Design and Optimization of Single Junction GaSb Solar Cell for Maximum Utilization of IR Solar Spectrum

We report the design and optimization of a n-GaSb/p-GaSb single-junction solar cell using the computer device simulator software (SILVACO ATLAS). The main objective of this paper is to optimize a single junction solar cell for maximum efficiency because of its low fabrication cost. We optimized the cell parameters such as thickness and doping concentration and to define the optimum values which allow us to reach the maximum conversion efficiency. We report a maximum conversion electrical efficiency up to 29.45% of the optimized cell under the 1.5G solar spectrum with Si substrate. The novelty of the designed cell is that it absorbed wide infrared spectrum which gives more number of carries to obtain better electrical efficiency.