Study of energy transfer between rare earth ions in CaS host by photoluminescence spectra

When CaS:Sm 3+, Eu 2+ is excited at 476.5 nm (Ar +), the emission spectra taken at room temperature and at 77 K are different, indicating that there are two competitive energy transfer processes—Sm 3+→Eu 2+ and Eu 2+→Sm 3+ with phonon participation. So, the luminescence intensity of Sm 3+ increases...

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Bibliographic Details
Published inThe Journal of physics and chemistry of solids Vol. 62; no. 4; pp. 807 - 810
Main Authors Xiaolin, Sun, Guangyan, Hong, Xinyong, Dong, Dong, Xiao, Guilan, Zhang, Guoqing, Tang, Wenju, Chen
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 01.04.2001
Elsevier
Subjects
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Other solid inorganic materials
Photoluminescence
Physics
Temperature dependence
Inorganic compounds
Impurity density
Calcium sulfides
Phonons
Photoluminescence
Doped materials
Experimental study
Europium additions
Energy-level transitions
Samarium additions
Impurity states
Energy transfer
Codoping
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Summary:When CaS:Sm 3+, Eu 2+ is excited at 476.5 nm (Ar +), the emission spectra taken at room temperature and at 77 K are different, indicating that there are two competitive energy transfer processes—Sm 3+→Eu 2+ and Eu 2+→Sm 3+ with phonon participation. So, the luminescence intensity of Sm 3+ increases first, and then decreases as the concentration of Eu 2+ is increasing.
ISSN:0022-3697
1879-2553
DOI:10.1016/S0022-3697(00)00266-3