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Title: Al+Si Interface Optical Properties Obtained in the Si Solar Cell Configuration

Abstract

Al is a commonly used material for rear side metallization in commercial silicon (Si) wafer solar cells. In this study, through-the-silicon spectroscopic ellipsometry is used in a test sample to measure Al+Si interface optical properties like those in Si wafer solar cells. Two different spectroscopic ellipsometers are used for measurement of Al+Si interface optical properties over the 1128-2500 nm wavelength range. For validation, the measured interface optical properties are used in a ray tracing simulation over the 300-2500 nm wavelength range for an encapsulated Si solar cell having random pyramidal texture. The ray tracing model matches well with the measured total reflectance at normal incidence of a commercially available Si module. The Al+Si optical properties presented here enable quantitative assessment of major irradiance/current flux losses arising from reflection and parasitic absorption in encapsulated Si solar cells.

Authors:
ORCiD logo [1];  [2];  [2];  [1]
  1. Univ. of Toledo, OH (United States). Wright Center for Photovoltaics Innovation and Commercialization (PVIC)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
OSTI Identifier:
1418122
Alternate Identifier(s):
OSTI ID: 1400003
Report Number(s):
NREL/JA-5J00-68655
Journal ID: ISSN 1862-6300
Grant/Contract Number:  
AC36-08GO28308
Resource Type:
Accepted Manuscript
Journal Name:
Physica Status Solidi. A, Applications and Materials Science
Additional Journal Information:
Journal Volume: 214; Journal Issue: 12; Journal ID: ISSN 1862-6300
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; aluminum; interfaces; optical properties; silicon; solar cells; spectroscopic ellipsometry

Citation Formats

Subedi, Indra, Silverman, Timothy J., Deceglie, Michael G., and Podraza, Nikolas J. Al+Si Interface Optical Properties Obtained in the Si Solar Cell Configuration. United States: N. p., 2017. Web. doi:10.1002/pssa.201700480.
Subedi, Indra, Silverman, Timothy J., Deceglie, Michael G., & Podraza, Nikolas J. Al+Si Interface Optical Properties Obtained in the Si Solar Cell Configuration. United States. doi:10.1002/pssa.201700480.
Subedi, Indra, Silverman, Timothy J., Deceglie, Michael G., and Podraza, Nikolas J. Wed . "Al+Si Interface Optical Properties Obtained in the Si Solar Cell Configuration". United States. doi:10.1002/pssa.201700480. https://www.osti.gov/servlets/purl/1418122.
@article{osti_1418122,
title = {Al+Si Interface Optical Properties Obtained in the Si Solar Cell Configuration},
author = {Subedi, Indra and Silverman, Timothy J. and Deceglie, Michael G. and Podraza, Nikolas J.},
abstractNote = {Al is a commonly used material for rear side metallization in commercial silicon (Si) wafer solar cells. In this study, through-the-silicon spectroscopic ellipsometry is used in a test sample to measure Al+Si interface optical properties like those in Si wafer solar cells. Two different spectroscopic ellipsometers are used for measurement of Al+Si interface optical properties over the 1128-2500 nm wavelength range. For validation, the measured interface optical properties are used in a ray tracing simulation over the 300-2500 nm wavelength range for an encapsulated Si solar cell having random pyramidal texture. The ray tracing model matches well with the measured total reflectance at normal incidence of a commercially available Si module. The Al+Si optical properties presented here enable quantitative assessment of major irradiance/current flux losses arising from reflection and parasitic absorption in encapsulated Si solar cells.},
doi = {10.1002/pssa.201700480},
journal = {Physica Status Solidi. A, Applications and Materials Science},
number = 12,
volume = 214,
place = {United States},
year = {2017},
month = {10}
}

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