For ideal solar cell, the main requirements of the material is that its band gap should be between 1.1 and 1.7 eV. The material should have direct band gap. It should produce good photoconversion efficiency. They should be stable (lifetime should be 20–30 years) and reliable [1]. The source material should be easily available, non-toxic, and cost-effective. It should not be hazardous to environmental. It should have good band offsets with respect to the window materials, there should not be interface state in the energy gap and carriers should be able to cross over the grain boundaries [13].