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Title: Cast Polycrystalline Photovoltaic Module Manufacturing Technology Improvements; Final Subcontract Report, 8 December 199330 April 1998

Abstract

This report summarizes work performed by Solarex, A Business Unit of Amoco/Enron Solar, under this subcontract. Among the accomplishments during the program are the following: Converting all of the production casting stations to increase ingot size, operating them at equivalent yields and cell efficiencies, and thus doubling the casting capacity at a 20% lower cost than the cost of new equipment. Developing a wire-saw process and transferring the process to production; as a result, more than 80% of wafering is now done using wire saws, at higher yields and lower costs than achieved on the internal diameter saws. Developing an aluminum paste back-surface field (BSF) process to increase cell efficiency by 5%; researchers also designed, procured, and transferred to manufacturing a fully automated printing system to produce the BSF cells. Fabricating 15.2-cm by 15.2-cm polycrystalline silicon solar cells and building modules using these cells. Modifying the module assembly area to increase capacity by a factor of three. Implementing a single-layer Tedlar backsheet that reduced backsheet cost by $0.50/ft2. Selecting, testing, and qualifying a low-cost (< $1.00 per module) electrical termination system. Qualifying the structure and adhesive system for mounting frameless modules and using the system to build several large arrays.

Authors:
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
6289660
Report Number(s):
NREL/SR-520-26071
ON: DE00009779
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; CASTING; CUTTING TOOLS; MANUFACTURING; POLYCRYSTALS; PROGRESS REPORT; SILICON SOLAR CELLS; CRYSTALS; DIRECT ENERGY CONVERTERS; DOCUMENT TYPES; EQUIPMENT; FABRICATION; PHOTOELECTRIC CELLS; PHOTOVOLTAIC CELLS; SOLAR CELLS; SOLAR EQUIPMENT; TOOLS; 140000* - Solar Energy

Citation Formats

Wohlgemuth, J. Cast Polycrystalline Photovoltaic Module Manufacturing Technology Improvements; Final Subcontract Report, 8 December 199330 April 1998. United States: N. p., 1999. Web.
Wohlgemuth, J. Cast Polycrystalline Photovoltaic Module Manufacturing Technology Improvements; Final Subcontract Report, 8 December 199330 April 1998. United States.
Wohlgemuth, J. Wed . "Cast Polycrystalline Photovoltaic Module Manufacturing Technology Improvements; Final Subcontract Report, 8 December 199330 April 1998". United States.
@article{osti_6289660,
title = {Cast Polycrystalline Photovoltaic Module Manufacturing Technology Improvements; Final Subcontract Report, 8 December 199330 April 1998},
author = {Wohlgemuth, J},
abstractNote = {This report summarizes work performed by Solarex, A Business Unit of Amoco/Enron Solar, under this subcontract. Among the accomplishments during the program are the following: Converting all of the production casting stations to increase ingot size, operating them at equivalent yields and cell efficiencies, and thus doubling the casting capacity at a 20% lower cost than the cost of new equipment. Developing a wire-saw process and transferring the process to production; as a result, more than 80% of wafering is now done using wire saws, at higher yields and lower costs than achieved on the internal diameter saws. Developing an aluminum paste back-surface field (BSF) process to increase cell efficiency by 5%; researchers also designed, procured, and transferred to manufacturing a fully automated printing system to produce the BSF cells. Fabricating 15.2-cm by 15.2-cm polycrystalline silicon solar cells and building modules using these cells. Modifying the module assembly area to increase capacity by a factor of three. Implementing a single-layer Tedlar backsheet that reduced backsheet cost by $0.50/ft2. Selecting, testing, and qualifying a low-cost (< $1.00 per module) electrical termination system. Qualifying the structure and adhesive system for mounting frameless modules and using the system to build several large arrays.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {6}
}

Technical Report:
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