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Book Energy Research Abstracts

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:

Book Thin Film Cadmium Telluride Zinc Telluride and Mercury Zinc Telluride Solar Cells Final Subcontract Report 1 July 1988 31 December 1991

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:

Book Government reports annual index

Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1726 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Government Reports Announcements Index

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1992-12 with total page 920 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book High Efficiency Cadmium Telluride and Zinc Telluride Based Thin Film Solar Cells Annual Subcontract Report 1 March 1990 28 Februawry 1992

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:

Book Thin Film Cadmium Telluride Zinc Telluride and Mercury Zinc Telluride Solar Cells

Download or read book Thin Film Cadmium Telluride Zinc Telluride and Mercury Zinc Telluride Solar Cells written by and published by . This book was released on 1992 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes research to demonstrate (1) thin film cadmium telluride solar cells with a quantum efficiency of 75% or higher at 0. 44?m and a photovoltaic efficiency of 11.5% or greater, and (2) thin film zinc telluride and mercury zinc telluride solar cells with a transparency to sub-band-gap radiation of 65% and a photovoltaic conversion efficiency of 5% and 8%, respectively. Work was directed at (1) depositing transparent conducting semiconductor films by solution growth and metal-organic chemical vapor deposition (MOCVD) technique, (2) depositing CdTe films by close-spaced sublimation (CSS) and MOCVD techniques, (3) preparing and evaluating thin film CdTe solar cells, and (4) preparing and characterizing thin film ZnTe, CD{sub 1-x}Zn{sub 1-x}Te, and Hg{sub 1-x}ZnxTe solar cells. The deposition of CdS films from aqueous solutions was investigated in detail, and their crystallographic, optical, and electrical properties were characterized. CdTe films were deposited from DMCd and DIPTe at 400°C using TEGa and AsH3 as dopants. CdTe films deposited by CSS had significantly better microstructures than those deposited by MOCVD. Deep energy states in CdTe films deposited by CSS and MOCVD were investigated. Thin films of ZnTe, Cd{sub 1- x}ZnxTe, and Hg{sub 1-x}ZnxTe were deposited by MOCVD, and their crystallographic, optical, and electrical properties were characterized. 67 refs.

Book Thin film Cadmium Telluride Solar Cells

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 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book High efficiency Cadmium and Zinc telluride based Thin film Solar Cells Annual Subcontract Report 1 March 1990 28 February 1991

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.

Book Thin film Cadmium Telluride Photovoltaic Cells

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: