4.3 Article

Efficiency enhancement of thin-film solar cell by implementation of double-absorber and BSF layers: the effect of thickness and carrier concentration

Journal

JOURNAL OF COMPUTATIONAL ELECTRONICS
Volume 21, Issue 3, Pages 675-683

Publisher

SPRINGER
DOI: 10.1007/s10825-022-01878-w

Keywords

Thin film; BSF; CIGS; CZTSe; Thickness; Efficiency

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A back surface field CIGS multilayer solar cell structure with a CZTSSe layer as a second absorber layer between the BSF and CIGS layers was simulated using SCAPS 1D. By optimizing the thickness and carrier concentration of different layers, a solar cell with a power conversion efficiency of 35.1% was achieved.
A back surface field CIGS multilayer solar cell structure is simulated by SCAPS 1D, in which a CZTSSe layer is added between BSF and CIGS layers as a second absorber layer. To achieve the best performance for the proposed structure, the thickness of different layers and the related carrier concentration varied. The 1 mu m and 0.05 mu m thickness for CZTSSe and CIGS leads to the best performance of the device. The optimum thickness for the rest of layers is also calculated. The effect of the carrier concentration on the performance of the proposed solar cell is also studied. After optimization, a solar cell with a privileged power conversion efficiency of 35.1% was achieved.

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