Zhong Tang

  4. Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Hong Kong, China

    Ben-Zhong Tang

Authors
  1. Bin Chen
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  2. Han Nie
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  3. Rongrong Hu
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  4. Anjun Qin
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  5. Zujin Zhao
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  6. Ben-Zhong Tang
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Corresponding authors

Correspondence to Zujin Zhao or Ben-Zhong Tang.

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Chen, B., Nie, H., Hu, R. et al. Red fluorescent siloles with aggregation-enhanced emission characteristics. Sci. China Chem. 59, 699–706 (2016). https://doi.org/10.1007/s11426-015-0543-3

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  • DOI: https://doi.org/10.1007/s11426-015-0543-3

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