Auger-free luminescence due to interatomic p-d transition and self-trapped exciton luminescence in Rb2ZnCl4 crystals

被引：9

作者：

Ohnishi, Akimasa ^{[1
]}

Saito, Miki ^{[1
]}

Kitaura, Mamoru ^{[1
]}

Itoh, Minoru ^{[2
]}

Sasaki, Minoru ^{[1
]}

机构：

[1] Yamagata Univ, Dept Phys, Yamagata 9908560, Japan

[2] Shinshu Univ, Dept Elect & Elect Engn, Nagano 3808553, Japan

来源：

JOURNAL OF LUMINESCENCE | 2012年 / 132卷 / 10期

关键词：

Auger-free luminescence; Cross-luminescence; Core-valence luminescence; Interatomic p-d transition; Self-trapped exciton luminescence; Rb2ZnCl4; IONIC-CRYSTALS; CROSS-LUMINESCENCE; CORE HOLES; LATTICE-RELAXATION; VALENCE-ELECTRONS; SPECTROSCOPY; SPECTRA; HALIDES; ALKALI; BAND;

D O I：

10.1016/j.jlumin.2012.05.009

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

It is reported that Auger-free (AF) luminescence appears with two bands at 4.5 and 6.3 eV in Rb2ZnCl4. This luminescence originates from a radiative transition of the Cl 3p valence electrons into the Zn 3d outermost-core holes. The present work is the first observation of AF luminescence due to interatomic p similar to d transitions in halide crystals. The appearance of two AF luminescence bands suggests the existence of two types of AF transitions following core hole creation. A largely Stokes-shifted luminescence band is also found to appear at 1.9 eV. This band has an excitation threshold at the fundamental absorption edge, and is ascribed to the radiative decay of a self-trapped exciton. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：2639 / 2642

页数：4

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