Patent ID: 7211462
Filing Date: 2007-05-01
Classification: C23C,H01L,Y02E,Y02P

Abstract:
1. A process for large-scale production of CdTe/CdS thin film solar cells, films of the cells being deposited, in sequence, on a transparent substrate, the sequence comprising the steps of: depositing a film of a transparent conductive oxide (TCO) on the substrate; depositing a film of CdS on the TCO film; depositing a film of CdTe on the CdS film; treating the CdTe film with CdCl depositing a back-contact film on the treated CdTe film; wherein the treatment of the CdTe film with CdCl forming a layer of CdCl annealing the CdCl removing the inert gas from the chamber so as to produce a vacuum condition, while the substrate is kept at a temperature generally within a range of 350° C. and 420° C. whereby any residual CdCl