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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...
We have developed a novel technique to improve Cu(In1-xGax)Se2 (CIGSe) cell performance by means of water vapor introduction during CIGSe deposition. We have examined thus far the effectiveness of water vapor introduction on CIGSe with particular emphasis on a Ga/(In+Ga) ratio x of around 0.5. In this study, the effects of water vapor introduction on thin film properties and solar cell performance...
The goal of this work is to fabricate and study wide gap CuGaSe 2 solar cells to be used as top cell of a mechanically stacked tandem device. CuGaSe2 (CGS) absorber thin films are prepared by co-evaporation in a three stage process onto Mo/soda-lime glass substrates and onto different transparent conductive oxides (TCOs): SnO2:F (FTO) and ln2O3:Sn (ITO). Laser light scattering (LLS) is used as an...
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