Double-layer antireflection coatings for CIGS thin-film solar cells

Faiz Ahmad; Benjamin J. Civiletti; Peter B. Monk; Akhlesh Lakhtakia

doi:10.1117/12.2645881

31 January 2023 Double-layer antireflection coatings for CIGS thin-film solar cells

Faiz Ahmad, Benjamin J. Civiletti, Peter B. Monk, Akhlesh Lakhtakia

Proceedings Volume 12477, International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors 2022; 124770E (2023) https://doi.org/10.1117/12.2645881
Event: International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors, 2022, Boston, Massachusetts, United States

Abstract

Antireflection coatings are vital for reducing loss due to optical reflection in photovoltaic solar cells. A single-layer magnesium fluoride (MgF₂) antireflection coating is usually used in thinfilm CIGS solar cells. According to optics, this coating can be effective only for a narrow spectral regime. Further reduction of reflection loss may require an optimal single-layer or multi-layer coating. Hence, we optimized the refractive indices and thicknesses of single- and double-layer antireflection coatings for CIGS solar cells containing a CIGS absorber layer with: (i) homogeneous bandgap, (ii) linearly graded bandgap, or (iii) nonlinearly graded bandgap. A relative enhancement of up to 1.83% is predicted with an optimal double-layer antireflection coating compared to the efficiency with a single-layer antireflection coating.

Citation Download Citation

Faiz Ahmad, Benjamin J. Civiletti, Peter B. Monk, and Akhlesh Lakhtakia "Double-layer antireflection coatings for CIGS thin-film solar cells", Proc. SPIE 12477, International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors 2022, 124770E (31 January 2023); https://doi.org/10.1117/12.2645881

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