Colour-tunable ultra-long organic phosphorescence of a single-component molecular crystal

Materials exhibiting long-lived, persistent luminescence in the visible spectrum are useful for applications in the display, information encryption and bioimaging sectors 1 – 4 . Herein, we report the development of several organic phosphors that provide colour-tunable, ultra-long organic phosphores...

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Bibliographic Details
Published in:Nature photonics 2019-06, Vol.13 (6), p.406-411
Main Authors: Gu, Long, Shi, Huifang, Bian, Lifang, Gu, Mingxing, Ling, Kun, Wang, Xuan, Ma, Huili, Cai, Suzhi, Ning, Weihua, Fu, Lishun, Wang, He, Wang, Shan, Gao, Yaru, Yao, Wei, Huo, Fengwei, Tao, Youtian, An, Zhongfu, Liu, Xiaogang, Huang, Wei
Format: Article
Language:English
Subjects:
639/301/1019
639/624/399
Applied and Technical Physics
Color
Emissions
Encryption
Letter
Medical imaging
Phosphorescence
Phosphors
Physics
Physics and Astronomy
Quantum Physics
Smart sensors
Ultraviolet radiation
Visible spectrum
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Summary:Materials exhibiting long-lived, persistent luminescence in the visible spectrum are useful for applications in the display, information encryption and bioimaging sectors 1 – 4 . Herein, we report the development of several organic phosphors that provide colour-tunable, ultra-long organic phosphorescence (UOP). The emission colour can be tuned by varying the excitation wavelength, allowing dynamic colour tuning from the violet to the green part of the visible spectrum. Our experimental data reveal that these organic phosphors can have an ultra-long lifetime of 2.45 s and a maximum phosphorescence efficiency of 31.2%. Furthermore, we demonstrate the applications of colour-tunable UOP for use in a multicolour display and visual sensing of ultraviolet light in the range from 300 to 360 nm. The findings open the opportunity for the development of smart luminescent materials and sensors with dynamically controlled phosphorescence. Organic phosphors with ultra-long lifetimes and an emission colour that can be tuned by the excitation wavelength are reported.
ISSN:1749-4885
1749-4893
DOI:10.1038/s41566-019-0408-4