Influence of Secondary Phases in Kesterite-Cu₂ZnSnS₄ Absorber Material Based on the First Principles Calculation

Figure 1

Band alignment of CZTS/secondary phase. (a) Type I heterointerface with of the secondary phase smaller than that of CZTS. (b) Type I heterointerface with of the secondary phase larger than that of CZTS. (c) Type II heterointerface with CBM and VBM in the secondary phase lower than that of CZTS. (d) Type II heterointerface with CBM and VBM in the secondary phase higher than that of CZTS.

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(b)

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