Construction of room temperature phosphorescent materials with ultralong lifetime by in-situ derivation strategy

Qinglong Jia, Xilong Yan, Bowei Wang (), Jiayi Li, Wensheng Xu, Zhuoyao Shen, Changchang Bo, Yang Li and Ligong Chen ()
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Qinglong Jia: Tianjin University
Xilong Yan: Tianjin University
Bowei Wang: Tianjin University
Jiayi Li: Tianjin University
Wensheng Xu: Tianjin University
Zhuoyao Shen: Tianjin University
Changchang Bo: Tianjin University
Yang Li: Tianjin University
Ligong Chen: Tianjin University

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: Abstract Although room temperature phosphorescence (RTP) materials have been widely investigated, it is still a great challenge to improve the performance of RTP materials by promoting triplet exciton generation and stabilization. In this study, an in-situ derivation strategy was proposed to construct efficient RTP materials by in-situ deriving guest molecules and forming a rigid matrix during co-pyrolysis of guest molecules and urea. Characterizations and theoretical calculations revealed that the generated derivatives were beneficial for promoting intersystem crossing (ISC) to produce more triplet excitons, while rigid matrix could effectively suppress the non-radiative transition of triplet excitons. Thus, the in-situ derivation strategy was concluded to simultaneously promote the generation and stabilization of triplet excitons. With this method, the ultralong lifetime of RTP materials could reach up to 5.33 s and polychromatic RTP materials were easily achieved. Moreover, the potential applications of the RTP materials in reprocessing or editable anti-counterfeiting were successfully demonstrated.

Date: 2023
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DOI: 10.1038/s41467-023-39795-6

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