Charge separation of excitons and the radiative recombination process in PbBr2 crystals

被引：37

作者：

Iwanaga, M ^{[1
]}

Watanabe, M

Hayashi, T

机构：

[1] Kyoto Univ, Grad Sch Human & Environm Studies, Kyoto 6068501, Japan

[2] Kyoto Univ, Fac Integrated Human Studies, Kyoto 6068501, Japan

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.62.10766

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The photoluminescence (PL) properties at low temperatures have been investigated in PbBr2 crystals. We find that the blue-green PL band at 2.55 eV (BG band) originates from the intrinsic relaxed state of excitons. The analysis of the decay curve of the BG band reveals that the excitons relax into charge-separated pairs of a self-trapped electron and a self-trapped hole. The relaxation of an exciton results from the repulsive correlation between the electron and hole through acoustic phonons.

引用

页码：10766 / 10773

页数：8

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