Poole-Frenkel ionization of excitons in solid Kr

被引：7
|
作者：
Kraft, J
Schrimpf, A
Schweitzer, B
Ibbeken, K
Stockmann, HJ
机构：
[1] UNIV MARBURG,FACHBEREICH PHYS,D-35032 MARBURG,GERMANY
[2] WISSENSCH ZENTRUM MAT WISSENSCH,D-35032 MARBURG,GERMANY
来源：
EUROPHYSICS LETTERS | 1997年 / 39卷 / 04期
关键词：
D O I：
10.1209/epl/i1997-00377-0
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
During vacuum-UV excitation of the excitons in solid Kr photoconductivity nas observed. For applied voltages below 50 V the photocurrent spectrum reflected the number of excitons produced in the bulk, whereas at higher voltages the contribution of excitons in a thin surface layer, including longitudinal and surface excitons, dominated the spectrum. These findings can be explained under the assumption of a Poole-Frenkel effect in the electrical fields produced by surface charges generated during the irradiation.
引用
收藏
页码：459 / 464
页数：6
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