Phase control of CuxTe film and its effects on CdS/CdTe solar cell

被引：142
作者：
Wu, X.
Zhou, J.
Duda, A.
Yan, Y.
Teeter, G.
Asher, S.
Metzger, W. K.
Demtsu, S.
Wei, Su-Huai
Noufi, R.
机构：
[1] Natl Renewable Energy Lab, Golden, CO 80401 USA
[2] Colorado State Univ, Dept Phys, Ft Collins, CO 80523 USA
来源：
THIN SOLID FILMS | 2007年 / 515卷 / 15期
关键词：
cadmium telluride; copper telluride; back-contact;
D O I：
10.1016/j.tsf.2006.12.151
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Phase control is critical for achieving high-performance CdTe cells when Cu,Te is used as a back-contact for CdTe cells. CqTe phases are mainly controlled by the Cu/Te ratio, and they can also be affected by post-heat-trcatment temperature. Although Cu2Te has the highest conductivity, it is unstable and provides more Cu diffusion into the CdS and CdTe films. Cu diffusion into the Us causes '' cross-over '', and Cu diffusion into the CdTe film creates Cu-related defects that lower photogenerated carrier lifetime and result in voltage-dependent collection. A '' recontact '' experiment clearly indicated that the mechanism giving rise to '' roll-over '' is the formation of Cu-related oxides, rather than the loss of Cu on the back-contact. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：5798 / 5803
页数：6
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