RELAXATION OF EXCITONS IN WIDE-GAP CSCL CRYSTALS

被引：22

作者：

LUSHCHIK, A ^{[1
]}

FELDBACH, E ^{[1
]}

FRORIP, A ^{[1
]}

IBRAGIMOV, K ^{[1
]}

KUUSMANN, I ^{[1
]}

LUSHCHIK, C ^{[1
]}

机构：

[1] ESTONIAN ACAD SCI, INST PHYS, 2400 TARTU, ESTONIA

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1994年 / 6卷 / 12期

关键词：

D O I：

10.1088/0953-8984/6/12/009

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Optical characteristics of free and self-trapped excitons are investigated in simple cubic CsCl crystals of high purity. The reflection, photoluminescence, cathodoluminescence and x-ray luminescence spectra, as well as the excitation spectra for intrinsic, impurity and near-defect emissions and spectra of the anion Frenkel defect creation by radiation are measured in CsCl crystals at 5-80 K in the spectral region of 2 to 10 eV. A weak emission at 8.3 eV and pi-emission of self-trapped excitons (2.82 eV) are detected in CsCl at 5 K. The energy gap is estimated as E(g) = 8.4 eV at 5 K. Some peculiarities of the radiative and non-radiative decay of excitons in sc CsCl in comparison with those of FCC KCl and RbCl crystals are discussed.

引用

页码：2357 / 2366

页数：10

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