Download or read book High efficiency Cadmium and Zinc telluride based Thin film Solar Cells written by A. Rohatgi and published by . This book was released on 1992 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High efficiency Cadmium and Zinc telluride based Thin film Solar Cells Annual Subcontract Report 1 March 1990 28 February 1991 written by and published by . This book was released on 1992 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes research into polycrystalline CdTe solar cells grown by metal-organic chemical vapor deposition. Efficiencies of (approximately)10% were achieved using both p-i-n and p-n structures. A pre-heat treatment of CdS/SnO2/glass substrates at 450°C in hydrogen atmosphere prior to the CdTe growth was found to be essential for high performance because this heat treatment reduces oxygen-related defects from the CdS surface. However, this treatment also resulted in a Cd-deficient CdS surface, which may in part limit the CdTe cell efficiency to 10% due to Cd vacancy-related interface defects. Preliminary model calculations suggest that removing these states can increase the cell efficiency from 10% to 13.5%. Photon absorption in the CdS film also limits the cell performance, and eliminating this loss mechanism can result in CdTe efficiencies in excess of 18%. Polycrystalline, 1.7-e, CdZnTe films were also grown for tandem-cell applications. CdZnTe/CdS cells processed using the standard CdTe cell fabrication procedure resulted in 4.4% efficiency, high series resistance, and a band-gap shift to 1.55 eV. The formation of Zn-O at and near the CdZnTe surface is the source of high contact resistance. A saturated dichromate each prior to contact deposition was found to solve the contact resistance problem. The CdCl2 treatment was identified as the cause of the observed band-gap shift due to the preferred formation of ZnCl2. 59 refs.
Download or read book High Efficiency Cadmium Telluride and Zinc Telluride Based Thin film Solar Cells written by A. Rohatgi and published by . This book was released on 1992 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Efficiency Cadmium Telluride and Zinc Telluride Based Thin Film Solar Cells Annual Subcontract Report 1 March 1990 28 Februawry 1992 written by and published by . This book was released on 1992 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Efficiency Cadmium and Zinc Telluride based Thin Film Solar Cells written by A. Rohatgi and published by . This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1993 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High efficiency Cadmium and Zinc Telluride Based Thin film Solar Cells written by and published by . This book was released on 1989 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thin Film Cadmium Telluride Zinc Telluride and Mercury Zinc Telluride Solar Cells written by Ting L. Chu and published by . This book was released on 1989 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1993 with total page 1452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thin Film Cadmium Telluride Zinc Telluride and Mercury Zinc Telluride Solar Cells Final Subcontract Report 1 July 1988 31 December 1991 written by and published by . This book was released on 1992 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1993-04 with total page 1774 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thin Film Cadmium Telluride Zinc Telluride and Mercury Zinc Telluride Solar Cells written by Ting L. Chu and published by . This book was released on 1992 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thin Film Cadmium Telluride Zinc Telluride and Mercury Zinc Telluride Solar Cells written by T. L. Chu and published by . This book was released on 1992 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thin film Cadmium Telluride Photovoltaic Cells written by Alvin D. Compaan and published by . This book was released on 1993 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High efficiency Thin film Cadmium Telluride Photovoltaic Cells Annual Subcontract Report January 20 1995 January 19 1996 written by and published by . This book was released on 1996 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: This annual report covers the second year of a 3-year NREL subcontract with the University of Toledo that is focused on improvements in efficiency for radio frequency (rf)-sputtered CdS/CdTe solar cells. In earlier work supported by NREL, the University of Toledo established the viability of two new deposition methods for CdS/CdTe solar cells by fabricating cells with efficiencies greater than 10% at air mass (AM) 1.5 on soda lime glass for all-sputtered cells and also for all-laser-deposited cells. Most of the effort has been placed on radio frequency sputtering (RFS) because it was judged to be more economical and more easily scaled to large-area deposition. However, laser physical vapor deposition (LPVD) has remained the method of choice for the deposition of CdCl2 layers and also for the exploration of new materials such as the ternary alloys including CdS(subscript x) Te{sub 1-x} and dopants such as Cu in ZnTe.
Download or read book Thin film Cadmium Telluride Solar Cells written by Ting L. Chu and published by . This book was released on 1986 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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