Photoluminescence Properties of Cu+ Centers in MgS, CaS, SrS and BrS
- 1 December 1991
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 30 (12R) , 3335
- https://doi.org/10.1143/jjap.30.3335
Abstract
The detailed emission and excitation spectra and the temperature dependence of the excitation efficiency are obtained for MgS:Cu+, CaS:Cu+, SrS:Cu+ and BaS:Cu+ at various temperatures between 16 and 293 K. In the excitation spectra of all the powder phosphors, two bands assigned to the intraionic transitions in the Cu+ ion are observed. The luminescence mechanism is explained by the isolated Cu+ ion model. The temperature dependence of the excitation efficiency suggests that the Cu+ ion in CaS, SrS and BaS occupies an off-center position of the sulfur octahedron.Keywords
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