Analysis of Light Trapping Effects in Si Solar Cells with Textured Surface by Ray Tracing Simulation

Title
Analysis of Light Trapping Effects in Si Solar Cells with Textured Surface by Ray Tracing Simulation
Authors
변석주변석용이장교김재완이택성조규만신동우탁성주김동환김원목
Keywords
Ray tracing; Si Solar Cell; Texture; Etching
Issue Date
2011-07
Publisher
Current applied physics
Citation
VOL 11, NO 4, S23-S25
Abstract
The effects of the size and density of a pyramidal texture, as formed on the surface of Si solar cells to increase the light trapping efficiency, on the optical reflectance and absorptance were examined by comparing simulation results and experimental observations. A ray tracing algorithm capable of the direct calculation of the absorbed energy in active Si was utilized for the simulation. The simulation results showed that the optical reflectance spectra, i.e., the absorptances, of the textured surface with a fixed density of pyramids were not affected by the pyramid pitch, whereas the spectra with varying density of pyramids decreased with an increase in the density of the pyramids. Observations similar to the simulation results were observed from the experimentally textured surfaces, indicating that the density of the pyramid area, i.e., the area of the flat region, is the most crucial factor affecting the optical behavior of a textured Si surface with three-dimensional pyramid patterns.
URI
http://pubs.kist.re.kr/handle/201004/40640
ISSN
1567-1739
Appears in Collections:
KIST Publication > Article
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