Simulation of the Efficiency of CdS/CIGS Tandem Multi-Junction Solar Cells Using AMPS-1D

TL;DR

This paper uses numerical simulations with AMPS-1D to optimize the design of CdS/CIGS tandem solar cells, achieving a predicted efficiency of 48.3%, significantly higher than single-junction cells.

Contribution

It introduces a simulation-based approach to optimize multi-junction CdS/CIGS solar cells, identifying design parameters for maximum efficiency.

Findings

Single-junction CdS/CIGS cells reach 17.3% efficiency at 200 nm CIGS p-layer.

Simulated tandem cells can reach 48.3% efficiency with 600 nm CIGS p-layer.

Simulation results align well with experimental data.

Abstract

In this paper we conduct numerical simulation of CdS/CIGS solar cells by use of the AMPS-1D software aiming to formulate the optimal design of the new multi-junction tandem solar cell providing its most efficient operation. We start with the numerical simulation of single-junction CdS/CIGS solar cells, which shows that its highest efficiency of 17.3% could be achieved by the thickness of CIGS p-layer of 200 nm. This result is in a good agreement with experimental data where the highest efficiency was 17.1% with the solar cell thickness of 1 micron. By use of the results of the numerical simulation of the single-junction solar cells we developed the design and conducted optimization of the new multi-junction tandem CdS/CIGS solar cell structure. Numerical simulation shows that the maximum efficiency of this solar cell is equal to 48.3%, which could be obtained with the thickness of the CIGS p-layer of 600 nm at a standard illumination of AM 1.5.