Abstract
AbstractCu2ZnSnS4 (CZTS) thin film solar cells have been fabricated using sol‐gel sulfurizing method under non‐vacuum processing. The solar cells structure is Al/ZnO:Al/CdS/ CZTS/Mo/Soda Lime Glass(SLG) substrate. In our previous reports, the surface of CZTS got rougher as the particle diameter increased. In addition, there were many spots where CZTS layer was not coated enough by ZnO:Al window layer. In this report, in order to improve conversion efficiency of the CZTS solar cells, we focus on the ZnO:Al layer and the effect of an increase in the number of ZnO:Al coating repetition and the dependence on drying time and temperature for ZnO:Al were investigated. Optimized conversion efficiency of 3.61% was achieved with 15 coating repetition of ZnO:Al layer coated at 350 °C and dried for 3 min. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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