Long lifetimes white afterglow in slightly crosslinked polymer systems

Qingao Chen, Lunjun Qu, Hui Hou, Jiayue Huang, Chen Li, Ying Zhu, Yongkang Wang, Xiaohong Chen, Qian Zhou, Yan Yang and Chaolong Yang ()
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Qingao Chen: Chongqing University of Technology
Lunjun Qu: Chongqing University of Technology
Hui Hou: Chongqing University of Technology
Jiayue Huang: Chongqing University of Technology
Chen Li: Chongqing University of Technology
Ying Zhu: Chongqing University of Technology
Yongkang Wang: Chongqing University of Technology
Xiaohong Chen: Chongqing University of Technology
Qian Zhou: Chongqing University of Technology
Yan Yang: Chongqing University of Technology
Chaolong Yang: Chongqing University of Technology

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Intrinsic polymer room-temperature phosphorescence (IPRTP) materials have attracted considerable attention for application in flexible electronics, information encryption, lighting displays, and other fields due to their excellent processabilities and luminescence properties. However, achieving multicolor long-lived luminescence, particularly white afterglow, in undoped polymers is challenging. Herein, we propose a strategy of covalently coupling different conjugated chromophores with poly(acrylic acid (AA)-AA-N-succinimide ester) (PAA-NHS) by a simple and rapid one-pot reaction to obtain pure polymers with long-lived RTPs of various colors. Among these polymers, the highest phosphorescence quantum yield of PAPHE reaches 14.7%. Furthermore, the afterglow colors of polymers can be modulated from blue to red by introducing three chromophores into them. Importantly, the acquired polymer TPAP-514 exhibits a white afterglow at room temperature with the chromaticity coordinates (0.33, 0.33) when the ratio of chromophores reaches a suitable value owing to the three-primary-color mechanism. Systematic studies prove that the emission comes from the superposition of different triplet excited states of the three components. Moreover, the potential applications of the obtained polymers in light-emitting diodes and dynamic anti-counterfeiting are explored. The proposed strategy provides a new idea for constructing intrinsic polymers with diverse white-light emission RTPs.

Date: 2024
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DOI: 10.1038/s41467-024-47378-2

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