By Niklas Papathanasiou, Head of CIGS Solar Cell Development, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH/PVcomB
This is the second part of a review article series about current topics in R&D concerning Cu(In,Ga)(Se,S)2 – or CIGS – solar cells. In the first part, which appeared in the previous edition of Photovoltaics International, the focus was on CIGS absorber layer formation. This second part will discuss another essential part of CIGS solar cells – the buffer layer – in conjunction with metastabilities in these types of cell.
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