Dynamical behavior of quantum cutting in alkali gadolinium fluoride phosphors

被引：12

作者：

Kondo, H

Hirai, T

Hashimoto, S

机构：

[1] Ehime Univ, Dept Phys, Matsuyama, Ehime 7908577, Japan

[2] Union Mat Inc, Ibaraki 3001602, Japan

[3] Osaka Womens Univ, Dept Environm Sci, Sakai, Osaka 5900035, Japan

来源：

JOURNAL OF LUMINESCENCE | 2004年 / 108卷 / 1-4期

关键词：

quantum cutting; energy transfer; alkali gadolinium fluoride;

D O I：

10.1016/j.jlumin.2004.01.011

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Time-resolved luminescence spectra have been measured in NaGdF4:Eu3+ in order to investigate quantum cutting in which two visible photons are emitted for one-photon absorption. In a Gd3+-Eu3+ system, two processes of energy transfer from Gd3+ to Eu3+ are dominant in the quantum cutting: a cross-relaxation (CR) process and a direct-transfer (DT) process. In temporal profiles of the luminescence spectra, it was found that. one visible emission undergoing the CR process indicates a fast decay, and the other undergoing the DT process indicates a rising form. These results are explained by two energy-transfer processes contributing to the quantum cutting process. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：59 / 63

页数：5