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Issue 13, 2014
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Efficiency enhancement in Cu2ZnSnS4 solar cells with subwavelength grating nanostructures

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Abstract

In the article, a study of sub-wavelength grating (SWG) nanostructures for broadband and omni-directional anti-reflection coatings (ARCs) on Cu2ZnSnS4 (CZTS) solar cells using the rigorous coupled-wave analysis (RCWA) method is presented. Various SWG nanostructures of different shapes and periodic geometry on CZTS solar cells are discussed in detail. The optimized reflectance decreased to 1.67%, and efficiency increased to 13.74%, accordingly. The omni-directional and broadband antireflections of the SWG nanostructures are also investigated. Under a simulated 1-sun condition and with the light incident angle increased to 80°, cells with SWG nanostructures enhanced the short-circuit current density by 16.5%. This considerable enhancement in light harvesting is attributed to the linearly graded effective refractive index profile from the air to the device surface.

Graphical abstract: Efficiency enhancement in Cu2ZnSnS4 solar cells with subwavelength grating nanostructures

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Article information


Submitted
28 Jan 2014
Accepted
03 Apr 2014
First published
22 Apr 2014

Nanoscale, 2014,6, 7553-7559
Article type
Paper
Author version available

Efficiency enhancement in Cu2ZnSnS4 solar cells with subwavelength grating nanostructures

S. Kuo and M. Hsieh, Nanoscale, 2014, 6, 7553
DOI: 10.1039/C4NR00566J

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