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Novel bipolar host for highly efficient green, yellow, orange, red and deep-red phosphorescent organic light-emitting devices

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Abstract

A novel bipolar host tris(4-(pyrimidin-5-yl)phenyl)amine (TPMTPA) constructed by incorporating triphenylamine as the electron-donating core and pyrimidine as the electron-accepting peripheries was designed and synthesized. TPMTPA achieves excellent bipolar charge transport properties and has high enough triplet energy level to sensitize green, yellow, orange, red and deep-red phosphors. By using TPMTPA as a host, high performance green, yellow, orange, red and deep-red phosphorescent organic light-emitting devices (PhOLEDs) were demonstrated with maximum external quantum efficiencies of 20.4%, 17.6%, 15.1%, 15.3% and 15.7% respectively. These results suggested that TPMTPA is a versatile high performance host for PhOLEDs of different emission colors.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (51373190).

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Authors and Affiliations

  1. School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu, 610054, China

    Cai-Jun Zheng, Si-Lu Tao & Hui Lin

  2. Nano-organic Photoelectronic Laboratory, Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China

    Cai-Jun Zheng, Chuan-Lin Liu & Kai Wang

  3. Center of Super-Diamond and Advanced Films, Department of Biology and Chemistry, City University of Hong Kong, Hong Kong SAR, China

    Chun-Sing Lee

Authors
  1. Cai-Jun Zheng
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  2. Chuan-Lin Liu
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  3. Kai Wang
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  4. Si-Lu Tao
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  5. Hui Lin
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  6. Chun-Sing Lee
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Correspondence to Cai-Jun Zheng or Chun-Sing Lee.

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Zheng, CJ., Liu, CL., Wang, K. et al. Novel bipolar host for highly efficient green, yellow, orange, red and deep-red phosphorescent organic light-emitting devices. Sci. China Chem. 60, 504–509 (2017). https://doi.org/10.1007/s11426-017-9021-x

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  • DOI: https://doi.org/10.1007/s11426-017-9021-x

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