Although the efficiency of solar cell is improving day by day, still there is a large gap between the theoretically predicted limit and the actual achieved efficiency. Improvement in the efficiency of solar cell even by few per cent makes a lot of difference in the watts per cent cost. Various factors, such as; spectral distribution, temperature and resistive load influence the electrical power output of solar cell and factors such as reflection, thermodynamics, charge carrier generation and conduction influence the conversion efficiency of a solar cell.