Photoactivated organic phosphorescence by stereo-hindrance engineering for mimicking synaptic plasticity

He Wang; Yuan Zhang; Chifeng Zhou; Xiao Wang; Huili Ma; Jun Yin; Huifang Shi; Zhongfu An; Wei Huang

doi:10.1038/s41377-023-01132-3

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Photoactivated organic phosphorescence by stereo-hindrance engineering for mimicking synaptic plasticity

Original Articles

- Photoactivated organic phosphorescence by stereo-hindrance engineering for mimicking synaptic plasticity
- Light: Science & Applications Vol. 12, Issue 6, Pages: 972-981(2023)
- Affiliations：
  
  1.Key Laboratory of Flexible Electronics (KLoFE) & Institute of Advanced Materials (IAM), Nanjing Tech University, Nanjing 211800, China
  2.The Institute of Flexible Electronics (IFE, Future Technologies), Xiamen University, Xiamen 361005, China
  3.Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon 999077 Hong Kong, China
  4.State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
  5.Frontiers Science Center for Flexible Electronics (FSCFE), MIIT Key Laboratory of Flexible Electronics (KLoFE), Northwestern Polytechnical University, Xi’an 710072, China
- Author bio：
  
  Huifang Shi (iamhfshi@njtech.edu.cn)
  Zhongfu An (iamzfan@njtech.edu.cn)
  Wei Huang (vc@nwpu.edu.cn)
- Funds：
- DOI：10.1038/s41377-023-01132-3
  CLC：
- Published：30 June 2023，
  
  Published Online：10 April 2023，
  
  Received：29 November 2022，
  
  Revised：12 March 2023，
  
  Accepted：13 March 2023
Scan for full text
Wang, H. et al. Photoactivated organic phosphorescence by stereo-hindrance engineering for mimicking synaptic plasticity. Light: Science & Applications, 12, 972-981 (2023).
DOI：

Wang, H. et al. Photoactivated organic phosphorescence by stereo-hindrance engineering for mimicking synaptic plasticity. Light: Science & Applications, 12, 972-981 (2023). DOI： 10.1038/s41377-023-01132-3.

摘要

Abstract

Purely organic phosphorescent materials with dynamically tunable optical properties and persistent luminescent characteristics enable more novel applications in intelligent optoelectronics. Herein

we reported a concise and universal strategy to achieve photoactivated ultralong phosphorescence at room temperature through stereo-hindrance engineering. Such dynamically photoactivated phosphorescence behavior was ascribed to the suppression of non-radiative transitions and improvement of spin-orbit coupling (SOC) as the variation of the distorted molecular conformation by the synergistic effect of electrostatic repulsion and steric hindrance. This “trainable” phosphorescent behavior was first proposed to mimic biological synaptic plasticity

especially for unique experience-dependent plasticity

by the manipulation of pulse intensity and numbers. This study not only outlines a principle to design newly dynamic phosphorescent materials

but also broadens their utility in intelligent sensors and robotics.

关键词

Keywords

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