PC is really a complex field since it involves several basic processes such as generation, recombination and transport of charge carriers. In order to understand these, one requires knowledge of other parameters that are not easy to control as these vary tremendously with the material, temperature, doping level, presence of donors, acceptors and traps, their concentration, capture cross-section, mobility of the charge carriers, type of electrical contacts, potential barriers created near them and unintentionally introduced defect states in the growth process. In this work I have provided the...