Device Physics of Thin-Film Polycrystalline Cells and Modules; Final Subcontract Report; 6 December 1993-15 March 1998

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This report describes work performed under this subcontract by Colorado State University (CSU). The results of the subcontract effort included progress in understanding CdTe and Cu(In1-xGax)Se2-based solar cells, in developing additional measurement and analysis techniques at the module level, and in strengthening collaboration within the thin-film polycrystalline solar-cell community. A major part of the CdTe work consisted of elevated-temperature stress tests to determine fabrication and operation conditions that minimize the possibility of long-term performance changes. Other CdTe studies included analysis of the back-contact junction, complete photon accounting, and the tradeoff with thin CdS between photocurrent gain and voltage loss. The ... continued below

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Sites, J. R. (Department of Physics, Colorado State University, Ft. Collins, Colorado) May 3, 1999.

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Description

This report describes work performed under this subcontract by Colorado State University (CSU). The results of the subcontract effort included progress in understanding CdTe and Cu(In1-xGax)Se2-based solar cells, in developing additional measurement and analysis techniques at the module level, and in strengthening collaboration within the thin-film polycrystalline solar-cell community. A major part of the CdTe work consisted of elevated-temperature stress tests to determine fabrication and operation conditions that minimize the possibility of long-term performance changes. Other CdTe studies included analysis of the back-contact junction, complete photon accounting, and the tradeoff with thin CdS between photocurrent gain and voltage loss. The Cu(In1-xGax)Se2 studies included work on the role of sodium in enhancing performance, the conditions under which conduction-band offsets affect cell performance, the transient effects of cycling between light and dark conditions, and detailed analysis of several individual series of cells. One aspect of thin-film module analysis has been addressing the differences in approach needed for relatively large individual cells made without grids. Most work, however, focused on analysis of laser-scanning data, including defect signatures, photocurrent/shunting separation, and the effects of forward bias or high-intensity light. Collaborations with other laboratories continued on an individual basis, and starting in 1994, collaboration was through the national R&D photovoltaic teams. CSU has been heavily involved in the structure and logistics of both the CdTe and CIS teams, as well as making frequent technical contributions in both areas.

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OSTI as DE00006805

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  • Other Information: PBD: 3 May 1999

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  • Other: DE00006805
  • Report No.: NREL/SR-520-26315
  • Grant Number: AC36-99GO10337
  • DOI: 10.2172/6805 | External Link
  • Office of Scientific & Technical Information Report Number: 6805
  • Archival Resource Key: ark:/67531/metadc709981

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  • May 3, 1999

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  • Sept. 12, 2015, 6:31 a.m.

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Sites, J. R. (Department of Physics, Colorado State University, Ft. Collins, Colorado). Device Physics of Thin-Film Polycrystalline Cells and Modules; Final Subcontract Report; 6 December 1993-15 March 1998, report, May 3, 1999; Golden, Colorado. (digital.library.unt.edu/ark:/67531/metadc709981/: accessed June 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.