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

Figure 1

(a) X-ray diffraction (XRD) spectra of the CZTS thin films on Mo back contacts with and without the Ag intermediate layer; (b) Raman spectra of CZTS absorbers with and without 20 nm Ag intermediate layer; and (c) Raman spectra of samples in (a) with the absorber mechanically removed by the same method applied in [15].

(a)

(b)

(c)