DOE Solar Energy Technologies Program

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DOE Solar Energy Technologies Program ( doe-solar-energy-technologies-program )

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Performing Organizations: Key Technical Contact: DOE HQ Technology Manager: FY 2005 Budget: Thin Film PV Partnership National Renewable Energy Laboratory (NREL) DOE Golden Field Office (DOE/GO) Ken Zweibel (NREL), 303-384-6441, ken_zweibel@nrel.gov Jeffrey Mazer, 202-586-2455, jeffrey.mazer@ee.doe.gov $9,096K (NREL) ____________________________________________________________________________________ Objectives • Support the near-term transition to first-time manufacturing and commercial introduction of reliable thin-film a-Si, CIS, CdTe, and film silicon modules. • Build a technology base upon which these advanced PV technologies can successfully improve manufacturing and continue to progress in terms of performance, reliability, and reduced cost for products meant to compete in the PV marketplace. • Sustain innovation to support progress toward ambitious long-term PV cost and performance goals (e.g., 15% modules at under $50/m2 and capable of lasting 30 years) appropriate for cost- competitive PV electricity. Accomplishments • Met four Joule milestones. • Two Technology Partners broke ground on major manufacturing expansions (First Solar 50 MWp, and Uni-Solar 25 MWp). • Production of thin films in the United States grew from 12 MWp in 2003 to an estimated >40 MWp in 2005. Future Directions • Continue to address key issues supporting the transition to successful first-time manufacturing or major production expansion in each thin film. • Significantly reduce CIS and CdTe layer thicknesses in cells and support transfer of this to manufacturing. • Direct CdTe research toward higher voltage. • Investigate nanocrystalline bottom cells for thin-film silicon multijunctions. ____________________________________________________________________________________ 1. Introduction Thin-film PV technologies are regarded as having good potential to meet ambitious cost and performance goals consistent with the DOE Solar Program Multi-Year Technical Plan (MYTP) long- term goals for low-cost PV and the PV industry’s 20-year roadmap. The Thin Film PV Partnership is designed to accelerate progress toward those goals. It includes subcontracted R&D in CIS, CdTe, amorphous silicon, and new thin films such as film silicon. The Partnership works closely with NREL’s internal research, facilitating collaborative activities through the Partnership’s National Research Teams. Three National R&D Teams work in material-specific areas (a-Si/thin film c-Si, CdTe, and CIGS), and there are crosscutting Photovoltaic R&D Advanced Materials and Devices teams in Thin Film Module Reliability and EH&S (the latter with Brookhaven National Laboratory). The National Teams are made up of leading researchers from U.S. industry, universities, and NREL, who work together to define and carry out shared activities. 2. Technical Approach The Partnership had about 30 subcontracts (see below) during FY 2005, about eight of which are ending. The subcontract areas were broken down as shown in Table 1. 42

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