Utilization of low cost metals as back contact with Perovskite Solar Cell

Abstract

Organic halide perovskite-based solar cells have high photovoltaic conversion efficiency, because the materials show superior optoelectronic behavior, lower defect density and broader absorption spectra. A better understanding of the relationships between material parameters, device architectures and performances is still required for the continued development of the solar cell. This paper represents how the work function of metals can affect their photovoltaic characteristics. Comparatively cheap metals such as Al, Ag and C have been studied as the back contact electrodes for perovskite solar cell. The general trend observed is that the shunt resistance and open-circuit voltage of the devices decrease with the decreasing work function of the contact metal. Spiro-OMeTAD and TiO2 have been used as hole transporting material and electron transporting material respectively in this solar cell. The results have showed that the materials of high work function can produce good ohmic contact with HTM. Maximum efficiency of 27.67% have been found for C-based perovskite solar cell.