Download or read book Physical and Electrical Characterization of Hafnium Oxide Thin Films Deposited by Pulsed Laser Deposition Technique written by Bhanu P. Dharmaiahgari and published by . This book was released on 2004 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electrical Characterization of Hafnium Oxide HfO2 Thin Films Deposited by RF Sputtering written by Pratap Murali and published by . This book was released on 2006 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hafnium Oxide And Hafnium Silicate For High k Application written by Harish Bhandari and published by . This book was released on 2010-04 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Characterization of Hafnium Oxide Films Formed Via Chemical and Physical Vapor Deposition written by Alvaro Padilla and published by . This book was released on 2007 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Transparent Oxide Electronics written by Pedro Barquinha and published by John Wiley & Sons. This book was released on 2012-03-15 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transparent electronics is emerging as one of the most promising technologies for the next generation of electronic products, away from the traditional silicon technology. It is essential for touch display panels, solar cells, LEDs and antistatic coatings. The book describes the concept of transparent electronics, passive and active oxide semiconductors, multicomponent dielectrics and their importance for a new era of novel electronic materials and products. This is followed by a short history of transistors, and how oxides have revolutionized this field. It concludes with a glance at low-cost, disposable and lightweight devices for the next generation of ergonomic and functional discrete devices. Chapters cover: Properties and applications of n-type oxide semiconductors P-type conductors and semiconductors, including copper oxide and tin monoxide Low-temperature processed dielectrics n and p-type thin film transistors (TFTs) – structure, physics and brief history Paper electronics – Paper transistors, paper memories and paper batteries Applications of oxide TFTs – transparent circuits, active matrices for displays and biosensors Written by a team of renowned world experts, Transparent Oxide Electronics: From Materials to Devices gives an overview of the world of transparent electronics, and showcases groundbreaking work on paper transistors

Download or read book Comparative Characterization of Molybdenum Oxide Thin Films Grown on Various Substrates Using Temporally Different Pulsed Laser Deposition Techniques written by Krishna Harsha Puppala and published by . This book was released on 2016 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pulsed Laser Deposition (PLD) technique, with its vast tunability in terms of thin film fabrication has been the center of this study. By changing the temporal component of the laser source used for deposition into the femtosecond (fs) regime, interesting structural, morphological changes can be achieved which may prove to be beneficial for photocatalytic applications. In particular, molybdenum oxide thin films, which are the less well-studied and potentially newer candidates for photocatalysis applications have been chosen for investigation. Hence, a detailed characterization study of molybdenum oxide thin films synthesized using femtosecond-based (f-PLD) and nanosecond-based (n-PLD) techniques, was carried out in terms of their structural, morphological, surface chemical/ electronic states and vibrational properties using X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy and Raman spectroscopy. The f-PLD technique was found to produce more favorable molybdenum oxide thin films deposited on glass for surface-related applications, in terms of having a higher surface to volume ratio, than the n-PLD technique. A related simultaneous study of substrate-based effect on the thin films produced using n-PLD system, also revealed both variation among the morphological, structural, and electronic (in terms of Mo oxidation state) properties depending upon the nature of the substrate used to synthesize the molybdenum oxide thin films. Special cases of thin films on epitaxial substrates (Si, sapphire) have been characterized to determine the parameters necessary for fabricating highly-textured thin films with large surface-area to volume ratio, which is key to efficient photo-catalysts.

Download or read book Development and Characterization of Pulsed Laser Deposited Tungsten Oxide Thin Films for Electrochromic Applications written by Syed Ali Shamoel Zaidi and published by . This book was released on 2013 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to fabricate layered electrochromic devices capable of reversibly changing color in response to applied voltage, pulsed laser deposition was used to deposit thin films of tungsten oxide on fluorine doped tin oxide substrates.The thin films were deposited at room temperature in an O2 atmosphere of the order of 10−1 mbar on FTO/glass substrates using a KrF pulsed laser source. XRD analysis confirmed the resulting films to be amorphous and UV-Vis spectroscopy confirmed transparency. Raman shift confirms non-crystalline WO3 presence. Electrochromic devices were connected to a cyclic voltammetry system to regulate voltage sweeps, investigate charge transport, response time and reversibility of color/bleached states. Scanning electron microscopy was performed on the films post device operation to examine the surface topography and composition. Raman spectroscopy and XRD was performed post device films to investigate any changes in the films. Li+ ion conducting glasses of composition xLi2SO4 - (1-x)[0.50Li2O-0.5(2NH4H2PO2)) were characterized using resistivity measurements and neutron diffraction experiments to evaluate them as suitable substitutes for the electrolyte in the electrochromic devices. Formation of crystallites above 400°C has been observed which is understood to hamper Li+ ion mobility, resulting in reduced performance of the electrolyte. The acid based electrochromic devices have exhibited superior reversibility.

Download or read book Formation and Characterization of Ferroelectric Thin films Deposited by Pulsed laser Ablation written by Christopher Scarfone and published by . This book was released on 1991 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Functional Metal Oxide Thin Films Grown by Pulsed Laser Deposition written by Mihaela Filipescu and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this work is to show that material processing by laser-based technologies can lead to the growth of multifunctional thin films with potential in a large area of applications. The synthesis of Hf, Ta, Si, and Al metal oxides described here relies on the use of pulsed laser deposition (PLD), or radiofrequency (RF) assisted PLD. The morphology and structure of the as-grown thin films are investigated by atomic force microscopy, X-ray diffraction, and transmission electron microscopy, whilst the optical properties are determined by spectroellipsometry. The dielectric behaviour of the deposited layers is investigated by electrical measurements.

Download or read book Bismuth Oxide Thin Films for Optoelectronic and Humidity Sensing Applications written by Simona Condurache-Bota and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Bismuth oxide thin films still prove attractive to both scientists and engineers due to their semiconducting behavior, large energy bandgap and high refractive index, despite their often complex structure, both polymorphic and polycrystalline. We present here a summary and a comparison of the morpho-structural and optical properties of such films prepared through three physical vapor deposition (PVD) techniques on several types of substrates kept at different temperatures. Thermal vapor deposition, thermal oxidation in air and pulsed laser deposition are discussed as largely used PVD methods. It is proved that the physical properties of the bismuth oxide thin films can be tailored by changing the substrate nature and its temperature during the deposition process in a way even more relevant than even the chosen deposition method. Thus, bismuth oxide thin films with energy bandgaps ranging from the infrared up to near-ultraviolet can be obtained, depending on their structure and morphology. High refractive index of the films can be also attained for specific spectral ranges. When deposited on certain conductive substrates, the films have much lower electrical resistance and even became sensitive to water vapor. Therefore, humidity sensing and optoelectronic applications of the analyzed bismuth oxide thin films can be easily found and used in both science and technology.

Download or read book Microstructure and Electrical Performance of Sputter deposited Hafnium Oxide HfO2 Thin Films written by Brandon A. Aguirre and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pulsed Laser Deposition Assisted Synthesis and Characterization of Titanium Dioxide Thin Films written by Jermaine Maurice Bradley and published by . This book was released on 2005 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Investigates the structural and mechanical properties of pulsed laser deposited (PLD) titania (TiO2) thin films. Uses nano-indentation to determine the mechanical properties of the films as a function of the growth parameters.

Download or read book Ferroelectricity in Doped Hafnium Oxide written by Uwe Schroeder and published by Woodhead Publishing. This book was released on 2019-03-27 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ferroelectricity in Doped Hafnium Oxide: Materials, Properties and Devices covers all aspects relating to the structural and electrical properties of HfO2 and its implementation into semiconductor devices, including a comparison to standard ferroelectric materials. The ferroelectric and field-induced ferroelectric properties of HfO2-based films are considered promising for various applications, including non-volatile memories, negative capacitance field-effect-transistors, energy storage, harvesting, and solid-state cooling. Fundamentals of ferroelectric and piezoelectric properties, HfO2 processes, and the impact of dopants on ferroelectric properties are also extensively discussed in the book, along with phase transition, switching kinetics, epitaxial growth, thickness scaling, and more. Additional chapters consider the modeling of ferroelectric phase transformation, structural characterization, and the differences and similarities between HFO2 and standard ferroelectric materials. Finally, HfO2 based devices are summarized. Explores all aspects of the structural and electrical properties of HfO2, including processes, modelling and implementation into semiconductor devices Considers potential applications including FeCaps, FeFETs, NCFETs, FTJs and more Provides comparison of an emerging ferroelectric material to conventional ferroelectric materials with insights to the problems of downscaling that conventional ferroelectrics face

Download or read book Plasma Enhanced Chemical Vapor Deposition and Physical Characterization of Tin Oxide Thin Films written by Joshua Robbins and published by . This book was released on 2000 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pulsed Laser Deposition of Thin Films written by Robert Eason and published by John Wiley & Sons. This book was released on 2007-12-14 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt: Edited by major contributors to the field, this text summarizes current or newly emerging pulsed laser deposition application areas. It spans the field of optical devices, electronic materials, sensors and actuators, biomaterials, and organic polymers. Every scientist, technologist and development engineer who has a need to grow and pattern, to apply and use thin film materials will regard this book as a must-have resource.

Download or read book Functional Oxide Thin Films for Micromechanical and Bioelectronic Devices written by Maximilian Becker and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present cumulative thesis discusses the challenging and exciting way to utilize the outstanding physical properties of functional oxide materials for the development of new applications and devices, with a focus on the integration of lead-free ferroelectric thin films into bioelectronics. The cumulative thesis comprises four publications - Publication I - IV - and is organized as follows. The first part (Publication I + II) is devoted to the pulsed laser deposition (PLD) of lead-free 0.5(Ba0:7Ca0:3)TiO3-0.5Ba(Zr0:2Ti0:8)O3 (BCZT) ferroelectric thin films on different substrates and their detailed electrical characterization and analysis by impedance spectroscopy. For the deconvolution of measured impedance spectra by equivalent-circuit fitting, a new equivalentcircuit element based on the theory of interface pinning in random systems - the domain wall pinning element - is introduced which models the impedance of a ferroelectric including the contribution from domain-wall-motion in the subswitching regime. This approach is applied to impedance spectra collected on polycrystalline and epitaxial BCZT thin film capacitor stacks, and the domain-wall-motion induced field- and frequency-dependent dielectric response of the BCZT films is extracted by domain wall pinning element modeling and equivalent-circuit fitting. Moreover, an extended Rayleigh analysis is presented which allows one to quantify the coupling strength between dielectric nonlinearity and frequency dispersion and the identification of different domain-wall-motion regimes in the BCZT films. The corresponding domain-wall dynamics in the BCZT thin films is discussed in detail and a schematic diagram of the different domain-wall-motion regimes is presented. The results from the extended Rayleigh analysis - obtained on epitaxial and polycrystalline BCZT films - indicate, that the presence of grain boundaries in BCZT reduces the coupling strength between dielectric nonlinearity and frequency dispersion and suppresses the motion of internal domain-wall segments in addition to the suppression of the irreversible center-of-mass motion of the domain walls. In the second part (Publication III), microelectrodes based on conductive sputtered IrO2 films (SIROFs) - which are utilized to provide electro-neural interfaces for subretinal stimulation in the state-of-the-art retinal prosthesis “Retina Implant Alpha AMS” - are analyzed in detail by electrochemical impedance spectroscopy (EIS) and subsequent equivalent-circuit analysis. The supercapacitive behavior of the investigated SIROF-microelectrodes is modeled by a pseudocapacitance Cp in parallel to the capacitance of the electrochemical double layer CDL, and both capacitances are represented by a constant phase element (CPE) in the equivalent-circuit model. By fitting the measured EIS data with the equivalent-circuit model, Cp and CDL are quantified from the obtained CPE fit parameters, and the resulting supercapacitive behavior is in agreement with cyclic voltammetry measurements. The results indicate, that the pseudocapacitance Cp due to quasi-continuous reversible reduction and oxidation between Ir3+/ Ir4+ valence states is the dominant contribution to the supercapacitance and to the charge injection capacity (CIC) of the investigated SIROF-microelectrodes. Finally, in the third part (Publication IV), a new approach for bioelectronic interfacing of electrogenic cells or tissue is introduced, which utilizes a conductive microelectrode coated with an insulating ferroelectric layer for extracellular electrical stimulation. It is shown, that the ferroelectric polarization current contributes to the extracellular stimulation current provided by the ferroelectric microelectrode. The switching regime of a ferroelectric microelectrode in an electrolyte-ferroelectric-conductor configuration is analyzed based on the traditional Kolmogorov-Avrami-Ishibashi (KAI)-model and the time-dependent stimulation current in response to an applied voltage step is simulated for a generic microelectrode geometry. It is shown that, depending on the remanent polarization Pr of the utilized ferroelectric, the polarization current in the switching regime can increase the CIC by up to two orders of magnitude as compared to the commonly used extracellular capacitive stimulation with microelectrodes coated with an insulating dielectric layer. The results pave the way for extracellular electrical stimulation with small microelectrodes (30 um in diameter) without toxic electrochemical effects, which is crucial for implantable neuroprosthetic devices such as high-resolution retinal-implants or brain-machine interfaces.

Download or read book Pulsed Excimer Laser Deposition of Ferroelectric Thin Films written by S. B. Krupanidhi and published by . This book was released on 1991 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pulsed UV excimer laser ablation was employed to deposit multi-axial, bi-axial and uni-axial ferroelectric compositions of PZT, bismuth titanate and lead germanate respectively. In general, a fluence lower than 2 J/cm2 caused a preferential evaporation of volatile components, resulting in stoichiometric imbalance. However, the fluences beyond 2 J/cm2 enabled the deposition of stoichiometric thin films of multi-component oxide systems. The intrinsic bombardment due to the energetic ablated species during the thin film deposition seemed to influence the composition, structure, orientation and the electrical properties. The electrical characterization of ferroelectric films indicated a dielectric constant of 800-1000, a P, of 32 micron C/cm2 and E sub c of 130KV/cm for polycrystalline PZT films and the corresponding quantities were measured to be 150, 7 micron C/cm2 and 20 KV/cm for in-situ crystallized c-axis preferred oriented bismuth titanate films. Lead germanate thin films oriented along c-axis (OO3) showed a dielectric constant of 30, a P sub r of 2.5 micron C/cm2 and E sub c of 55 KV/cm.