FREE AND LOCALIZED EXCITON LUMINESCENCE IN PB1-XCDXI2 MIXED-CRYSTALS

被引：14
|
作者：
WATANABE, M [1 ]
ISHIBASHI, A [1 ]
HAYASHI, T [1 ]
机构：
[1] KYOTO UNIV,COLL GEN EDUC,KYOTO 606,JAPAN
来源：
JOURNAL OF LUMINESCENCE | 1991年 / 48-9卷
关键词：
D O I：
10.1016/0022-2313(91)90081-6
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Luminescence spectra of Pb(1-x)Cd(x)I2 mixed crystals have been investigated under optical excitation at various energies around the absorption edge. The free exciton luminescence of PbI2 is replaced by a broad emission band at the concentration x around 0.03-0.05. The emission is attributed to inhomogeneously broadened luminescence of excitons localized by the fluctuating potential of the disordered alloy. An anomalous shift of exciton transition energy is observed between x = 0.03 and 0.05, which is discussed in relation to the exciton Bohr radius.
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页码：87 / 90
页数：4
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