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Title: Light Trapping in Solar Cells: Theory and Practical Implementation

Abstract

Light trapping is a mechanism for creating enhanced absorption in a material, beyond that of a parallel polished wafer of the same material and the same thickness. Light trapping is an important feature of all solar cells, because it allows the use of thinner cells that perform equally or better than thick cells. A thinner cell leads to lower-volume recombination of photogenerated carriers, leading to higher cell performance. Thinner wafers can also help minimize the use of semiconducting material, therefore lowering the energy cost further. Light trapping in a wafer or a solar cell requires rough or textured surface(s); hence the detailed optics of light trapping is somewhat difficult to carry out. We have developed a software package, PV Optics, which performs light-trapping calculations for solar cell applications. It determines optical absorption for a given structure and calculates photocurrent available from a given solar cell structure for many cases, such as when the cell is placed directly in the sun or encapsulated in a module. The cell can have a single- or multiple-junction configuration. This paper will review the principles of light trapping and practical approaches to incorporate effective light trapping in silicon solar cells. We will demonstrate typical usemore » of PV Optics for the design of crystalline and amorphous silicon solar cells.« less

Authors:
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy Solar Energy Program
OSTI Identifier:
1120063
DOE Contract Number:
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: Linking Science and Technology for Global Solutions: Technical Program of the Minerals, Metals & Materials Society (TMS) 136th Annual Meeting and Exhibition, 25 February-1 March 2007, Orlando, Florida
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; Solar Energy - Photovoltaics

Citation Formats

Sopori, B. Light Trapping in Solar Cells: Theory and Practical Implementation. United States: N. p., 2007. Web.
Sopori, B. Light Trapping in Solar Cells: Theory and Practical Implementation. United States.
Sopori, B. Mon . "Light Trapping in Solar Cells: Theory and Practical Implementation". United States. doi:.
@article{osti_1120063,
title = {Light Trapping in Solar Cells: Theory and Practical Implementation},
author = {Sopori, B.},
abstractNote = {Light trapping is a mechanism for creating enhanced absorption in a material, beyond that of a parallel polished wafer of the same material and the same thickness. Light trapping is an important feature of all solar cells, because it allows the use of thinner cells that perform equally or better than thick cells. A thinner cell leads to lower-volume recombination of photogenerated carriers, leading to higher cell performance. Thinner wafers can also help minimize the use of semiconducting material, therefore lowering the energy cost further. Light trapping in a wafer or a solar cell requires rough or textured surface(s); hence the detailed optics of light trapping is somewhat difficult to carry out. We have developed a software package, PV Optics, which performs light-trapping calculations for solar cell applications. It determines optical absorption for a given structure and calculates photocurrent available from a given solar cell structure for many cases, such as when the cell is placed directly in the sun or encapsulated in a module. The cell can have a single- or multiple-junction configuration. This paper will review the principles of light trapping and practical approaches to incorporate effective light trapping in silicon solar cells. We will demonstrate typical use of PV Optics for the design of crystalline and amorphous silicon solar cells.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Conference:
Other availability
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