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Title: Photovoltaic Cz silicon module improvements. Annual technical progress report, November 9, 1995--November 8, 1996

Work focused on reducing the cost per watt of Cz silicon photovoltaic modules under Phase I of Siemens Solar Industries` DOE/NREL PVMaT 4A subcontract is described. Module cost components are analyzed and solutions to high-cost items are discussed in terms of specific module designs. The approaches of using larger cells and modulus to reduce per-part processing cost, and of minimizing yield loss are particularly leveraging. Yield components for various parts of the fabrication process and various types of defects are shown, and measurements of the force required to break wafers throughout the cell fabrication sequence are given. The most significant type of yield loss is mechanical breakage. The implementation of statistical process control on key manufacturing processes at Siemens Solar Industries is described. Module configurations prototyped during Phase I of this project and scheduled to begin production in Phase II have a projected cost per watt reduction of 19%.
Authors:
; ;  [1]
  1. Siemens Solar Industries, Camarillo, CA (United States)
Publication Date:
OSTI Identifier:
572747
Report Number(s):
NREL/SR--520-24065
ON: DE98004270; TRN: 98:001340
DOE Contract Number:
AC36-83CH10093
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Feb 1998
Research Org:
National Renewable Energy Lab., Golden, CO (United States)
Sponsoring Org:
USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; PROGRESS REPORT; SILICON; PHOTOVOLTAIC CELLS; OPTIMIZATION; COST ESTIMATION; PRODUCTIVITY; MANUFACTURING