Author: Siti Rosmariam Mohd. BokryPublisher:
ISBN:
Category :
Languages : en
Pages : 52
Book Description
Optical Properties of AI-doped ZnO (AZO) Thin Film Prepared by RF Magnetron Sputtering
Author: Siti Rosmariam Mohd. BokryPublisher:
ISBN:
Category :
Languages : en
Pages : 52
Book Description
Studies on the Optical Properties of Al-doped ZnO Thin Film Prepared by Magnetron Sputtering
Author: Khiaril Adzfar YaOptical Properties of Zinc Oxide (ZnO) Thin Film by RF Magnetron Sputtering
Author: Khairul Nadzrin RosliPublisher:
ISBN:
Category :
Languages : en
Pages : 67
Book Description
The Optical and Mechancial Properties of ZnO:F Thin Films Deposited Onto Polyethylene Napthalate and Glass
Author: Stanley R. PotocznyPublisher:
ISBN:
Category : Annealing of glass
Languages : en
Pages : 88
Book Description
Investigates fluorine doped zinc oxide (F doped ZnO) films deposited on both glass and polyethylene napthalate (PEN) substrates by radio frequency (RF) magnetron sputtering and the effect of post growth annealing in different ambients. Analyzes the optical and mechanical properties of these films using atomic force microscopy, transmission and reflectance measurements, and mechanical bend testing.
Structure and Properties of 3d Transition Metal Doped ZnO
Author: Venkaiah MalapatiPublisher: LAP Lambert Academic Publishing
ISBN: 9783659588426
Category :
Languages : en
Pages : 196
Book Description
ZnO based semiconductors as transparent electrodes have given wide range of applications in optoelectronic devices due to their wide band gap replacing the conventional GaN semiconductors. This book is the compilation of the work of Venkaiah Malapati which deals with the synthesis and characterization of an interesting room temperature undoped and 3d transition metal doped ZnO thin films by rf magnetron sputtering. this work addresses the following three major questions... (1) what is the effect of working gas pressure on the properties of undoped and Mn, Fe and Mn-Fe co-doped ZnO thin films. Here, the effect of argon and oxygen gas pressure studied undoped and Mn and Fe doped thin films studied. This book includes a systematic study of structure, morphology, optical, mechanical and magnetic properties of undoped Mn, Fe doped ZnO thin films studied. This book should be useful to readers in enhancing their knowledge about thin film preparation and their characterization.
Effects of As Doping on Properties of ZnO Films
Author: K. S. HuhPublisher:
ISBN:
Category :
Languages : en
Pages : 6
Book Description
A series of ZnO thin films with various deposition temperatures were prepared on (100) GaAs substrates by radio-frequency magnetron sputtering using ZnO target. The ZnO films were studied by field emission scanning electron microscope(FESEM), x-ray diffraction(XRD), photoluminescence(PL) cathodoluminescence(CL), and Hall measurements. The structural, optical, and electrical properties of the films were discussed as a function of the deposition temperature. With increasing temperature, the compressive stress in the films was released and their crystalline and optical properties were improved. From the depth profile of As measured by secondary ion mass spectrometry(SIMS), As doping was confirmed, and, in order to activate As dopant atoms. post-annealing treatment was performed. After annealing treatment, electrical and optical properties of the films were changed.
Deposition of Al-doped ZnO Films by High Power Impulse Magnetron Sputtering
Author: Martin MickanPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Transparent conducting oxides (TCOs) are an important class of materials with many applications such as low emissivity coatings, or transparent electrodes for photovoltaics and flat panel displays. Among the possible TCO materials, Al-doped ZnO (AZO) is studied due to its relatively low cost and abundance of the raw materials. Thin films of AZO are commonly produced using physical vapour deposition techniques such as magnetron sputtering. However, there is a problem with the homogeneity of the films using reactive direct current magnetron sputtering (DCMS). This homogeneity problem can be related to the bombardment of the growing film with negative oxygen ions, that can cause additional acceptor defects and the formation of insulating secondary phases. In this work AZO films are deposited by high power impulse magnetron sputtering (HiPIMS), a technique in which high instantaneous current densities are achieved by short pulses of low duty cycle. In the first part of this thesis, the possibility to improve the homogeneity of the deposited AZO films by using HiPIMS is demonstrated. This improvement can be related to the high instantaneous sputtering rate during the HiPIMS pulses, so the process can take place in the metal mode. This allows for a lower oxygen ion bombardment of the growing film, which can help to avoid the formation of secondary phases. Another problem of AZO is the stability of the properties in humid environments. To assess this problem, the degradation of the electrical properties after an aging procedure was investigated for films deposited by both DCMS and by HiPIMS. A method was proposed, to restore the properties of the films, using a low temperature annealing under N2 atmosphere. The improvement of the electrical properties of the films could be related to a diffusion process, where water is diffusing out of the films. Then, the influence of the substrate temperature on the properties of AZO films deposited by HiPIMS was studied. The electrical, optical and structural properties were found to improve with increasing substrate temperature up to 600° C. This improvement can be mostly explained by the increase in crystalline quality and the annealing of defects. Finally, the deposition of AZO films on flexible PET substrates was investigated. The films are growing as a thick porous layer of preferentially c-axis oriented columns on top of a thin dense seed layer. The evolution of the sheet resistance of the films after bending the films with different radii was studied. There is an increase in the sheet resistance of the films with decreasing bending radius, that is less pronounced for thicker films.
Zinc Oxide Nanostructures
Author: Magnus WillanderPublisher: CRC Press
ISBN: 9814411345
Category : Science
Languages : en
Pages : 225
Book Description
Zinc oxide (ZnO) in its nanostructured form is emerging as a promising material with great potential for the development of many smart electronic devices. This book presents up-to-date information about various synthesis methods to obtain device-quality ZnO nanostructures. It describes both high-temperature (over 100 C) and low-temperature (under
Recent Applications in Sol-Gel Synthesis
Author: Usha ChandraPublisher: BoD – Books on Demand
ISBN: 9535132458
Category : Science
Languages : en
Pages : 312
Book Description
Versatility, extended compositional ranges, better homogeneity, lesser energy consumption, and requirement of nonexpensive equipments have boosted the use of sol-gel process on top of the popularity in the synthesis of nanosystems. The sol-gel technique has not only revolutionized oxide ceramics industry and/or material science but has also extended widely into multidimensional applications. The book Recent Applications in Sol-Gel Synthesis comprises 14 chapters that deal mainly with the application-oriented aspects of the technique. Sol-gel prepared metal oxide (MO) nanostructures like nanospheres, nanorods, nanoflakes, nanotubes, and nanoribbons have been employed in biomedical applications involving drug deliveries, mimicking of natural bone, and antimicrobial activities. The possibility of controlling grain size in aerogel and preparation of ultrahigh-temperature ceramic (UHTC)-based materials, fluorescent glasses, ultraviolet photosensors, and photocatalysts have been discussed in detail by the experts in the field. The usefulness of sol-gel materials as active GRIN, as textile finisher, and as leather modifier with water-repellent and oil-resistive properties would be an incentive for researchers keen to pursue the field.
Author: 林佑璁