Abstract
In this paper, we present a simulation study of Cu(In,Ga)Se2 (CIGS) based solar cell using a physically based two-dimensional device simulator Silvaco-Atlas under AM1.5 illumination. First, we studied the effect of CIGS layer thickness, doping concentrations, and defects on the J–V properties and the quantum efficiency (QE) of a conventional cell. The simulated structure shows an open circuit voltage equal to 0.80 V, a short circuit current density equal to 30.03 mA/cm2, a fill factor equal to 82.77% and the obtained efficiency of the conventional cell is 19.80% with CIGS absorber layer thickness of about 1.5 μm, our simulation results of the CIGS solar cell are in good agreement with the simulated and experimental results found in literature. In order to improve the solar cells efficiency, the back surface field (BSF) based on hydrogenated microcrystalline silicon μc-Si:H(p+) layer has been inserted between the back contact (Mo) and the CIGS absorber layer, in this case the structure presents an open voltage equal to 0.84 V, a short circuit current density equal to 32.55 mA/cm2, a fill factor equal to 85.31% and an efficiency of 23.42%. The obtained results demonstrate that the addition of μc-Si:H(p+) BSF layer increases the efficiency of CIGS solar cells, reaching a maximum value of 23.42% for 1.5 μm of CIGS thickness and 10 nm for μc-Si:H(p+) BSF layer.
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RZ: Writing—original draft, Validation, Formal analysis, Software, Writing—review & editing, Resources. IB: Investigation, Supervision, Visualization, Writing—original draft, Software. OS: Formal analysis, Software, Validation, Writing—review & editing. LD: Writing—original draft, Writing—review & editing. EZ: Writing—original draft.
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Zouache, R., Bouchama, I., Saidani, O. et al. Numerical study of high-efficiency CIGS solar cells by inserting a BSF µc-Si:H layer. J Comput Electron 21, 1386–1395 (2022). https://doi.org/10.1007/s10825-022-01942-5
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DOI: https://doi.org/10.1007/s10825-022-01942-5