Download or read book Investigation of ZnSe and ZnSxSe1 x for Application in Thin Film Solar Cells written by Stephen Armstrong and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: AbstractSuccessful deposition of ZnSe and ZnS?Sei_x layers has been performed with close-spaced thermal evaporation (CSTE). ZnSe (Eg = 2.67eV) and ZnS, Sei, (Eg to 3.6eV) have the potential to replace CdS (Eg = 2.42 eV) as a buffer layer in solar cell applications, giving a two-fold benefit: (i) increased blue response of the cell, potentially allowing more light to reach the pn junction and contribute to photogeneration and (ii) reduce the toxic Cd element of the buffer layer. CSTE has produced films in which the deposition parameters can be controlled to alter the morphology of the as-deposited coatings. SEM and AFM investigations have shown that pinhole free ZnSe and ZnS?Sei_x films can be produced with this deposition process. In addition, the ZnSxSei, layers show a linear shift in lattice constant and a systematic shift in energy bandgap with alloy composition. XRD data and the steep absorption edges in the transmittance data confirm the good crystallinity of the layers. To partner the ZnSe and ZnS, Sei_x buffer layers in a thin film heterojunction, CdTe absorber layers were grown in the superstrate configuration. These CdTe layers were deposited in the same deposition chamber, without breaking vacuum, to reduce the risk of interfacial contamination. ZnSe and ZnSxSei_x / CdTe solar cells were fabricated with the best cell producing PV characteristics of: short circuit current 17mAcm-2, open circuit voltage 460mV and efficiency approaching 3%. The spectral response of all ZnSe and ZnSxSei_x / CdTe devices demonstrated a systematic shift to shorter wavelengths with increasing alloy composition, therefore showing the potential of these materials to increase solar cell efficiency. This low cost deposition process has shown excellent potential to be scaled up for commercial applications.

Download or read book Physics of Semiconductor Devices written by V. K. Jain and published by Springer Science & Business Media. This book was released on 2013-11-27 with total page 841 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this workshop is to spread the vast amount of information available on semiconductor physics to every possible field throughout the scientific community. As a result, the latest findings, research and discoveries can be quickly disseminated. This workshop provides all participating research groups with an excellent platform for interaction and collaboration with other members of their respective scientific community. This workshop’s technical sessions include various current and significant topics for applications and scientific developments, including • Optoelectronics • VLSI & ULSI Technology • Photovoltaics • MEMS & Sensors • Device Modeling and Simulation • High Frequency/ Power Devices • Nanotechnology and Emerging Areas • Organic Electronics • Displays and Lighting Many eminent scientists from various national and international organizations are actively participating with their latest research works and also equally supporting this mega event by joining the various organizing committees.

Download or read book Investigation of CZTSe Solar Cell with ZnS ZnSe and In2S3 as Buffer Layers written by Madan Morusu and published by . This book was released on 2012 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Demand for energy is ever growing and so is the demand for renewables as the fossil fuels are depleting at a rapid phase. The main goal of this thesis is to develop an optical model to calculate the optical properties of given cell like external quantum efficiency, reflectance, transmittance and maximum short circuit current. Among today's thin film technologies CIGS and CdTe are profound but the toxic nature of Cd, and hard to mine elements used in CIGS, like In, Ga make the commercial level production not feasible. The use of CZTSe which is mainly made of earth abundant materials, as absorber layer is investigated. Possible replacement materials of predominantly used buffer layer CdS such as ZnS, ZnSe and In2S3 are investigated.

Download or read book Electrochemistry of Metal Chalcogenides written by Mirtat Bouroushian and published by Springer Science & Business Media. This book was released on 2010-04-23 with total page 365 pages. Available in PDF, EPUB and Kindle. Book excerpt: The author provides a unified account of the electrochemical material science of metal chalcogenide (MCh) compounds and alloys with regard to their synthesis, processing and applications. Starting with the chemical fundamentals of the chalcogens and their major compounds, the initial part of the book includes a systematic description of the MCh solids on the basis of the Periodic Table in terms of their structures and key properties. This is followed by a general discussion on the electrochemistry of chalcogen species, and the principles underlying the electrochemical formation of inorganic compounds/alloys. The core of the book offers an insight into available experimental results and inferences regarding the electrochemical preparation and microstructural control of conventional and novel MCh structures. It also aims to survey their photoelectrochemistry, both from a material-oriented point of view and as connected to specific processes such as photocatalysis and solar energy conversion. Finally, the book illustrates the relevance of MCh materials to various applications of electrochemical interest such as (electro)catalysis in fuel cells, energy storage with intercalation electrodes, and ion sensing.

Download or read book Preparation and Evaluation of ZnSe and ZnS Sub X Se Sub 1 X Epitaxial Layers on Ge Substrates for Applications in Surface Passivation and Heterojunction Devices written by W. E. Stutius and published by . This book was released on 1984 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes a detailed study of ZnSe and ZnSxSe1-x epitaxial growth on germanium and gallium arsenide substrates, for application in surface passivation and heterojunction devices. These layers were prepared by a novel low pressure, low temperature organometallic chemical vapor deposition (OM-CVD) process. Both nominally undoped, intrinsic ZnSe and Al-doped, highly conductive n-type ZnSe were prepared by this method. Excellent epitaxial growth was achieved as indicated by the large intensity in the near bandgap photoluminescence and the rather weak intensity in the self-activated luminescence spectra. This indicates a low concentration of intrinsic and extrinsic defects and a low compensation ratio. An important relationship was observed between reproducibility of layer characteristics and substrate and reactor preparation. Also, deep center luminescence revealed that ZnSe layers deposited on both GaAs and Ge (100) surfaces have luminescence properties superior to those deposited on other substrate orientations. This study revealed a large disparity in the electrical conductivity depending on substrate orientation, of Al-doped, n-type ZnSe layers deposited both on GaAs and Ge Substrates. The defect structure of ZnSe layers grown on (100), (110), and (111)b GaAs, and on (100) and (111) Ge substrates were imaged for the first time by high resolution transmission electron microscopy. ZeSe-Ge heterojunctions were successfully fabricated and reflect the orientation dependent of interface properties and layer resistivity in their current - voltage characteristics.

Download or read book Crystal Growth Bibliography written by and published by Springer Nature. This book was released on 1981 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Transparent Conductive Zinc Oxide written by Klaus Ellmer and published by Springer. This book was released on 2009-09-02 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zinc oxide (ZnO) belongs to the class of transparent conducting oxides that can be used as transparent electrodes in electronic devices or heated windows. In this book the material properties of, the deposition technologies for, and applications of zinc oxide in thin film solar cells are described in a comprehensive manner. Structural, morphological, optical and electronic properties of ZnO are treated in this review.

Download or read book Investigation of Reactive Magnetron Sputter Deposited ZnSe for Solar Cell Application written by R. J. Stirn and published by . This book was released on 1985 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: As a higher bandgap semiconductor with reasonable lattice constant, ZnSe is an attractive alternative to CdS for heterojunction solar cells. This report presents results of one year's research into depositing high-conductivity ZnSe on glass substrates by reactive magnetron sputter deposition, using pure metal sputter targets of Zn and In, Ga, and Al dopants.

Download or read book The Investigation of Optimal Si Si1 x Ge X Thin film Solar Cells with Quantitative Analysis written by Md Amimul Ehsan and published by . This book was released on 2013 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of Cu2ZnSn SxSe1 x 4 Thin Films Prepared by Sputtering Deposition and Their Applications to Thin film Solar Cells written by and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Growth and Characterization of ZnSe ZnSxSe1 x Heterostructures on Si Substrates by Atomic Layer Epitaxy written by and published by . This book was released on 2000 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Preparation and Characterisation of Mixed ZnS ZnSe Thin Films written by Abo-Hassan Khedr M. and published by . This book was released on 1997 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polycrystalline thin films of ZnSxSe1-x (0

Download or read book Japanese Technical Abstracts written by and published by . This book was released on 1988 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Referativny zhurnal written by and published by . This book was released on 1990 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Science Abstracts written by and published by . This book was released on 1993 with total page 2334 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Japanese Technical Periodical Index written by and published by . This book was released on 1987 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2002 pages. Available in PDF, EPUB and Kindle. Book excerpt: