Building bridges through dynamic coupling for organic phosphorescence

Xin Li, Wenlang Li, Ziqi Deng, Jingtian Wang, Shan He, Xinwen Ou, David Lee Phillips, Guanjun Xiao (), Bo Zou, Ryan T. K. Kwok, Jianwei Sun, Jacky W. Y. Lam (), Zhihong Guo () and Ben Zhong Tang ()
Additional contact information
Xin Li: Clear Water Bay
Wenlang Li: Clear Water Bay
Ziqi Deng: The University of Hong Kong
Jingtian Wang: Jilin University
Shan He: Clear Water Bay
Xinwen Ou: Clear Water Bay
David Lee Phillips: The University of Hong Kong
Guanjun Xiao: Jilin University
Bo Zou: Jilin University
Ryan T. K. Kwok: Clear Water Bay
Jianwei Sun: Clear Water Bay
Jacky W. Y. Lam: Clear Water Bay
Zhihong Guo: Clear Water Bay
Ben Zhong Tang: Clear Water Bay

Nature Communications, 2025, vol. 16, issue 1, 1-12

Abstract: Abstract Achieving long-lived room temperature phosphorescence (RTP) in organic materials has garnered significant attention in the field of optoelectronics. Although many host−guest systems with versatile performances have been developed, their photophysical mechanisms remain unclear due to the complicated intermolecular interactions and multiple energy transfer pathways, leading to unavoidable trial-and-error in molecular designs. Here we reveal that the dynamic coupling process in the excited state is crucial for inducing phosphorescence, where host and guest molecules firstly couple to enhance the intersystem crossing efficiency, and then decouple to transfer excitons to the triplet state of guest. Such a process shows universal applicability and tunable performance, with the longest lifetime for red RTP (τP = 2.4 s) reported so far. We anticipate the present work as a starting point for more sophisticated models on excited-state dynamic behaviors within host−guest systems.

Date: 2025
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DOI: 10.1038/s41467-025-61714-0

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