摘要
本文介绍用高温固相扩散方法制备M_yM′_(1-y)FCl_xBr_(1-x):Sm^(2+)(M′=Mg、Ca、Sr、Ba;x,y=1,0.8,…,0),并对这些系列材料发光性质进行了研究.结果表明:非均匀线宽主要受材料中阴离子随机分布影响;材料中x的变化及M,M′的不同或y的变化,对Sm^(2+)的4f^55d能级位置都有影响;对于BaFCl_xBr_(1-x):Sm^(2+)和Sr_yCa_(1-y)FCl_(0.5)Br_(0.5):Sm^(2+)系列材料~5D_0—~7F_0发射峰值与x、y值关系给予了理论解释;选择出较好的光谱烧孔材料Mg_(0.5)Sr_(0.5)FCl_(0.5)Br_(0.5):Sm^(2+),研究了其热猝灭规律,实现了这种材料在77K下的光谱烧孔,对其孔深、孔宽、烧孔能级、存储密度进行了测量计算,为进一步改善材料,研究烧孔机制提供了依据.
were prepared by high temperature solid state action. Their spectral characteristics was studied. It is found that the inhomogeneous line width of Sm2+ emission is dominated by the nearest anion distribution. The 4f5d energy levels of Sm2+ were shifted with varying x or y. The relationship between the emission peak of 5D0-7F0 in BaFCIxBr-x Sm2 + and x was obtained and analysed. Considering the ratio of in-homogenous line width and other properties, we found that Mg0.5Sr0.6 FCl0.5Br0.5:Sm2+ is suitable for frequency domain optical storge. Its temperature quenching was also studied. Photon-gated spectral hole burning was observed in Mg0.5Sr0.5FCl0.5Br0.5:Sm2 + and Ba0.5Sr0.5 FCl0.5Br0.5:Sm2+ at 77K.
出处
《发光学报》
EI
CAS
CSCD
北大核心
1991年第1期19-25,共7页
Chinese Journal of Luminescence
基金
国家科委863项目资助
