Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1675821 | Thin Solid Films | 2007 | 6 Pages |
Abstract
Phase control is critical for achieving high-performance CdTe cells when CuxTe is used as a back-contact for CdTe cells. CuxTe phases are mainly controlled by the Cu/Te ratio, and they can also be affected by post-heat-treatment 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 CdS 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.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
X. Wu, J. Zhou, A. Duda, Y. Yan, G. Teeter, S. Asher, W.K. Metzger, S. Demtsu, Su-Huai. Wei, R. Noufi,