Colloidal CuZnSnSe4−xSx nanocrystals for hybrid solar cells

•The manuscript is the first report for CZTS(Se):PCBM bulk heterojunction solar cell.•Electrochemistry of CZTS, CZTSe and CZTSeS is firstly demonstrated in this paper.•It is first comparative study on CZTSeS hybrid solar cells.

We report the synthesis of different colloidal CZTSe4−xSx nanocrystals and their performance in [6,6]-phenyl C61 butyric acid methyl ester (PCBM) based organic/inorganic hybrid bulk heterojunction solar cells. Synthesis of colloidal CuZnSnSe4−xSx were performed and characterized by XRD, TEM, SEM, UV–Visible absorption techniques. Electrochemical and photovoltaic properties were investigated. The best device concept, ITO/PEDOT:PSS/CZTS:PCBM blend (1:10)/Al, showed 280 μA/cm2 short circuit current, Isc with 300 mV open circuit voltage Voc, and fill factor FF of 0.38.

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