Dominant recombination path in low-bandgap kesterite CZTSe(S) solar cells from red light induced metastability

Hetero-junction kesterite Cu2ZnSn(S,Se)4 solar cells with low bandgap obtained from three different methods of fabrication were exposed to red light illumination, and the changes observed in their electronic properties due to this exposure were studied via open circuit voltage transients, admittance...

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