期刊
JOURNAL OF APPLIED PHYSICS
卷 91, 期 8, 页码 5093-5099出版社
AMER INST PHYSICS
DOI: 10.1063/1.1459597
关键词
-
We investigate persistent photoconductivity in polycrystalline Cu(In,Ga)Se-2 thin films by measuring the transient behavior of their electrical conductivity under and after illumination. Characteristic nonexponential transients of the conductivity under and after illumination extend over more than four orders of magnitude in time. From this result, we conclude that the persistent photoconductivity in Cu(In,Ga)Se-2 cannot be explained by the mesoscopic barrier model. Rather, it is a microscopic effect which can be understood in the frame of a large lattice relaxation model. Investigation of the conductivity under monochromatic subband gap illumination determines the minimum photon energy for the direct excitation of the persistent photoconductivity to be approximately 0.6 eV. Hall effect measurements identify the persistent photoconductivity as a hole density effect in the bulk of the Cu(In,Ga)Se-2 grains, consistent with the lattice relaxation model. (C) 2002 American Institute of Physics.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据