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Title: PV Optics: A Software Package for Solar Cells and Module Design

Abstract

PV Optics is a user-friendly software package developed to design and analyze solar cells and modules. It is applicable to a variety of optical structures, including thin and thick cells with light-trapping structures and metal optics. Using a combination of wave and ray optics to include effects of coherence and interference, it can be used to design single-junction and multijunction solar cells and modules. This paper describes some basic applications of PV Optics for crystalline and amorphous Si solar cell design. We present examples to examine the effects on solar cell performance of wafer thickness, antireflection coating thickness, texture height, and metal loss.

Authors:
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
982278
DOE Contract Number:
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: Optical Modeling and Measurements for Solar Energy Systems; Proceedings of the SPIE, Vol. 6652
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; 97 MATHEMATICS AND COMPUTING; ANTIREFLECTION COATINGS; COMPUTER CODES; DESIGN; HEIGHT; INTERFERENCE; METALS; OPTICAL PROPERTIES; OPTICS; PERFORMANCE; PROCEEDINGS; COMPUTERIZED SIMULATION; SILICON SOLAR CELLS; SOLAR CELLS; SOLAR ENERGY; TEXTURE; THICKNESS; Solar Energy - Photovoltaics

Citation Formats

Sopori, B. PV Optics: A Software Package for Solar Cells and Module Design. United States: N. p., 2007. Web. doi:10.1117/12.736550.
Sopori, B. PV Optics: A Software Package for Solar Cells and Module Design. United States. doi:10.1117/12.736550.
Sopori, B. Mon . "PV Optics: A Software Package for Solar Cells and Module Design". United States. doi:10.1117/12.736550.
@article{osti_982278,
title = {PV Optics: A Software Package for Solar Cells and Module Design},
author = {Sopori, B.},
abstractNote = {PV Optics is a user-friendly software package developed to design and analyze solar cells and modules. It is applicable to a variety of optical structures, including thin and thick cells with light-trapping structures and metal optics. Using a combination of wave and ray optics to include effects of coherence and interference, it can be used to design single-junction and multijunction solar cells and modules. This paper describes some basic applications of PV Optics for crystalline and amorphous Si solar cell design. We present examples to examine the effects on solar cell performance of wafer thickness, antireflection coating thickness, texture height, and metal loss.},
doi = {10.1117/12.736550},
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
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

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  • This paper describes some applications of a new optics software package, PV Optics, developed for the optical design of solar cells and modules. PV Optics is suitable for the analysis and design of both thick and thin solar cells. It also includes a feature for calculation of metallic losses related to contacts and back reflectors.
  • A brief description of the capabilities of PV Optics, a software package for the design and analysis of solar cells and modules, is given. Some specific applications of the software for the design of thick- and thin-film cells are given.
  • This paper describes the key performance characteristics of a static concentrator called 2X Cusp Concentrator Module (2XCCM). At this low concentration ratio of 2 the module needs only half of the cells required by a conventional flat-plate module. A prototype, using 14% to 14.5% efficient dendritic wed bifacial silicon solar cells was completed in 1990 and subsequently subjected to indoor and outdoor testing. The module produced 39.75 watts at 10.9% efficiency when flash tested indoors. Outdoors the module produced 33.1 Watts at 8.75%. The drop in performance was attributed to soiling of the mirrors and cell fractures. The module generatedmore » about 60% of its power output from the cells front surface and 40% from the back surface. In most respects the module performed like a flat-plate module except that its operating temperature was somewhat higher. A cost analysis showed that at an improved module efficiency of 12.8%, using 15%/14% bifacial c/ells and at a cell cost of $1.33/Watt, the module cost coefficient would be $2/Watt.« less
  • This paper describes major features of a new optical software package, PV Optics, and presents a brief summary of the results of applying this program to analyze amorphous silicon solar cells. Some examples are given, mainly to demonstrate the nature of calculations that can be performed with this program for a-Si cell design.
  • A software package for passive solar design analysis was developed. This package is based on the Los Alamos Scientific Laboratories Solar/Load Ratio (LASL SLR) method, and utilizes the most current features of this method. Further algorithms allow calculation of solar radition on a tilted, shaded aperture at any azimuth. This offers increased flexibility in calculating the shading from a fixed overhang. In addition, the program takes into account the effects of: variable number of glazings; glazing properties and thickness; diffuse ground reflectance; radiation enhancement from a specular reflector of variable dimensions placed at the base of a vertical, south-facing aperture;more » thermal storage wall or direct gain system absorptance; thermostat set temperature; internal heat generation; and variable R value of the night insulation. The package can combine the effect of up to five types of passive subsystems on the overall performance of the building. Outputs from the program are the monthly values for transmitted radiation, the monthly and annual values of the Solar Savings Fraction and auxiliary energy requirements. The package also includes a building heat loss program and an economics program. The package has been programmed for the TI-59 calculator and for the Radio Shack TRS-80 microcomputer. Comparisons between the results obtained from the software package and the results obtained from tabular methods are presented.« less