Isotextured Silicon Solar Cell Analysis and Modeling 1: Optics

被引:57
作者
Baker-Finch, Simeon C. [1 ]
McIntosh, Keith R. [2 ]
Terry, Mason L. [3 ]
机构
[1] Australian Natl Univ, Canberra, ACT 0200, Australia
[2] PV Lighthouse, Coledale, NSW 2515, Australia
[3] Dupont Innovalight, Sunnyvale, CA 94085 USA
来源
IEEE JOURNAL OF PHOTOVOLTAICS | 2012年 / 2卷 / 04期
关键词
Device modeling; geometrical optics; photovoltaic cells; ray tracing; semiconductor; silicon; surface texture; TEXTURED SILICON; REFLECTANCE; LIGHT;
D O I
10.1109/JPHOTOV.2012.2206569
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
A comprehensive investigation reveals three useful approximations to the optical behavior of isotextured silicon solar cells. First, we confirm experimentally that front-surface reflectance is accurately modeled with "spherical cap" geometry. Second, we find that light reflected from the surface has a Lambertian distribution. Random upright pyramid texturing results in a less favorable distribution so that, when encapsulated, photogeneration in an isotextured cell approaches 99% of that achieved in an equivalent pyramidally textured device. Third, we perform ray tracing simulations to determine the 1-D photogeneration profile beneath isotexture. On their first pass, rays traverse the substrate at angle theta(1) with respect to the macroscopic normal such that they are distributed according to cos(3 theta(1)/2). This approximation to the ray trajectory establishes, for isotexture, a useful simulation tool that has been available for application to pyramidally textured devices for two decades. This paper is followed by a contribution that investigates recombination at isotextured surfaces, coupling results with optical analyses to model the performance of isotextured solar cells.
引用
收藏
页码:457 / 464
页数:8
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