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Proceedings Paper

Thin film solar cells based on cavity enhanced grating structure
Author(s): Guangyao Su; Fangwang Gou; Chuanhong Liu; Siyao Guo; Zhaoyu Zhang
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Paper Abstract

A cavity enhanced one-dimensional grating structure is proposed to improve the light absorption within the α-Si thin film solar cell. Typically, dielectric or metal structure including gratings is added for the light absorption enhancement. Not only does the structure form the guided modes, and increase the surface area/surface angle, but also the thin film itself forms a cavity allowing light trapping for better absorption. However, the structure is optimized in these two mechanisms separately. In this paper, finite element method (FEM) was used to optimize thicknesses of two cavities and then combine them into a one –dimensional grating structure. Comparing to the flat thin film solar cell, we have get absorption enhancement factors of 1.12 and 1.51 normalized for the AM 1.5 spectrum for 300 nm to 950 nm by the two proposed structures.

Paper Details

Date Published: 25 March 2013
PDF: 6 pages
Proc. SPIE 8620, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices II, 862022 (25 March 2013); doi: 10.1117/12.2004034
Show Author Affiliations
Guangyao Su, Peking Univ. Shenzhen Graduate School (China)
Fangwang Gou, Peking Univ. Shenzhen Graduate School (China)
Chuanhong Liu, Peking Univ. Shenzhen Graduate School (China)
Siyao Guo, Peking Univ. Shenzhen Graduate School (China)
Zhaoyu Zhang, Peking Univ. Shenzhen Graduate School (China)


Published in SPIE Proceedings Vol. 8620:
Physics, Simulation, and Photonic Engineering of Photovoltaic Devices II
Alexandre Freundlich; Jean-Francois Guillemoles, Editor(s)

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