Chapter-4 Simulation of Hetrojunction Solar Cells with Afors -het

A number of approaches have been developed to synthesize the CuInSe2 and CuInGaSe2 based thin film solar cells [1-6]. Due to large numbers of parameters involve in processing a solar cell such as the energy band gap of the back surface field, thickness of the emitter, interface density etc. It is a difficult task to scrutinize and control the effect of each variable on the performance of the solar cell in laboratory. A method therefore based on computer simulations will be useful to provide a convenient way to evaluate the role of various parameters present in the fabrication process of the thin film heterojunction solar cells. A great advantage of computer simulation is its capacity to study in conditions without loss of materials beyond what is impossible or difficult experimentally. Computer simulation offers an attractive way of avoiding practical problems during experiment or synthesis of materials. In this chapter, the solar cells are computationally fabricated, simulated and optimized using AFORS-HET (Automat for simulation of hetero-structures) code [7]. The details of this code is available in ref. [7], however we briefly discuss the silent features of the code in following sections.