journal article·2024-08Open access

Enabling Visible‐Light‐Charged Near‐Infrared Persistent Luminescence in Organics by Intermolecular Charge Transfer

Cunjian Lin, Zishuang Wu, Jumpei Ueda, Rujun Yang, Shihai You, Anqi Lv, Wenting Deng, Qiping Du, Renfu Li, Zhongfu An, Jie Xue, Yixi Zhuang, Rong‐Jun Xie

Advanced Materials· Volume 36· Issue 31

Abstract

Abstract Visible light is a universal and user‐friendly excitation source; however, its use to generate persistent luminescence (PersL) in materials remains a huge challenge. Herein, the concept of intermolecular charge transfer (xCT) is applied in typical host–guest molecular systems, which allows for a much lower energy requirement for charge separation, thus enabling efficient charging of near‐infrared (NIR) PersL in organics by visible light (425–700 nm). Importantly, NIR PersL in organics occurs via the trapping of electrons from charge‐transfer aggregates (CTAs) into constructed trap states with trap depths of 0.63–1.17 eV, followed by the detrapping of these electrons by thermal stimulation, resulting in a unique light‐storage effect and long‐lasting emission up to 4.6 h at room temperature. The xCT absorption range is modulated by changing the electron‐donating ability of a series of acenaphtho[1,2‐b]pyrazine‐8,9‐dicarbonitrile‐based CTAs, and the organic PersL is tuned from 681 to 722 nm. This study on xCT interaction‐induced NIR PersL in organic materials provides a major step forward in understanding the underlying luminescence mechanism of organic semiconductors and these findings are expected to promote their applications in optoelectronics, energy storage, and medical diagnosis.
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Research context

OpenAlex topics: Luminescence and Fluorescent Materials · Organic Light-Emitting Diodes Research · Photochemistry and Electron Transfer Studies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Graduate School of Advanced Science and Technology Japan Advanced Institute of Science and Technology Nomi 923‐1292 Japan

College of Materials and Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials Xiamen University Xiamen 361005 China

Institute of Flexible Electronics (IFE, Future Technologies) Xiamen University Xiamen 361005 China

Research Institute of Frontier Science Southwest Jiaotong University Chengdu Sichuan 610031 China

Key Laboratory of Flexible Electronics and Institute of Advanced Materials Nanjing Tech University Nanjing 211816 China

College of Chemistry and Chemical Engineering Gannan Normal University Ganzhou 341000 China

Graduate School of Human and Environmental Studies Kyoto University Kyoto 606‐8501 Japan

State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 China

School of Microelectronics Shanghai University Shanghai 201800 China

State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen University Xiame 361005 China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Fujian Province

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