EXCITATION SPECTRUM OF EXCITON LUMINESCENCE YIELD IN 2H-PBI2 AND ITS RELATION TO URBACH RULE

被引：3

作者：

TAKEDA, J

GOTO, T

机构：

[1] Tohoku Univ, Sendai, Jpn, Tohoku Univ, Sendai, Jpn

来源：

SOLID STATE COMMUNICATIONS | 1986年 / 59卷 / 04期

关键词：

LUMINESCENCE;

D O I：

10.1016/0038-1098(86)90581-8

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Excitation spectra for the exciton luminescence has been measured in the exciton absorption band region and its lower energy part of 2H-PbI//2 at 100 K. The luminescence yields for the free and the 'Urbach' excitons are constant in each of the free exciton region and the Urbach tail, but these values are different from each other. It is concluded that each of the free and Urbach excitons is in thermal equilibrium but both kinds of excitons are not in the same thermal equilibrium. However, the luminescence yield for the exciton in the intermediate region is not interpreted in terms of the thermal equilibrium.

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页码：209 / 213

页数：5

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