High-electric-field photocurrent in thin-film ZnS formed by pulsed-laser deposition

被引：22
|
作者：
Yano, S
Schroeder, R
Sakai, H
Ullrich, B [1 ]
机构：
[1] Bowling Green State Univ, Dept Phys & Astron, Ctr Mat Sci, Bowling Green, OH 43403 USA
[2] Bowling Green State Univ, Dept Phys & Astron, Ctr Photochem Sci, Bowling Green, OH 43403 USA
[3] Hiroshima Kokusai Gakuin Univ, Fac Engn, Aki Ku, Hiroshima, Japan
来源：
APPLIED PHYSICS LETTERS | 2003年 / 82卷 / 13期
关键词：
D O I：
10.1063/1.1564287
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Photocurrent spectra of thin-film ZnS on glass fabricated by pulsed-laser deposition have been studied employing electric fields up to 20 kV/cm. The spectra show a shift towards lower energy at and beyond 10 kV/cm. By modeling the film absorption with the density of states and the Urbach rule, it is shown that, without the involvement of the Franz-Keldysh effect and excitonic transitions, the slope of the Urbach tail depends on the electric field, owing to impurity ionization. (C) 2003 American Institute of Physics.
引用
收藏
页码：2026 / 2028
页数：3
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