Study the Effect of Varying the Thickness of Intermediate Band on the Intermediate Band Solar Cells Efficiency

Abstract

In this paper we have implemented a model for the intermediate band GaAs solar cell. The model predicts an increase in the efficiency beyond the theoretical limit for a single-junction solar cell. The numerical results obtained from this modelling shows that the intermediate band solar cell has higher efficiency than the reference cell when only radiative recombination is included in the intermediate band material. Furthermore, we have investigated the role of concentrators on the solar cells efficiency, and have studied the effect of varying the intermediate band physical thickness on the intermediate band solar cells efficiency. The solar cell efficiency can be optimized by optimizing band gap for each intermediate band physical thickness.