Cathodoluminescence of Cu(In,Ga)Se2 thin films used in high-efficiency solar cells

被引：75

作者：

Romero, MJ ^{[1
]}

Ramanathan, K ^{[1
]}

Contreras, MA ^{[1
]}

Al-Jassim, MM ^{[1
]}

Noufi, R ^{[1
]}

Sheldon, P ^{[1
]}

机构：

[1] Natl Renewable Energy Lab, Golden, CO 80401 USA

来源：

APPLIED PHYSICS LETTERS | 2003年 / 83卷 / 23期

关键词：

D O I：

10.1063/1.1631083

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Cathodoluminescence spectroscopy and spectrum imaging are employed to investigate Cu(In,Ga)Se-2 (CIGS) thin films used in high-efficiency solar cells. We have found a nonuniform spatial distribution for the photon energy. The shift by decade of the emission spectrum is also found to depend systematically on the location of excitation. In addition, the photon energy at grain boundaries is not affected by the external excitation. A model for radiative recombination to be applied to these chalcopyrite compounds should explain these results, and some suggestions are considered. (C) 2003 American Institute of Physics.

引用

页码：4770 / 4772

页数：3