Ultralong organic phosphorescence from isolated molecules with repulsive interactions for multifunctional applications

Xiaokang Yao, Huili Ma, Xiao Wang, He Wang, Qian Wang, Xin Zou, Zhicheng Song, Wenyong Jia, Yuxin Li, Yufeng Mao, Manjeet Singh, Wenpeng Ye, Jian Liang, Yanyun Zhang, Zhuang Liu, Yixiao He, Jingjie Li, Zixing Zhou, Zhu Zhao, Yuan Zhang, Guowei Niu, Chengzhu Yin, Shasha Zhang, Huifang Shi (), Wei Huang () and Zhongfu An ()
Additional contact information
Xiaokang Yao: Nanjing Tech University
Huili Ma: Nanjing Tech University
Xiao Wang: Nanjing Tech University
He Wang: Nanjing Tech University
Qian Wang: Nanjing Tech University
Xin Zou: MIIT Key Laboratory of Flexible Electronics, Northwestern Polytechnical University
Zhicheng Song: Nanjing Tech University
Wenyong Jia: Nanjing Tech University
Yuxin Li: Nanjing Tech University
Yufeng Mao: Nanjing Tech University
Manjeet Singh: Nanjing Tech University
Wenpeng Ye: Nanjing Tech University
Jian Liang: Nanjing Tech University
Yanyun Zhang: Nanjing Tech University
Zhuang Liu: Nanjing Tech University
Yixiao He: Nanjing Tech University
Jingjie Li: Nanjing Tech University
Zixing Zhou: Nanjing Tech University
Zhu Zhao: Nanjing Tech University
Yuan Zhang: Nanjing Tech University
Guowei Niu: Nanjing Tech University
Chengzhu Yin: Nanjing Tech University
Shasha Zhang: Nanjing Tech University
Huifang Shi: Nanjing Tech University
Wei Huang: Nanjing Tech University
Zhongfu An: Nanjing Tech University

Nature Communications, 2022, vol. 13, issue 1, 1-8

Abstract: Abstract Intermolecular interactions, including attractive and repulsive interactions, play a vital role in manipulating functionalization of the materials from micro to macro dimensions. Despite great success in generation of ultralong organic phosphorescence (UOP) by suppressing non-radiative transitions through attractive interactions recently, there is still no consideration of repulsive interactions on UOP. Herein, we proposed a feasible approach by introducing carboxyl groups into organic phosphors, enabling formation of the intense repulsive interactions between the isolated molecules and the matrix in rigid environment. Our experimental results show a phosphor with a record lifetime and quantum efficiency up to 3.16 s and 50.0% simultaneously in film under ambient conditions. Considering the multiple functions of the flexible films, the potential applications in anti-counterfeiting, afterglow display and visual frequency indicators were demonstrated. This finding not only outlines a fundamental principle to achieve bright organic phosphorescence in film, but also expands the potential applications of UOP materials.

Date: 2022
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DOI: 10.1038/s41467-022-32029-1

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