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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