Improving Efficiency of Evaporated Cu₂ZnSnS₄ Thin Film Solar Cells by a Thin Ag Intermediate Layer between Absorber and Back Contact

Figure 2

HAADF image of CZTS solar cells without (a) and with (c) Ag intermediate layer. The yellow arrow denotes the direction of an EDS line scan; (b) and (d) elemental profiles measured by the EDS line scans which are defined by the yellow arrow in (a) and (c), respectively.

(a)

(b)

(c)

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