Citation: Xiao Lin SUN, Gut Lan ZHANG, Guo Qing TANG, Wen Ju CHEN, Guang Yan HONG, Hong Peng YOU. Photochromism in CaS:Sm[J]. Chinese Chemical Letters, ;1999, 10(2): 185-186. shu

Photochromism in CaS:Sm

a Optical Information Science Laboratory, Institute of Modern Optics, Nankai University, Tianjin, 300071;
b Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022

Received Date: 7 September 1998

Fund Project: This work was sponsored by the National Natural Science Foundation of China

The photochromism in CaS:Sm (from white to pink) was observed for the first time by exposing it to ultraviolet light. The experiments results show that the absorption intensity of Sm²⁺ in the range of 500~600nm was strongly increased after irradiation. valence changing of Sm. If the sample was excited by visible light This reveals that there is the again, the pink color turned to white, indicating that CaS:Sm has potential application in the field of storage material.
- Photochromism,
- CaS:Sm, valence transition, storage material
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