Impact of environment factors on solar cell parameters of a-Si[short parallel][micro]c-Si photovoltaic modules

The behavior of amorphous silicon[short parallel]micro crystalline silicon (a-Si[short parallel][micro]c-Si) tandem-type photovoltaic (PV) module is complex because the output current is limited by the lower current component cell. Also, the outdoor behaviors are not fully understood. The impact of environment factors on solar cell parameters of a-Si[short parallel][micro]c-Si PV module was quantitatively analyzed and the module was compared with other silicon-based PV modules (single crystalline silicon (sc- Si) and amorphous silicon (a-Si)). The contour maps of solar cell parameters were constructed as a function of irradiance and module temperature. The contour map of a-Si[short parallel][micro]c-Si PV modules is similar to that of a-Si modules. The results imply that output characteristics of a-Si[short parallel][micro]c-Si PV modules are mainly influenced by the a-Si top cell. Furthermore, the efficiency of a-Si[short parallel][micro]c-Si PV modules was compared other solar cell parameters and the contour map of efficiency is similar to that of fill factor.