Abstract
We investigated the influence of sintering heating rate from room temperature to 600 °C on the properties of Cu2ZnSn(S,Se)4 thin films and solar cells fabricated from nanoparticles. It was found that the efficiency of the Cu2ZnSn(S,Se)4 solar cell increases by using a faster heating rate. Capacitance–voltage profiling showed the decrease of the charge carrier concentration and the expansion of the space-charge region by using a faster heating rate, which leads to the improvement of short-circuit current density and fill factor. The top-view SEM images and X-ray diffractions indicated that the crystallization of the Cu2ZnSn(S,Se)4 thin films during heating can be restrained by a fast heating rate.
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