CATHODOLUMINESCENT PROPERTIES AND ENERGY-TRANSFER IN RED CALCIUM SULFIDE PHOSPHORS (CASEU, MN)

被引：107

作者：

RUELLE, N ^{[1
]}

PHAMTHI, M ^{[1
]}

FOUASSIER, C ^{[1
]}

机构：

[1] UNIV BORDEAUX 1,CNRS,CHIM SOLIDE LAB,F-33405 TALENCE,FRANCE

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1992年 / 31卷 / 9A期

关键词：

LUMINESCENCE; CATHODOLUMINESCENCE; CAS; EU-2+; MN-2+; PHOSPHOR; ENERGY TRANSFER;

D O I：

10.1143/JJAP.31.2786

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Red and orange calcium sulfide phosphors (CaS:Eu and CaS:Mn) were prepared by the flux method. Eu2+ and Mn2+ show strong concentration quenching at 0.1 and 0.8% respectively. Use of the potassium polysulfide flux leads to efficient phosphors; their efficiency reaches 60 and 100%. of Y2O2S:Eu, respectively. Calcium sulfide codoped with Eu and Mn shows a strong increase of Eu2+ in addition to Mn2+ emission. The colour obtained varies between red and orange depending on the concentration rates of Mn and Eu. A luminous efficiency of about 86% was reached for CaS:Eu(0.08%), Mn(0.3%). The decay characteristics of Mn2+ in CaS:Mn, Eu show that the fast part depends on the Eu2+ content. On the other hand, the Eu2+ decay became slower in the presence of Mn2+. These observations support the resonant mechanism of the energy transfer from Mn2+ to Eu2+.

引用

页码：2786 / 2790

页数：5

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