Investigating the experimental space for two-step Cu(In,Ga)(S,Se)2 absorber layer fabrication: A design of experiment approach

Abstract

This research reveals the missing or often undisclosed experimental data on processing conditions of Cu(In,Ga)(S,Se)(2) absorbers by the two-step sequential technique. Accordingly, by employing a one-variable-at-a-time approach, where each factor is exclusively changed with respect to a defined center point, we identified a handful of significant parameters which play the most significant role in an absorber's properties and conse-quently, prospective high-performing solar cells. This was done by analyzing their impact on a few most important metrics. Hence, the vast processing window with numerous factors and levels for development of Cu (In,Ga)(S,Se)(2) by this method becomes constrained and feasible to optimize in future endeavours.