La3Ga5GeO14:Cr3+ 荧光粉中的近红外长余辉磷光

Near infrared long-persistent phosphorescence in La3Ga5GeO14:Cr3+ phosphor.

作者信息

Yan Wuzhao, Liu Feng, Lu Yi-Ying, Wang Xiao-Jun, Yin Min, Pan Zhengwei

机构信息

Department of Physics and Astronomy & Faculty of Engineering, University of Georgia, Athens, Georgia 30602, USA.

出版信息

Opt Express. 2010 Sep 13;18(19):20215-21. doi: 10.1364/OE.18.020215.

DOI:10.1364/OE.18.020215

PMID:20940912

Abstract

Near infrared (NIR; 660-1300 nm) long-persistent phosphorescence from Cr(3+) ions with persistence time of more than 1 hour was realized in La(3)Ga(5)GeO(14):Cr(3+) phosphor (with or without co-dopants such as Li(+), Zn(2+), Ca(2+), Mg(2+) and Dy(3+)). The NIR phosphorescence can be effectively achieved under UV illumination (~~240-360 nm) but is barely achieved by blue light (~~480 nm) irradiation, even though the blue light excitation are effective to the NIR fluorescence. The NIR phosphorescence mechanisms were discussed by measuring the irradiation energy dependence of the phosphorescence intensity.

摘要

在La(3)Ga(5)GeO(14):Cr(3+)荧光粉（有或没有诸如Li(+)、Zn(2+)、Ca(2+)、Mg(2+)和Dy(3+)等共掺杂剂）中实现了来自Cr(3+)离子的近红外（NIR；660 - 1300 nm）长余辉磷光，其持续时间超过1小时。近红外磷光在紫外光照射（~~240 - 360 nm）下可以有效实现，但即使蓝光（~~480 nm）激发对近红外荧光有效，通过蓝光照射也几乎无法实现。通过测量磷光强度的辐照能量依赖性来讨论近红外磷光机制。