Solar-blind ultraviolet-C persistent luminescence phosphors

Xianli Wang, Yafei Chen, Feng Liu and Zhengwei Pan ()
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Xianli Wang: University of Georgia
Yafei Chen: King Fahd University of Petroleum and Minerals
Feng Liu: Northeast Normal University
Zhengwei Pan: King Fahd University of Petroleum and Minerals

Nature Communications, 2020, vol. 11, issue 1, 1-8

Abstract: Abstract Visible-light and infrared-light persistent phosphors are extensively studied and are being used as self-sustained glowing tags in darkness. In contrast, persistent phosphors for higher-energy, solar-blind ultraviolet-C wavelengths (200–280 nm) are lacking. Also, persistent tags working in bright environments are not available. Here we report five types of Pr3+-doped silicates (melilite, cyclosilicate, silicate garnet, oxyorthosilicate, and orthosilicate) ultraviolet-C persistent phosphors that can act as self-sustained glowing tags in bright environments. These ultraviolet-C persistent phosphors can be effectively charged by a standard 254 nm lamp and emit intense, long-lasting afterglow at 265–270 nm, which can be clearly monitored and imaged by a corona camera in daylight and room light. Besides thermal-stimulation, in bright environments, photo-stimulation also contributes to the afterglow emission and its contribution can be dominant when ambient light is strong. This study expands persistent luminescence research to the ultraviolet-C wavelengths and brings persistent luminescence applications to light.

Date: 2020
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DOI: 10.1038/s41467-020-16015-z

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