Research Leading to High Throughput Processing of Thin-Film CdTe PV Module: Phase I Annual Report, October 2003 (Revised)

Powell, R. C. ; Meyers, P. V.

National Renewable Energy Laboratory (U.S.)

关键词: Solar Energy;    Heat Flux;    Pv;    Transport Pv;    Solar Energy - Photovoltaics;   

DOI  :  10.2172/15006751
RP-ID  :  NREL/SR-520-35348
RP-ID  :  AC36-99-GO10337
RP-ID  :  15006751

美国|英语

来源: UNT Digital Library

【 摘 要 】

Work under this subcontract contributes to the overall manufacturing operation. During Phase I, average module efficiency on the line was improved from 7.1% to 7.9%, due primarily to increased photocurrent resulting from a decrease in CdS thickness. At the same time, production volume for commercial sale increased from 1.5 to 2.5 MW/yr. First Solar is committed to commercializing CdTe-based thin-film photovoltaics. This commercialization effort includes a major addition of floor space and equipment, as well as process improvements to achieve higher efficiency and greater durability. This report presents the results of Phase I of the subcontract entitled''Research Leading to High Throughput Processing of Thin-Film CdTe PV Modules.'' The subcontract supports several important aspects needed to begin high-volume manufacturing, including further development of the semiconductor deposition reactor, advancement of accelerated life testing methods and understanding, and improvements to th e environmental, health, and safety programs. Progress in the development of the semiconductor deposition reactor was made in several areas. First, a new style of vapor transport deposition distributor with simpler operational behavior and the potential for improved cross-web uniformity was demonstrated. Second, an improved CdS feed system that will improve down-web uniformity was developed. Third, the core of a numerical model of fluid and heat flow within the distributor was developed, including flow in a 3-component gas system at high temperature and low pressure and particle sublimation.