An optical simulation algorithm based on ray tracing technique for light absorption in thin film solar cells

Title
An optical simulation algorithm based on ray tracing technique for light absorption in thin film solar cells
Authors
변석주변석용이장교김재완이택성김원목박영규조규만
Keywords
Thin silm solar cell; Absorption; Non-sequential ray tracing
Issue Date
2011-01
Publisher
Solar energy materials and solar cells
Citation
VOL 95, NO 1, 408-411
Abstract
Solar cells, especially thin film solar cells, utilize rough surfaces actively in order to improve light trapping efficiency. In this study, we propose a new optical simulation method, which is capable of taking into consideration the realistic surface and interface morphology. The proposed simulation algorithm is based upon a non-sequential ray tracing technique, and direct calculation of the optical absorption energy is performed by separating the light passing through medium into the coherent part and the incoherent part in the course of non-sequential ray tracing throughout the whole region of solar cell structure. It was shown that the new method can give more accurate estimation of the absolute absorption energy in the individual layer when applied for a thin film Si solar cell structure with rough surface of bidirectional scattering distribution function. Furthermore, the proposed algorithm was proved to be very effective in analyzing solar cells with complex geometry like concentrator photovoltaic system, which necessitates the combination of coherent and incoherent calculation.
URI
http://pubs.kist.re.kr/handle/201004/39120
ISSN
0927-0248
Appears in Collections:
KIST Publication > Article
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