“…Thus, we conclude that because of the reduction of the conduits for impurity migration, CdC1, treatment reduces defect density and improves the cell performance. Notice that several investigators have found that the CdCl, treatment promotes the grain growth [8,9,10], which should reduce S, and enhance the film quality and cell efficiency. In this study, we did not observe a significant change in the CdTe grain size, instead we saw a change in the S,, value.…”