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Studies And Characterization Of Zns Thin Films
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Book Synopsis Studies and Characterization of ZnS Thin Films by : Arunkumar Alagesan
Download or read book Studies and Characterization of ZnS Thin Films written by Arunkumar Alagesan and published by LAP Lambert Academic Publishing. This book was released on 2017-06-19 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: The II-VI compound semiconductors are of great importance due to their application in various electro-optic devices. Thin films of ZnS find many more applications in the area of opto electronic device fabrication like UV light emitting diodes, blue light emitting diodes, emissive flat screens, electroluminescent devices and antireflection coating in solar cell technology. Several methods have been used to prepare ZnS thin films. We have deposited ZnS films using chemical bath deposition method using sodium hydroxide as a complexing agent. The structural and morphological characteristics of films have been investigated by X-ray diffraction (XRD) and scanning electron microscope. XRD shows deposited film was polycrystalline nature with cubic structure. The grain size is estimated to be in the range of 35-70 nm. The crystallinity of the ZnS film was analysed by HRTEM with the help of the electron diffraction pattern. The films show good optical properties with high transmittance in the visible region and the band gap value were found 3.3 eV - 2.1 eV. ZnS films can be used as buffer layers on CdTe solar cells.
Book Synopsis Characterization of ZnS Thin Films Grown by MOCVD by : Jie Fang
Download or read book Characterization of ZnS Thin Films Grown by MOCVD written by Jie Fang and published by . This book was released on 1992 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of in situ methods for process monitoring and control and characterization of Cu-Zn-Sn-S based thin films by : Van Duren, Stephan
Download or read book Development of in situ methods for process monitoring and control and characterization of Cu-Zn-Sn-S based thin films written by Van Duren, Stephan and published by Universitätsverlag der TU Berlin. This book was released on 2019-06-03 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, kesterite Cu2ZnSnS4 (CZTS) has become an interesting alternative to copper indium gallium (di)selenide (CIGS) due to its non-toxic and earth abundant constituents. A variety of methods is being used to fabricate kesterite thin films, such as coevaporation, sputtering, electrodeposition, spray pyrolysis and others. Most of them include an annealing step to stimulate elemental mixing and interdiffusion. Although conversion efficiencies of kesterite solar cells have increased among different research groups, the record value of 12.6% set by IBM in 2014 has not been broken yet. Therefore, experimental and theoretical studies are needed to predict the effect of the secondary phases and detrimental defects on the electronical properties of the CZTS based solar devices. The work presented here studies non-destructive techniques for in situ process control and monitoring. With the aim to detect phases and phase transitions to optimize crucial processing steps such as pre-annealing of metal precursors, high temperature annealing and vacuum deposition of Cu-Sn-Zn-S based thin films. The research consists of three parts in which Raman spectroscopy, X-ray diffraction (XRD) and reflectometry are used to explore this objective. In the first part Raman spectroscopy is investigated as an in situ monitoring technique during high temperature annealing of thin films. It investigates whether the occurrence of CZTS can be monitored when it is created from annealing a Mo/CTS/ZnS layered thin film. CuS, SnS, ZnS and CTS (Cu-Sn-S) films are prepared by physical vapor deposition. The Raman scattering intensity was compared to investigate whether their specific vibrational modes can be distinguished from each other at room temperature. Then, the CTS film is annealed between 50 and 550 °C in order to investigate whether CTS vibrational modes can be identified at elevated temperatures and to see which transitions take place within the thin film. Also, a CZTS reference film is annealed between 50 and 550 °C for reference purposes. The temperature dependence of the main CZTS modes is examined to investigate whether it can be used for in situ temperature control. Finally, a ZnS layer is deposited on the unannealed CTS film to obtain a Mo/CTS/ZnS layered film. This film is used to study the conversion of CTS/ZnS into CZTS at elevated temperatures. It was found that Raman spectroscopy can successfully be used to monitor formation of CZTS by identifying its main vibrational mode during the annealing process. The intensity of the CTS modes reduces at elevated temperatures. At 450 °C, the main CZTS mode at 338 cm-1 can be clearly identified. The second part also focuses on high temperature annealing. However, in this part the focus lies on annealing of the metal precursor films. It is explored whether specific alloys benefit or hinder the formation of secondary phases during formation of the CZTS absorber films. Also, to what extent this influences solar cell performance. In situ XRD was investigated for in situ monitoring of the pre-annealing process. Cu-poor metal precursor films are prepared by sputtering deposition. The precursors are annealed at 150 °C, 200 °C, 300 °C and 450 °C in a three zone tube furnace. The effect on the structural properties is analysed by XRD to study the formation mechanism of alloys. The precursor films are then sulfurized in a three zone tube furnace. The structural properties of the absorber are analysed and correlated with structures in the precursor. It is found that formation of SnS2 in the absorber is proportional to the remaining Sn in the pre-annealed precursor. Also, electron micrographs showed that pre-annealing temperature influences grain growth and surface precipitation of Sn-S and Zn-S. Pre-annealed absorbers at 450 °C did not exhibit these phases on the surface. Solar devices are fabricated from the absorber films and best performing devices were obtained from pre-annealed absorbers at 450 °C. They showed absence of Sn and SnS2 in, respectively, the precursor and absorber. It could be concluded that SnS2 phases are detrimental to device efficiency and that SnS2 XRD peak intensity follows an inverse proportionality with device efficiency. The third part explores reflectometry as a method to monitor a growing film during thermal evaporation in a physical vapor deposition (PVD) system. A set of six CZTS absorbers is examined by ex situ Raman spectroscopy and reflectometry to study the influence of secondary phases CuS and ZnS on reflection spectra. Composition strongly influences reflection spectra and CuS leaves a characteristic dip in the reflection spectrum at about 600 nm. An integration method was used to analyze this phenomenon quantitatively. Subsequently, a reflectometry setup is designed, developed and integrated in the PVD system. Four different CZTS co-evaporated and multi-layered films are deposited. Structural, morphological and vibrational properties are investigated. The reflection spectra are monitored during deposition and time-dependent reflection spectra are analyzed for characteristic aspects related to properties such as thickness, band gap and phase formation. CuS could not be detected in the films by the integration method due to the superposition of the CuS dip with developing interference fringes during film growth. However, in multilayered CTS/ZnS film it is found that the onset of ZnS deposition can be detected by increased reflection intensity due to reduced surface roughness. Additionally, the shifting onset of the interference fringes to lower photon energies can be used as a characteristic fingerprint during the deposition process. In conclusion, this work showed that Raman spectroscopy, XRD and reflectometry could be successfully implemented for in situ process control and monitoring of high temperature annealing and vacuum deposition of Cu-Sn-Zn-S based precursors and absorbers. The application of these in situ techniques can lead to the optimization of thin film material properties and solar cells. As such, this study has paved the way for further improvement of Cu-Sn-Zn-S based precursors and thin film absorbers. Innerhalb der letzten Jahre hat sich Kesterit Cu2ZnSnS4 (CZTS) aufgrund seiner ungiftigen Bestandteile und deren hoher Verfügbarkeit zu einer interessanten Alternative zu Kupfer Indium Gallium (di-)Selenid (CIGS) entwickelt. Zur Herstellung von Kesterit Dünnschichten wird eine Vielzahl von Methoden verwendet wie Ko-Verdampfung, Sputtern, Elektrodeposition, Spray Pyrolyse und andere. Die meisten davon beinhalten einen Temper-Schritt um die Durchmischung und Interdiffusion der Elemente zu stimulieren. Obwohl der Wirkungsgrad der Kersterit Solarzellen von verschiedenen Forschungsgruppen erhöht wurde, ist der Rekordwert von IBM von 12,6 % noch nicht gebrochen worden. Daher werden experimentelle und theoretische Studien benötigt, die den Einfluss von Fremdphasen und schädlichen Defekten auf die elektronischen Eigenschaften der CZTS Solarzellen vorhersagen. Die vorliegende Arbeit untersucht zerstörungsfreie Methoden für die in situ Prozesskontrolle und -überwachung. Dabei ist das Ziel, entscheidende Prozessschritte wie das Vortempern der Metall-Vorläufer sowie das Hochtemperatur-Tempern und die Vakuum-Abscheidung von Cu-Sn-Zn-S basierten Schichten zu optimieren. Die Untersuchung besteht aus drei Teilen, in denen Raman-Spektroskopie, Röntgendiffraktion (XRD) und Reflektometrie benutzt werden um dieses Ziel zu erreichen. Im ersten Teil wird die Ramanspektroskopie als in situ Methode zur Überwachung des Hochtemperatur-Temperns von Dünnschichten betrachtet. Es wird untersucht, ob das Entstehen von CZTS beim Tempern von gestapelten Mo/CTS/ZnS Dünnschichten beobachtet werden kann. CuS, SnS, ZnS und CTS (Cu-Sn-S) Schichten werden durch physikalische Gasabscheidung hergestellt. Die Intensität der Raman Streuung wurde vergleichen um zu untersuchen, ob die spezifischen Vibrations-Moden bei Raumtemperatur voneinander unterschieden werden können. Dann werden die CTS Schichten zwischen 50 °C und 550 °C getempert um zu untersuchen, ob die CTS Vibrations-Moden bei höheren Temperaturen identifiziert werden können und um festzustellen, welche Übergänge innerhalb der Schicht auftreten. Außerdem wurde eine CZTS Referenzschicht zwischen 50 °C und 550 °C für Referenzzwecke getempert worden. Die Temperaturabhängigkeit der CZTS Haupt-Moden werden betrachtet, um zu untersuche, ob sie für die in situ Temperaturüberwachung verwendet werden können. Abschließend wurde eine ZnS Schicht auf einem nicht getemperten CTS Film abgeschieden, um eine gestapelte Mo/CTS/ZnS Schicht zu erhalten. Diese Schicht wird verwendet, um die Umwandlung von CTS/ZnS zu CZTS bei erhöhten Temperaturen zu untersuchen. Es wurde festgestellt, dass Raman Spektroskopie erfolgreich verwendet werden kann, um die Bildung von CZTS zu überwachen, indem die Haupt-Vibrations-Moden während des Temperns identifiziert werden. Die Intensität der CTS Moden verringert sich bei höheren Temperaturen. Bei 450 °C kann die CZTS Hauptmode bei 338 cm-1 klar identifiziert werden. Der zweite Teil konzentriert sich ebenfalls auf das Hochtemperatur-Tempern. In diesem Teil liegt der Fokus allerdings auf dem Tempern der Metal-Vorläufer-Schichten. Es wird erforscht, ob bestimmte Legierungen die Entstehung von Fremdphasen während der Entstehung der CZTS Absorberschichten begünstigen oder hemmen und welchen Einfluss dies auf die Leistung der Solarzelle hat. In situ XRD wird verwendet, um die Prozesse des Vortemperns zu überwachen. Kupfer arme Metall-Vorläufer-Schichten werden durch Sputtern aufgetragen. Die Vorläufer werden bei 150 °C, 200 °C, 300 °C und 450 °C in einem Drei-Zonen-Röhren-Ofen getempert. Die Auswirkungen auf die strukturellen Eigenschaften werden mit XRD analysiert, um den Entstehungsmechanismus der Legierungen zu untersuchen. Die Vorläuferschichten werden dann in einem Drei-Zonen-Röhren-Ofen sulfurisiert. Die strukturellen Eigenschaften des Absorbers werden analysiert und mit der Struktur der Vorläufer korreliert. Es wurde festgestellt, dass die Entstehung von SnS2 im Absorber proportional zum verbleibenden Sn im vorgetemperten Vorläufer ist. Außerdem zeigen Bilder des Rasterelektronenmikroskops, dass die Temperatur des Vortemperns das Kornwachstum und das Abschieden von Sn-S und Zn-S an der Oberfläche beeinflusst. Bei 450 °C vorgetemperte Absorber weisen keine dieser Phasen an der Oberfläche auf. Solarzellen werden aus diesen Absorber-Schichten hergestellt und die besten Zellen entstanden aus den bei 450 °C vorgetemperten Absorbern. Bei diesen traten Sn und SnS2 weder im Vorläufer noch im Absorber auf. Es konnte geschlussfolgert werden, dass SnS2 Phasen schädlich für den Wirkungsgrad der Zellen sind und dass die Intensität der SnS2 XRD Peaks invers proportional zum Wirkungsgrad der Zellen ist. Der dritte Teil erforscht die Reflektometrie als Methode zur Überwachung des Schichtwachstums während des thermischen Verdampfens in einer Anlage zur physikalischen Gasabscheidung (PVD). Ein Satz aus sechs CZTS Absorbern wird mittels ex situ Raman-Spektroskopie und Reflektometrie vermessen, um den Einfluss der Fremdphasen CuS und ZnS auf die Reflexionsspektren zu untersuchen. Die Zusammensetzung beeinflusst die Reflexionsspektren stark und CuS hinterlässt eine charakteristische Senkung bei 600 nm im Reflexionsspektrum. Eine Integrationsmethode wurde verwendet um dieses Phänomen quantitativ zu analysieren. Anschließend wurde ein Reflektometrieaufbau entworfen, entwickelt und in die PVD-Anlage integriert. Vier verschiedene CZTS koverdampfte und Mehrschicht-Filme wurden abgeschieden. Strukturelle, morphologische und Vibrationseigenschaften werden untersucht. Die Reflexionsspektren werden während des Abscheidens aufgenommen und zeitabhängige Reflexionsspektren werden auf charakteristische Aspekte im Zusammenhang mit Eigenschaften wie Dicke, Bandlücke und Entstehung von Phasen untersucht. CuS konnte in den Schichten mit der Integrations-Methode wegen der Überlagerung der CuS Senkung mit dem entstehenden Interferenzmuster nicht detektiert werden. Allerdings wurde in gestapelten CTS/ZnS Schichten beobachtet werden, dass der Beginn der ZnS Abscheidung durch eine ansteigende Intensität der Reflektion aufgrund der verringerten Oberflächenrauigkeit detektiert werden kann. Zusätzlich kann die Verschiebung des Startpunkts der Interferenzen zu niedrigeren Photonenenergien als charakteristischer Fingerabdruck während des Abscheidungsprozesses verwendet werden. Zusammenfassend zeigt diese Arbeit, dass Raman-Spektroskopie, XRD und Reflektrometrie erfolgreich als in situ Prozesskontrolle und –überwachung bei Hochtemperatur-Tempern und Vakuum-Abscheidung von Cu-Sn-Zn-S basierten Vorläufern und Absorbern realisiert werden konnten. Die Anwendung dieser in situ Techniken kann zu einer Optimierung der Eigenschaften von Dünnschicht-Materialien und von Solarzellen führen. Als solche hat diese Untersuchung den Weg für weitere Verbesserung von Cu-Sn-Zn-S basierte Vorläufer und Dünnschicht-Absorber geebnet.
Book Synopsis Elaboration, Characterization and Design of ZnS Thin Films for Optoelectronic Applications by : Abdelhak Jrad
Download or read book Elaboration, Characterization and Design of ZnS Thin Films for Optoelectronic Applications written by Abdelhak Jrad and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zinc sulfide is one of the first semiconductors discovered. It has great potential application thanks to its physicochemical properties. It is used extensively in optoelectronic, photocatalytic and gas detection applications. In particular, it is used for photovoltaic applications. In this work, the effect of doping by transition metals (manganese, cobalt and copper) on the structural, microstructural, morphological, optical, electrical and magnetic properties of zinc sulfide thin films prepared by chemical bath deposition (CBD) technique are studied by X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy, infrared spectroscopy, scanning electron microscopy, UV-VIS-NIR spectrophotometry, Hall effect and SQUID. The modeling and optimization of higher efficiency Cu(In,Ga)Se2 solar cells are also investigated in this thesis for various layers thickness by using Silvaco ATLAS.
Book Synopsis Growth, Characterization and Applications of Zinc Sulfide Thin Films by Solution-Based Processes by : Dick Chiu
Download or read book Growth, Characterization and Applications of Zinc Sulfide Thin Films by Solution-Based Processes written by Dick Chiu and published by . This book was released on 2017 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zinc Sulfide (ZnS) thin film, with a wide band gap, has been used for many applications, such as buffer layer for CIGS solar cells, light emitting diodes and thin film electroluminescent devices. In this work, ZnS thin films were prepared using two different deposition processes. In the first method, ZnS thin films were deposited by using conventional chemical bath deposition (CBD) process. Micro-reactor assisted solution deposition (MASD) with a flow cell was used as the second method. Growth kinetics of ZnS thin films in CBD was analyzed using in-situ quartz crystal microbalance measurements, and ex-situ transmission electron microscopy (TEM) and scanning electron microscopy (SEM) measurements. The results from the TEM and SEM measurements suggest that the film growth follows a two-step process with the formation of the nuclei in the solution first, attachment to the surface, followed by aggregation of nanoparticles into half spheres on the surface of the substrate and finally half spheres connect to the neighbor half spheres, thereby forming a continuous film. The mechanism study, verified by the SEM images, shows that nucleation starts very early in the CBD process. The degree of supersaturation influences the growth rate and final surface morphology. Temperature-dependent growth rate in the linear growth region follows the Arrhenius equation with an estimated value of activation energy (Ea) to be around 36 KJ/mol. This value, which is considered low (less than 40 kJ/mol), indicates that the rate limiting step is more likely to be a physical process such as adsorption or diffusion, rather than a chemical process, which tends to have higher activation energies. In our study, the chemical bath is vigorously stirred so that the rate-limiting step is likely controlled by a physically adsorption mechanism. The continuous flow micro reactor was used to deposit ZnS thin films using various flow cells of different designs. The depositions were carried out on display glass of 1 inch wide by 3 inches long. Both analytical equations (Hagen-Poiseuille) and computational fluid dynamics were applied to determine proper height for the flow channel. COMSOL Multiphysics simulation of fluid flow along with particle tracer was carried out to find an optimum cut out radius for further study. The film thickness growth kinetics and solute concentration near the substrate surface was simulated using the COMSOL Multiphysics program with an assumption of laminar flow, transport of diluted species and a simplified first order reaction. An insert that mimics a cut out radius of 2.31 inches was fabricated using a 3D printer and installed in the flow cell to deposit ZnS thin films. ZnS thin films deposited using the flow cells with and without the 3D printed insert were investigated. The results were analyzed using plane-view and cross-sectional SEM images. The film thickness was determined by cross-sectional SEM image. The results indicated that the thickness uniformity was improved with the 3D printed insert. We found toward the end of the substrate, the ZnS thin film was not continuous due to the lower solution concentration caused by the depletion of reactants. New flow cell designs were proposed and COMSOL simulation was performed to examine the effectiveness of these flow cells. To demonstrate the utility of the ZnS thin films by solution-based processes, SnS and CuS thin films were deposited on top of the ZnS thin film to form SnS/CuS/ZnS layered precursor film then followed by selenziation at various temperatures in an attempt to produce CZTSSe absorber layers for CZTSSe thin film solar cells.
Book Synopsis Characterization of ZnS Thin Films Grown on the Basal Face of Zn Single Crystals by Reactive Diffusion by : Dave S. Gahunia
Download or read book Characterization of ZnS Thin Films Grown on the Basal Face of Zn Single Crystals by Reactive Diffusion written by Dave S. Gahunia and published by . This book was released on 1991 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural and Optical Properties of ZnS Thin Films by : Hamza Bakr
Download or read book Structural and Optical Properties of ZnS Thin Films written by Hamza Bakr and published by LAP Lambert Academic Publishing. This book was released on 2014-08-08 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The II - VI semiconductors, such as Zinc Sulphide (ZnS) have attracted growing interest owing to their possible application in electro-optic device, it is important semiconductor material for the development of various modern technologies of solid - state devices. Zinc Sulphide have wide direct band gap of about (3.50 -4.1) eV in the UV region; it is used as a key material for blue light emitting diodes and other optoelectronic devices such as cathodluminescent displays, multilayer dielectric filters, electroluminescent displays and multilayer dielectric filters. Zinc Sulpide is highly studied as a window layer in hetrojunction photovoltaic solar cells because the wide band decreases the window absorption loss and improve the short circuit current of the cell. In the area of optics ZnS can be used as reflector, because of it's high visible range. There have been various studies on the bulk and thin film characteristics of ZnS including optical and electrical properties. Zinc sulfide has two types of crystal structures; hexagonal wurtzite and cubic zinc blende, it has a cubic crystal structure in its most stable state.
Book Synopsis Thin Film Solar Cells From Earth Abundant Materials by : Subba Ramaiah Kodigala
Download or read book Thin Film Solar Cells From Earth Abundant Materials written by Subba Ramaiah Kodigala and published by Newnes. This book was released on 2013-11-14 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fundamental concept of the book is to explain how to make thin film solar cells from the abundant solar energy materials by low cost. The proper and optimized growth conditions are very essential while sandwiching thin films to make solar cell otherwise secondary phases play a role to undermine the working function of solar cells. The book illustrates growth and characterization of Cu2ZnSn(S1-xSex)4 thin film absorbers and their solar cells. The fabrication process of absorber layers by either vacuum or non-vacuum process is readily elaborated in the book, which helps for further development of cells. The characterization analyses such as XPS, XRD, SEM, AFM etc., lead to tailor the physical properties of the absorber layers to fit well for the solar cells. The role of secondary phases such as ZnS, Cu2-xS,SnS etc., which are determined by XPS, XRD or Raman, in the absorber layers is promptly discussed. The optical spectroscopy analysis, which finds band gap, optical constants of the films, is mentioned in the book. The electrical properties of the absorbers deal the influence of substrates, growth temperature, impurities, secondary phases etc. The low temperature I-V and C-V measurements of Cu2ZnSn(S1-xSex)4 thin film solar cells are clearly described. The solar cell parameters such as efficiency, fill factor, series resistance, parallel resistance provide handful information to understand the mechanism of physics of thin film solar cells in the book. The band structure, which supports to adjust interface states at the p-n junction of the solar cells is given. On the other hand the role of window layers with the solar cells is discussed. The simulation of theoretical efficiency of Cu2ZnSn(S1-xSex)4 thin film solar cells explains how much efficiency can be experimentally extracted from the cells. - One of the first books exploring how to conduct research on thin film solar cells, including reducing costs - Detailed instructions on conducting research
Book Synopsis Copper Zinc Tin Sulfide Thin Films for Photovoltaics by : Jonathan J. Scragg
Download or read book Copper Zinc Tin Sulfide Thin Films for Photovoltaics written by Jonathan J. Scragg and published by Springer Science & Business Media. This book was released on 2011-09-01 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Jonathan Scragg documents his work on a very promising material suitable for use in solar cells. Copper Zinc Tin Sulfide (CZTS) is a low cost, earth-abundant material suitable for large scale deployment in photovoltaics. Jonathan pioneered and optimized a low cost route to this material involving electroplating of the three metals concerned, followed by rapid thermal processing (RTP) in sulfur vapour. His beautifully detailed RTP studies – combined with techniques such as XRD, EDX and Raman – reveal the complex relationships between composition, processing and photovoltaic performance. This exceptional thesis contributes to the development of clean, sustainable and alternative sources of energy
Book Synopsis Thin Films: Preparation, Characterization, Applications by : Manuel P. Soriaga
Download or read book Thin Films: Preparation, Characterization, Applications written by Manuel P. Soriaga and published by Springer Science & Business Media. This book was released on 2002-09-30 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is about thin films; what they are, how they are prepared, how they are characterized, and what they are used for. The contents of this book not only showcase the diversity of thin films, but also reveals the commonality among the work performed in a variety of areas. The chapters in this volume are based on invited papers presented by prominent researchers in the field at a Symposium on "Thin Films: Preparation, Characterization, Applications" at the 221st National Meeting of the American Chemical Society held in San Diego, California. The coverage of the symposium was extensive; topics ranged from highly-ordered metal adlayers on well-defined electrode surfaces to bio-organic films on non-metallic nanoparticles. An objective of this book is for the readers to be able to draw from the experience and results of others in order to improve and expand the understanding of the science and technology of their own thin films systems.
Book Synopsis Instability Constants of Complex Compounds by : K. B. Yatsimirskii
Download or read book Instability Constants of Complex Compounds written by K. B. Yatsimirskii and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years many research workers have turned their attention to the quantitative characterization of complex compounds and reactions of complex-formation in solution. Instability constants characterize quantitatively the equili bria in solutions of complex compounds and are extensively used by chemists of widely-varying specialities, in analytical chemistry, electrochemistry, the technology of non-ferrous and rare metals, etc., for calculations of various kinds. Despite the wealth of numerical data, no reasonably full coliection of instability constants of complex compounds has been made until now. The various individual collections of data are far from complete and in most cases omit references to the source materials. Moreover, the present state of the chemistry of complex compounds most urgently demands the complete systematization of data on instability constants and an extension of work in this field which would take advantage of the latest physico-chemical methods. The present work contains instability constants for 1,381 complex compounds. We have considered it convenient to preface the summary of the instability constants with an introductory section of a general theoretical character. This section deals with methods for the calculation of instability constants from experimental data, the influence of external conditions, such as temperature and ionic strength, on the stability of com plexes, and the principal factors determining the stability of complex compounds in aqueous solution. (vii) PREFACE In compiling the summary we have used the original litera ture and abstracts for the most part up to 1954, and some work published in 1955-1956.
Book Synopsis Chemical Solution Deposition Of Semiconductor Films by : Gary Hodes
Download or read book Chemical Solution Deposition Of Semiconductor Films written by Gary Hodes and published by CRC Press. This book was released on 2002-10-08 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discussing specific depositions of a wide range of semiconductors and properties of the resulting films, Chemical Solution Deposition of Semiconductor Films examines the processes involved and explains the effect of various process parameters on final film and film deposition outcomes through the use of detailed examples. Supplying experimental res
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.
Book Synopsis Inorganic Ternary Thin Films: Anaysis of Optical Properties by : Cliff Orori Mosiori
Download or read book Inorganic Ternary Thin Films: Anaysis of Optical Properties written by Cliff Orori Mosiori and published by Anchor Academic Publishing (aap_verlag). This book was released on 2015 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thin films can be used to fabricate optoelectronic devices. Technology is currently focusing on ternary thin film composition because of their structure, inter-band transitions and other optical properties that can be maximized. This book discusses in detail the optical characteristics of ternary thin films and further investigates the behavior of Iron Zinc Sulphide, Lead Silver Sulphide, Copper Silver Sulphide, Copper Zinc Sulphide and Cadmium Zinc Sulphide. Thin films are of fundamental importance in modern technology.
Book Synopsis Thin Film Fundamentals by : A. Goswami
Download or read book Thin Film Fundamentals written by A. Goswami and published by New Age International. This book was released on 1996 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: Even Though Thin Solid Films Have Found Tremendous Applications In Electronic, Optical And Other Industries The Basic Concepts About Them Have Often Been Taken Similar To Those Of The Bulk Materials From Which Films Are Prepared And These Need Not Be So. This Book Is Intended To Serve As A Guide To Students, Beginners And Research Workers Interested In This Field.The Basic Science Behind Thin Solid Films Has Been Described With Special Reference To Nucleation, Structures Of Films, Their Growth Process, Phase Transitions, Behaviour Of Films Under Electrical, Electromagnetic And Other Fields With Film Thickness, Temperatures Etc. Characteristic Behaviour Of Films, Different From Bulk, Can Often Be Related To Nearly Two-Dimensional Nature Of Films And Also To The Presence Of Factors Such As Surface States, Contact Potential, High Defect Concentration, Creation Of New Energy Levels, In-Homogeneities, Discontinuities Or Gaps, Etc. Which Are More Often Less Significant In Bulk Materials. Special Techniques Used For Measuring Thin Film Properties And Also Precautions To Be Taken Have Been Given In Details. This Book Also Includes Many Useful Relations Otherwise Scattered In Literatures And Also A Good Number Of References Though Not Complete But Relevant To The Topics Discussed.
Book Synopsis Characterization of Magnetic Thin Films by : Markus M. Schwickert
Download or read book Characterization of Magnetic Thin Films written by Markus M. Schwickert and published by . This book was released on 1999 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thin Film Nanomaterials: Synthesis, Properties and Innovative Energy Applications by : Sampat G. Deshmukh
Download or read book Thin Film Nanomaterials: Synthesis, Properties and Innovative Energy Applications written by Sampat G. Deshmukh and published by Bentham Science Publishers. This book was released on 2024-07-25 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thin Film Nanomaterials: Synthesis, Properties and Innovative Energy Applications provides a comprehensive overview of the synthesis, properties, and cutting-edge applications of thin film nanomaterials. Each chapter explores different aspects of thin film synthesis and its application in energy devices, showcasing different metal-based and carbon nanomaterials . The book begins with a discussion on the synthesis and characterization of cadmium and zinc sulphide thin films for opto-electronics energy devices. Subsequent chapters delve into critical reviews of CIGS thin film nanomaterials, deposition techniques for metal oxide nanocomposite films, and nanostructured TiO2@carbon films for photocatalytic applications. Bandgap engineering, optical properties of composite films, and recent advancements in metal oxide thin films are also covered. Additionally, the synthesis and characteristics of iron oxide films for solar cell and green energy storage applications are discussed. Chapters on challenges and future prospects of CNT-based cathode emitters and advanced characterizations of nanocrystalline ferrimagnetic thin films provide valuable insights into emerging technologies. This book is an essential resource for professors, scientists, engineers, research scholars, postdocs, and undergraduate/graduate students seeking to explore the forefront of nanomaterials and their applications in energy systems.
