Effects of CdS Buffer Layers on Photoluminescence Properties of Cu₂ZnSnS₄ Solar Cells

Figure 3

EQE of a CdS/CZTS solar cell based on the Cu-poor/Zn-rich CZTS layers examined in this work. The determination of the absorber bandgap obtained by interpolation of the low energy part of the EQE curve is reported in the inset.