摘要
本文研究了ＭｇＢ４Ｏ７中Ｃｅ３＋、Ｍｎ２＋光致发光性质与浓度的关系，并讨论了Ｃｅ３＋→Ｍｎ２＋能量传递的机理。
In this paper, We have investigated the dependence of Ce3+ and Mn2+ photoluminescent properties on compostion and the sensitization of Mn2+ emission with Ce3+.Under the excitation of 254nm UV light, Ce3+emission bands lie in the region between 280and 480nm. Because the excitation spectrum of Ce3+contains several strong bands between210 and 300nm, so Ce3+can absorb the excitation energy and may be a good sensitizer. Mn2+emission band lies at 590nm (halfwidth～82nm). The excitation spectrum of Mn2+ containsseveral bands between 300 and 500nm. Mn2+emission in MgB4O7 is well sensitized by Ce3+.From the data of spectra which vary with composition and Dexter's energy transfer theory,we may conclude that the electric dipole-dipole interaction of the resonance transter is thepredominant mechanism for energy transfer from Ce3+to Mn2+ions.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
1994年第3期9-12,22,共5页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金
关键词
光致发光
能量传递
硼酸镁
锰
铈
MgB4O7, Ce3+, Mn2+, Photoluminescence, Energy transfer
