ABSENCE OF THE EX LUMINESCENCE IN KI CRYSTALS GROWN FROM AQUEOUS-SOLUTION

被引：4
作者：
ITOH, M
机构：
[1] Department of Applied Science, Faculty of Engineering, Shinshu University
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1995年 / 64卷 / 08期
关键词：
PHOTOLUMINESCENCE; FREE EXCITON; SELF-TRAPPED EXCITON; LOCALIZED EXCITON; ALKALI HALIDE; KI; RBI; SELF-TRAPPING; LATTICE RELAXATION; CRYSTAL GROWTH; LOW-TEMPERATURE SOLUTION GROWTH;
D O I：
10.1143/JPSJ.64.3097
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
It is found that the Ex luminescence at 3.01 eV is absent in KI crystals grown from aqueous solution. This indicates that the Ex luminescence is extrinsic feature of KI and arises from the radiative annihilation of excitons localized near lattice imperfections. The Na+-related luminescence at 2.60 eV in RbI is also confirmed to be absent if the crystals are prepared from solution. The present work opens a way to study the self-trapping of excitons in KI and RbI without being disturbed by the influence of imperfection-related luminescence.
引用
收藏
页码：3097 / 3104
页数：8
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