White light emission from a single organic molecule with dual phosphorescence at room temperature

Zikai He, Weijun Zhao, Jacky W. Y. Lam, Qian Peng (), Huili Ma, Guodong Liang, Zhigang Shuai and Ben Zhong Tang ()
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Zikai He: The Hong Kong University of Science and Technology
Weijun Zhao: The Hong Kong University of Science and Technology
Jacky W. Y. Lam: The Hong Kong University of Science and Technology
Qian Peng: Chinese Academy of Sciences
Huili Ma: Tsinghua University
Guodong Liang: Sun Yat-Sen University
Zhigang Shuai: Tsinghua University
Ben Zhong Tang: The Hong Kong University of Science and Technology

Nature Communications, 2017, vol. 8, issue 1, 1-8

Abstract: Abstract The development of single molecule white light emitters is extremely challenging for pure phosphorescent metal-free system at room temperature. Here we report a single pure organic phosphor, namely 4-chlorobenzoyldibenzothiophene, emitting white room temperature phosphorescence with Commission Internationale de l’Éclair-age coordinates of (0.33, 0.35). Experimental and theoretical investigations reveal that the white light emission is emerged from dual phosphorescence, which emit from the first and second excited triplet states. We also demonstrate the validity of the strategy to achieve metal-free pure phosphorescent single molecule white light emitters by intrasystem mixing dual room temperature phosphorescence arising from the low- and high-lying triplet states.

Date: 2017
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DOI: 10.1038/s41467-017-00362-5

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