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Zinc sulfide (ZnS) buffer layer deposited by an ultrasonic spray pyrolysis (USP) method is a feasible alternative to the chemical bath deposited cadmium sulfide (CdS) buffer layer. In the present work we report the results of a low-cost, non-vacuum and in-line compatible method to grow ZnS thin films. We investigated the properties of USP-ZnS films grown at different substrate temperatures and spray...
High-efficiency Cu(In1-xGax)Se2 (CIGSe)-based solar cells utilize a CdS buffer layer between the window and the chalcopyrite absorber. Soft x-ray spectroscopies were employed to investigate the chemical properties of the CdS/CIGSe interface and its dependence on the details of the chemical bath deposition (CBD) of CdS. We have investigated the CdS/CIGSe interface after various CdS CBD times (0, 4,...
Band alignments and microscopic structures at interfaces between CdS buffer layer grown by chemical bath deposition and Cu(In1-x Gax)Se2 (CIGS) absorbing one by three stage co-evaporation have been studied as a function of Ga substitution ratio x by means of photoemission, inverse photoemission spectroscopy, Kelvin probe force microscopy and in-situ X-ray photoemission spectroscopy (XPS). For the...
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