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.

引用

页码：87 / 90

页数：4

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