Organic photostimulated luminescence associated with persistent spin-correlated radical pairs

Photostimulated luminescence allows energy or data to be stored and released using electromagnetic waves as both the input and output, and has attracted considerable interest in the fields of biomedical and information technologies. However, this phenomenon is mostly limited to solid inorganic mater...

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Bibliographic Details
Published in:Communications materials 2021-07, Vol.2 (1), p.1-7, Article 74
Main Authors: Sakurai, Manabu, Kabe, Ryota, Fuki, Masaaki, Lin, Zesen, Jinnai, Kazuya, Kobori, Yasuhiro, Adachi, Chihaya, Tachikawa, Takashi
Format: Article
Language:English
Subjects:
639/301/1019
639/638/439
Biomedical materials
Chemistry and Materials Science
Display devices
Electromagnetic radiation
Emitters
Infrared radiation
Inorganic materials
Light irradiation
Luminescence
Materials Science
Ultraviolet radiation
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Summary:Photostimulated luminescence allows energy or data to be stored and released using electromagnetic waves as both the input and output, and has attracted considerable interest in the fields of biomedical and information technologies. However, this phenomenon is mostly limited to solid inorganic materials. Here, we report photostimulated luminescence from purely organic blend films, composed of electron donor, acceptor, and trap/emitter molecules. Charges in the films are accumulated as radical ions by ultraviolet light irradiation and then extracted by near-infrared light irradiation. Even after storage in the dark for one week they produce visible light with good repeatability, color tunability, and are responsive to weak external magnetic fields. These findings might broadly impact existing applications and provide new prospects for innovative flexible devices. Materials that display photostimulated luminescence are attractive for multiple applications. Here, photostimulated luminescence is demonstrated in an all-organic blend film, in which a dopant molecule functions as both an electron trap and a light emitter.
ISSN:2662-4443
2662-4443
DOI:10.1038/s43246-021-00178-3