Nature Communications (Nov 2019)

Ultralong UV/mechano-excited room temperature phosphorescence from purely organic cluster excitons

  • Xuepeng Zhang,
  • Lili Du,
  • Weijun Zhao,
  • Zheng Zhao,
  • Yu Xiong,
  • Xuewen He,
  • Peng Fei Gao,
  • Parvej Alam,
  • Can Wang,
  • Zhen Li,
  • Jing Leng,
  • Junxue Liu,
  • Chuanyao Zhou,
  • Jacky W. Y. Lam,
  • David Lee Phillips,
  • Guoqing Zhang,
  • Ben Zhong Tang

DOI
https://doi.org/10.1038/s41467-019-13048-x
Journal volume & issue
Vol. 10, no. 1
pp. 1 – 10

Abstract

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Purely organic ultralong room temperature phosphorescence (URTP) attracts attention but high efficiencies are rarely achieved. Here the authors use ultrafast spectroscopy to investigate a system of 1,8-naphthalic anhydride in organic hosts and reveal that a cluster exciton forms as a transient state before the guest acts as an energy trap for the URTP state.