A multiple-selenization process for enhanced reproducibility of Cu2ZnSn(S,Se)4 solar cells

A multiple-selenization process for wet-chemically fabricated kesterite-type Cu2ZnSn(S,Se)4solar cells is reported that significantly improves the overall sample quality of the absorber layer and especially the reproducibility of devicecharacteristics. Conversion efficiencies of up to 7.2% are obtained. With this method, the absorber forms a very compact, hole- and crack-free layer and avoids the formation ofmultilayer ortrilayer structures. Mainly, the seriesresistance and therefore the short-circuit current can be stabilized, which leads to lower fluctuation of the energy conversion efficiency of thesolar cells on the same sample.

Source: Applied Physics Letters - December 5, 2016 Category: Physics Authors: Markus Neuwirth, Huijuan Zhou, Thomas Schnabel, Erik Ahlswede, Heinz Kalt and Michael Hetterich Source Type: research