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A Simple Optical Properties Modeling of Microcrystalline Silicon by the Effective Medium Approximation Method

Published online by Cambridge University Press:  10 February 2011

Woo Yeong Cho
Affiliation:
Departmtent of Electrical Engineering, KAIST, Taejon, Korea, wycho@pretty.kaist.ac.kr
Koeng Su Lim
Affiliation:
Departmtent of Electrical Engineering, KAIST, Taejon, Korea, wycho@pretty.kaist.ac.kr
Hyun-Mo Cho
Affiliation:
Department of Optics Laboratory, KRISS, Taejon, Korea
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Abstract

The optical properties of microcrystalline silicon (µc-Si) were estimated using the EMA (Effective Medium Approximation) method. This modeling was based on two-phase mixture, amorphous silicon (a-Si) and crystalline silicon (c-Si) with volume fractions of fa and fc respectively. From this modeling, it could be possible to understand thatµc-Si has lower light absorption characteristics than a-Si over all solar spectrum by considering hydrogen involvement in embedded a-Si part of iic-Si and crystalline volume fraction. Also, it is proposed that p-type pe- Si is superior to n-type tic-Si because of its high optical gap of Eo4 and its low absorption coefficient spectrum shape.

Type
Research Article
Copyright
Copyright © Materials Research Society 1996

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References

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