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Enhancing light absorption inside CZTS solar cells using plasmonic and dielectric wire grating metasurface
Author(s): Omar A. M. Abdelraouf; Ahmed Shaker; Nageh K. Allam
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Paper Abstract

Efficiency of CZTS (Cu2ZnSnS4) based thin film solar cell has witnessed rapid increase from nearly 5.7% in 2005 to more than 9% in 2016. These enhancements made CZTS solar cell a good candidate for low cost solar cells. However, low efficiency limit this choice, therefore, enhancing generated photocurrent would enhance overall efficiency. Metasurface has attracted great interest in last decade because of its ability for reducing light reflection and increasing light transmission over wide range of electromagnetic waves spectrum. Plasmonic metasurface has many advantages for antireflective surface with minor light losses disadvantages. All dielectric metasurface is promising because light losses would minimize and give better performance over plasmonic metasurface. Our results indicate that, light coupling to CZTS solar cells could be enhanced much more than planar structure after using suggested optimum dimension, pitch, coated dielectric thickness. Role of electric and magnetic diploes excited in gold wires and Mie resonance dipoles in dielectric play important role in guiding light to CZTS substrate, through our result, we suggest method for controlling them. Using three-dimensional optical modelling based on finite element method simulation tool for all our proposed structures. For verifying our results, we compared our simulated planar CZTS solar cells with fabricated one in previous work and good matching achieved for light absorption. Integrating suggested wire grating plasmonic and dielectric wire grating metasurface with planar CZTS solar cells would enhance its overall efficiency furthermore more.

Paper Details

Date Published: 7 May 2018
PDF: 10 pages
Proc. SPIE 10671, Metamaterials XI, 106712K (7 May 2018); doi: 10.1117/12.2307279
Show Author Affiliations
Omar A. M. Abdelraouf, Ain Shams Univ. (Egypt)
The American Univ. in Cairo (Egypt)
Ahmed Shaker, Ain Shams Univ. (Egypt)
Nageh K. Allam, The American Univ. in Cairo (Egypt)


Published in SPIE Proceedings Vol. 10671:
Metamaterials XI
Allan D. Boardman; Anatoly V. Zayats; Kevin F. MacDonald, Editor(s)

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