II-VI COMPOUNDS CODOPED WITH TRANSITION-METALS AND RARE-EARTHS

被引：6
作者：
HOMMEL, D
HARTMANN, H
BUSSE, W
GUMLICH, HE
KREISSL, J
机构：
[1] ZENTRUM WISSENSCH GERATEBAU, W-1199 BERLIN, GERMANY
[2] TECH UNIV BERLIN, INST FESTKORPERPHYS, W-1000 BERLIN 12, GERMANY
来源：
JOURNAL OF LUMINESCENCE | 1991年 / 48-9卷
关键词：
D O I：
10.1016/0022-2313(91)90213-F
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Single crystals of ZnS codoped with both Mn2+ and Sm3+ have been studied using time resolved spectroscopy, site selective and decay time measurements. The results obtained on differently prepared samples are compared with the findings observed on ZnS bulk crystals doped either with manganese or samarium. The dominating sites and energy transfer processes are discussed. EPR measurements on the Mn2+ sites lead to the conclusion that crystals codoped with Li+ are less strained compared to those doped with Sm3+ and Mn2+ only. The stability of the luminescent centers has been verified in a host lattice damaged by Ar-implantation. A new energy transfer channel has been found in the codoped samples giving rise to a very slow Sm3+ decay component of 5 ms. Mn diffusion into a ZnS:Sm,Li crystal provides to the formation of Sm-Mn complexes characterized by shorter Sm3+ decay times.
引用
收藏
页码：655 / 660
页数：6
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