Coevaporated KInSe sub(2): A Fast Alternative to KF Postdeposition Treatment in High-Efficiency Cu(In,Ga)Se sub(2) Thin Film Solar Cells
Cu(In,Ga)Se sub(2)-based thin film solar cells have reached 22.3% energy conversion efficiency. This outstanding level of performance has been made possible by the use of a so-called potassium fluoride postdeposition treatment (KF-PDT) after the absorber synthesis. Such a treatment, consisting of ev...
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Veröffentlicht in: | IEEE journal of photovoltaics 2016-09, Vol.6 (5), p.1316-1320 |
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Sprache: | eng |
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Zusammenfassung: | Cu(In,Ga)Se sub(2)-based thin film solar cells have reached 22.3% energy conversion efficiency. This outstanding level of performance has been made possible by the use of a so-called potassium fluoride postdeposition treatment (KF-PDT) after the absorber synthesis. Such a treatment, consisting of evaporating KF under Se atmosphere, has been suggested to enhance the formation of a KInSe sub(2) surface layer. In this paper, we propose an alternative to the standard KF-PDT, in which we simultaneously evaporate KF and In under Se atmosphere. We compare by X-ray photoemission spectroscopy the modified absorber surfaces in both cases and discuss the advantages of this alternative in terms of robustness and rapidity of the process. |
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ISSN: | 2156-3403 |
DOI: | 10.1109/JPHOTOV.2016.2589365 |