Ce3+ energy levels relative to the band structure in CaS:: evidence from photoionization and electron trapping

被引：51

作者：

Jia, D ^{[1
]}

Meltzer, RS ^{[1
]}

Yen, WM ^{[1
]}

机构：

[1] Univ Georgia, Dept Phys & Astron, Athens, GA 30602 USA

来源：

JOURNAL OF LUMINESCENCE | 2002年 / 99卷 / 01期

基金：

美国国家科学基金会;

关键词：

Ca : Ce3+; electron delocalization; electron trapping; photoconductivity; thermoluminescence;

D O I：

10.1016/S0022-2313(02)00326-5

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The energy positions relative to the host valence and conduction bands of the 5d excited states and 4f ground states of Ce3+ in CaS were determined from photoluminescence and photoconductivity measurements. The determination was based on the observation that the 5d electrons of Ce3+ are trapped after transport in the conduction band only when they were excited to the upper 5d-state (E-g), which, therefore, must lie above the minimum of the conduction band of CaS. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：1 / 6

页数：6

共 14 条

[1] Optical and photoelectrical studies of charge-transfer processes in YAlO3:Ti crystals [J].