Enhancement of green emission from Tb3+:GdOBr phosphors with Ce3+ ion co-doping

被引：56

作者：

Cheng, SD ^{[1
]}

Kam, CH ^{[1
]}

Buddhudu, S ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Elect & Elect Engn, Microelect Div, Photon Res Grp, Singapore 639798, Singapore

来源：

MATERIALS RESEARCH BULLETIN | 2001年 / 36卷 / 5-6期

关键词：

optical materials; chemical synthesis; luminescence;

D O I：

10.1016/S0025-5408(01)00587-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A strong green emission ((D4 -->F5)-D-5-F-7) has been observed from Tb3+ (1.0 mol%) doped into GdOBr powder phosphors upon excitation with an UV-wavelength (226 nm). To this phosphor, different amounts of Ce3+ (from 0.1 to 1.5 mol%) have been added to further improve the green emission efficiency of Tb3+-doped GdOBr. It has been found that the optimum concentration, 0.2 mol% of Ce3+ results in a twofold enhancement of the green emission intensity. The green emission from Tb3+ could not be increased at higher Ce3+ concentrations due to the Ce3+-Ce3+ ion interactions, i.e., the concentration quenching effect. The mechanism involved in the energy transfer between the Ce3+ and Tb3+ has been explained with an energy level diagram. (C) 2001 Elsevier Science Ltd. Al rights reserved.

引用

页码：1131 / 1137

页数：7

共 20 条

[1] Ce3+ or Tb3+-doped phosphate and silicate scintillating glasses [J].