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Thin Film Cadmium Telluride Zinc Telluride And Mercury Zinc Telluride Solar Cells
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Book Synopsis Thin Film Cadmium Telluride, Zinc Telluride, and Mercury Zinc Telluride Solar Cells by :
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 Synopsis Thin Film Cadmium Telluride, Zinc Telluride, and Mercury Zinc Telluride Solar Cells by : Ting L. Chu
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:
Book Synopsis Thin Film Cadmium Telluride, Zinc Telluride, and Mercury Zinc Telluride Solar Cells. Final Subcontract Report, 1 July 1988--31 December 1991 by :
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 Synopsis Thin Film Cadmium Telluride, Zinc Telluride, and Mercury Zinc Telluride Solar Cells by : Ting L. Chu
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:
Book Synopsis Thin Film Cadmium Telluride, Zinc Telluride, and Mercury Zinc Telluride Solar Cells by : T. L. Chu
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:
Book Synopsis High Efficiency Cadmium Telluride and Zinc Telluride Based Thin-film Solar Cells by :
Download or read book High Efficiency Cadmium Telluride and Zinc Telluride Based Thin-film Solar Cells written by and published by . This book was released on 1992 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes work to improve the basic understanding of CdTe and ZnTe alloys by growing and characterizing these films along with cell fabrication. The major objective was to develop wide-band-gap (1.6--1.8 eV) material for the top cell, along with compatible window material and transparent ohmic contacts, so that a cascade cell design can be optimized. Front-wall solar cells were fabricated with a glass/SnO2/CdS window, where the CdS film is thin to maximize transmission and current. Wide-band-gap absorber films (E{sub g} = 1.75 eV) were grown by molecular beam epitaxy (MBE) and metal-organic chemical vapor deposition (MOCVD) techniques, which provided excellent control for tailoring the film composition and properties. CdZnTe films were grown by both MBE and MOCVD. All the as-grown films were characterized by several techniques (surface photovoltage spectroscopy, Auger electron spectroscopy (AES), and x-ray photoelectron spectroscopy (XPS)) for composition, bulk uniformity, thickness, and film and interface quality. Front-wall-type solar cells were fabricated in collaboration with Ametek Materials Research Laboratory using CdTe and CdZnTe polycrystalline absorber films. The effects of processing on ternary film were studied by AES and XPS coupled with capacitance voltage and current voltage measurements as a function of temperature. Bias-dependent spectral response and electrical measurements were used to test some models in order to identify and quantify dominant loss mechanisms.
Book Synopsis Thin Films and Solar Cells of Cadmium Telluride and Cadmium Zinc Telluride by : Christos Savva Ferekides
Download or read book Thin Films and Solar Cells of Cadmium Telluride and Cadmium Zinc Telluride written by Christos Savva Ferekides and published by . This book was released on 1991 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High Efficiency Cadmium and Zinc Telluride-based Thin Film Solar Cells by :
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 1990 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polycrystalline Cd{sub 1-x}Zn(subscript x)Te and Cd{sub 1-x}Mn(subscript x)Te films with a band gap of 1.7 eV were successfully grown on glass/SnO2/CdS substrates by molecular beam epitaxy (MBE) and metal-organic chemical vapor deposition (MOCVD), respectively. Polycrystalline Cd{sub 1-x}Zn(subscript x)Te films grown by MBE resulted in uniform composition and sharp interfaces. However, polycrystalline Cd{sub 1-x}Mn(subscript x)Te films grown by MOCVD showed nonuniform compositions and evidence of manganese accumulation at the Cd{sub 1-x}Mn(subscript x)Te/CdS interface. We found that manganese interdiffuses and replaces cadmium in the CdS film. By improving the CdTe/CdS interface and, thus, reducing the collection function effects, the efficiency of the MOCVD CdTe cell can be improved to about 13.5%. MBE-grown CdTe cells also produced 8%--9% efficiencies. The standard CdTe process was not optimum for ternary films and resulted in a decrease in the band gap. Recent results indicate that CdCl2 + ZnCl2 chemical treatment may prevent the band-gap reduction, and that chromate etch (rather than bromine etch) may provide the solution to contact resistance in the ternary cells.
Book Synopsis High Efficiency Cadmium and Zinc Telluride Based Thin Film Solar Cells by : A. Rohatgi
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 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thin Film Cadmium Telluride, Zinc Telluride, and Mercury Zinc Telluride Solar Cells by : Ting L. Chu
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 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Galvanic Deposition of Mercury Zinc Telluride and Copper-doped Mercury Zinc Telluride on CdTe Solar Cells by : Jeremy Thomas Kampp
Download or read book Galvanic Deposition of Mercury Zinc Telluride and Copper-doped Mercury Zinc Telluride on CdTe Solar Cells written by Jeremy Thomas Kampp and published by . This book was released on 1999 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High-efficiency Cadmium and Zinc Telluride Based Thin-film Solar Cells by :
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:
Book Synopsis Thin-film Cadmium Telluride and Zinc Phosphide Solar Cells by : Ting L. Chu
Download or read book Thin-film Cadmium Telluride and Zinc Phosphide Solar Cells written by Ting L. Chu and published by . This book was released on 1984 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report on thin-film cadmium telluride and zinc phosphide solar cells describes work on the deposition of CdTe films by direct combination of Cd and Te vapor on foreign substrates, with emphasis on the resistivity control of p-type films and on the reduction of p-CdTe/substrate interface resistance. CdTe films deposited on graphite substrates were all p-type, regardless of substrate temperature or reactant composition. Deposition and characterization of window materials also continued. Thin-film CdTe heterojunction solar cells were also prepared and characterized. The best CdS/CdTe cells in this work have had an AM1 efficiency of about 6.5% and the best ITO/CdTe cell to date has had an AM1 efficiency of about 8%.
Book Synopsis High Efficiency Cadmium and Zinc Telluride-based Thin Film Solar Cells by : A. Rohatgi
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:
Book Synopsis Thin-film Cadmium Telluride and Zinc Phosphide Solar Cells by : Ting L. Chu
Download or read book Thin-film Cadmium Telluride and Zinc Phosphide Solar Cells written by Ting L. Chu and published by . This book was released on 1984 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report on thin-film cadmium telluride and zinc phosphide solar cells describes work on the deposition of CdTe films by direct combination of Cd and Te vapor on foreign substrates, with emphasis on the resistivity control of p-type films and on the reduction of p-CdTe/substrate interface resistance. CdTe films deposited on graphite substrates were all p-type, regardless of substrate temperature or reactant composition. Deposition and characterization of window materials also continued. Thin-film CdTe heterojunction solar cells were also prepared and characterized. The best CdS/CdTe cells in this work have had an AM1 efficiency of about 6.5% and the best ITO/CdTe cell to date has had an AM1 efficiency of about 8%.
Book Synopsis High Efficiency Cadmium Telluride and Zinc Telluride Based Thin-Film Solar Cells, Annual Subcontract Report, 1 March 1990 - 28 Februawry 1992 by :
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 Synopsis Mercury Cadmium Telluride by : Peter Capper
Download or read book Mercury Cadmium Telluride written by Peter Capper and published by John Wiley & Sons. This book was released on 2011-06-20 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mercury cadmium telluride (MCT) is the third most well-regarded semiconductor after silicon and gallium arsenide and is the material of choice for use in infrared sensing and imaging. The reason for this is that MCT can be ‘tuned’ to the desired IR wavelength by varying the cadmium concentration. Mercury Cadmium Telluride: Growth, Properties and Applications provides both an introduction for newcomers, and a comprehensive review of this fascinating material. Part One discusses the history and current status of both bulk and epitaxial growth techniques, Part Two is concerned with the wide range of properties of MCT, and Part Three covers the various device types that have been developed using MCT. Each chapter opens with some historical background and theory before presenting current research. Coverage includes: Bulk growth and properties of MCT and CdZnTe for MCT epitaxial growth Liquid phase epitaxy (LPE) growth Metal-organic vapour phase epitaxy (MOVPE) Molecular beam epitaxy (MBE) Alternative substrates Mechanical, thermal and optical properties of MCT Defects, diffusion, doping and annealing Dry device processing Photoconductive and photovoltaic detectors Avalanche photodiode detectors Room-temperature IR detectors
