Reduction of dark current for multi quantum wells solar cells

This paper is devoted to achieve a minimum dark current for both single and multiple quantum well solar cells. This minimization will increase the fill factor of the device and improve the overall efficiency. The study is performed using a self-consistent model. The model is based on the solution of semiconductor transport equations in the bulk regions and the solution of Schrodinger equation to model the absorption spectra of the quantum wells. The model takes into account the capture, escape and recombination of photoexcited carriers in the quantum wells. The model results are compared with the results from both theoretical model and experimental work. The present model shows a good agreement with the experimental results compared with the other model. It is found that the thickness of intrinsic layer and the quantum well location in the intrinsic layer need to be controlled in order to reduce the dark current of the device