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Characterization Of Cadmium Zinc Telluride Solar Cells
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Book Synopsis Characterization of Cadmium Zinc Telluride Solar Cells by : Gowri Sivaraman
Download or read book Characterization of Cadmium Zinc Telluride Solar Cells written by Gowri Sivaraman and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Different post deposition heat treatments were carried out to determine their effect on film and device properties. Characterization of the CZT devices was done using XRD, EDS, SIMS, J-V and spectral response measurements. CZT (Eg%7E1.7 eV) /CdS exhibited best performance when compared to the other window layers investigated. The best device exhibited Voc=640mV, FF=40% and Jsc=4.5 mA/cm2. The theoretical performance of CZT based solar cells were investigated using SCAPS. The effect of bulk and interface defects on the device parameters were studied.
Book Synopsis Characterization of Cadmium Zinc Telluride Solar Cells by RF Sputtering by : Senthilnathan Subramanian
Download or read book Characterization of Cadmium Zinc Telluride Solar Cells by RF Sputtering written by Senthilnathan Subramanian and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Characterization of the films was done using transmission response, X-ray diffraction (XRD), Atomic Force Microscopy (AFM), Secondary Electron Microscopy (SEM), current-voltage (I-V) and spectral response measurements. CZT deposited on CdS/SnOb2.
Book Synopsis Characterization of Cadmium Zinc Telluride Films and Solar Cells on Glass and Flexible Substrates by Rf Sputtering by : Jagadish Gaduputi
Download or read book Characterization of Cadmium Zinc Telluride Films and Solar Cells on Glass and Flexible Substrates by Rf Sputtering written by Jagadish Gaduputi and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: The effect of post deposition treatments and the effect of N2 during sputtering on CZT device performance were studied.
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. 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 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 Multi-wavelength Characterization of Cadmium Telluride Solar Cell -- Development of Q-EBIC and NSOM Measurement Techniques by : Anthony Giacomo Gianfrancesco
Download or read book Multi-wavelength Characterization of Cadmium Telluride Solar Cell -- Development of Q-EBIC and NSOM Measurement Techniques written by Anthony Giacomo Gianfrancesco and published by . This book was released on 2013 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Thin-film inorganic solar cells, such as CdTe, have demonstrated the most promise to date for a viable low-cost renewable energy resource. Their current performance, however, is far from the theoretical limit suffering from significant charge recombination losses due to grain boundaries and point defects. It is likely that the microscopic compositions of grain bulk and grain boundaries are significantly different and not optimal for the overall device performance. Good understanding of charge transport along and across the grain boundaries and other microscopic interfaces is lacking, preventing the development of reliable and predictive device models. The insufficient microscopic understanding hinders efficient characterization of photovoltaic materials and also holds back the development of process control techniques. We first show preliminary results for a novel technique, quantum-dot electron-beam induced current to characterize semiconductors in the near-field. We also propose the use of near-field optical scanning microscopy for high precision optical excitation and for local, high-resolution characterization. These imaging techniques are examined with the goal of synthesizing information obtained by both methods, of material phenomena at the relevant length scales, to other measurement methods. The most important nanoscale phenomena being the separation of compositional and electrical effects.
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-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 Characterization of Deep Level States in Cadmium Telluride Thin-film Solar Cells by the Steady-state Photocapacitance Method by : Toru Takamiya
Download or read book Characterization of Deep Level States in Cadmium Telluride Thin-film Solar Cells by the Steady-state Photocapacitance Method written by Toru Takamiya and published by . This book was released on 2005 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Characterization of Large Area Cadmium Telluride Films and Solar Cells Deposited on Moving Substrates by Close Spaced Sublimation by : Vishwanath Kumar
Download or read book Characterization of Large Area Cadmium Telluride Films and Solar Cells Deposited on Moving Substrates by Close Spaced Sublimation written by Vishwanath Kumar and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Films deposited under various conditions were studied to improve our understanding of the influence of processing conditions on device performance. The key advantage of this technique over others is its high deposition rate, simplicity of operation and high conversion efficiency. Typical deposition times were two minutes and could be reduced to as low as 45 sec with little variation in performance. The four major parameters that influence the films prepared by close spaced sublimation, namely substrate temperature, source temperature, ambient pressure, and spacing were optimized for best device performance. The influence of each parameter on deposition rate and cell efficiency was also studied. The best cells produced by this technology had an efficiency of 13% with Voc=830 mV, FF= 74% and Jsc=21.1 mA/cm2.
Book Synopsis Characterization of Cadmium Telluride Grain Boundaries in Cadmium Telluride/cadmium Sulfide Solar Cells by : Lawrence M. Woods
Download or read book Characterization of Cadmium Telluride Grain Boundaries in Cadmium Telluride/cadmium Sulfide Solar Cells written by Lawrence M. Woods and published by . This book was released on 2000 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Characterization of P-type Electrochemically Deposited Cadmium Telluride Films and Their Application to Solar Cells by : Szu-tsun Simon Ou
Download or read book Characterization of P-type Electrochemically Deposited Cadmium Telluride Films and Their Application to Solar Cells written by Szu-tsun Simon Ou and published by . This book was released on 1983 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Optical-electrical Characterization of the P-N Junction and Window Layers of Cadmium Telluride Based Solar Cells by : Jason Stoke
Download or read book Optical-electrical Characterization of the P-N Junction and Window Layers of Cadmium Telluride Based Solar Cells written by Jason Stoke and published by . This book was released on 2012 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis CHARACTERIZATION OF CADMIUM-ZINC TELLURIDE CRYSTALS GROWN BY 'CONTACTLESS' PVT USING SYNCHROTRON WHITE BEAM... NASA by :
Download or read book CHARACTERIZATION OF CADMIUM-ZINC TELLURIDE CRYSTALS GROWN BY 'CONTACTLESS' PVT USING SYNCHROTRON WHITE BEAM... NASA written by and published by . This book was released on 1999* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thin Film Solar Cells by : Jef Poortmans
Download or read book Thin Film Solar Cells written by Jef Poortmans and published by John Wiley & Sons. This book was released on 2006-10-16 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thin-film solar cells are either emerging or about to emerge from the research laboratory to become commercially available devices finding practical various applications. Currently no textbook outlining the basic theoretical background, methods of fabrication and applications currently exist. Thus, this book aims to present for the first time an in-depth overview of this topic covering a broad range of thin-film solar cell technologies including both organic and inorganic materials, presented in a systematic fashion, by the scientific leaders in the respective domains. It covers a broad range of related topics, from physical principles to design, fabrication, characterization, and applications of novel photovoltaic devices.
