Abstract
We report the effect of potassium cyanide etching treatment on structural, optical and electrical properties of Cu2ZnSnS4 thin films prepared by a spray-assisted chemical vapor deposition process. Raman spectroscopy and X-ray diffraction measurements before and after potassium cyanide etching have confirmed the kesterite structure of Cu2ZnSnS4 films. Potassium cyanide treatment led to the elimination of [Formula: see text]S secondary phase. Optical measurements showed that the band gap value was about 1.52[Formula: see text]eV. The best electrical resistivity and Hall mobility values were reached for a deposition temperature of 450∘C in both cases without and with potassium cyanide treatment.
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