Al Doped Zinc Oxide As A Transparent Conductive Material
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Al Doped Zinc Oxide As A Transparent Conductive Material
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Author : R. A. Linklater
language : en
Publisher:
Release Date : 2011
Al Doped Zinc Oxide As A Transparent Conductive Material written by R. A. Linklater and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Zinc oxide categories.
Characterization Of Aluminum Doped Zinc Oxide Thin Films For Photovoltaic Applications
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Author : Bojanna P. Shantheyanda
language : en
Publisher:
Release Date : 2010
Characterization Of Aluminum Doped Zinc Oxide Thin Films For Photovoltaic Applications written by Bojanna P. Shantheyanda and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Aluminum categories.
Growing demand for clean source of energy in the recent years has increased the manufacture of solar cells for converting sun energy directly into electricity. Research has been carried out around the world to make a cheaper and more efficient solar cell technology by employing new architectural designs and developing new materials to serve as light absorbers and charge carriers. Aluminum doped Zinc Oxide thin film, a Transparent conductive Oxides (TCO) is used as a window material in the solar cell these days. Its increased stability in the reduced ambient, less expensive and more abundance make it popular among the other TCO's. It is the aim of this work to obtain a significantly low resistive ZnO:Al thin film with good transparency. Detailed electrical and materials studies is carried out on the film in order to expand knowledge and understanding. RF magnetron sputtering has been carried out at various substrate temperatures using argon, oxygen and hydrogen gases with various ratios to deposit this polycrystalline films on thermally grown SiO2 and glass wafer. The composition of the films has been determined by X-ray Photoelectron Spectroscopy and the identification of phases present have been made using X-ray diffraction experiment. Surface imaging of the film and roughness calculations are carried out using Scanning Electron Microscopy and Atomic Force Microscopy respectively. Determination of resistivity using 4-Probe technique and transparency using UV spectrophotometer were carried out as a part of electrical and optical characterization on the obtained thin film. The deposited thin films were later annealed in vacuum at various high temperatures and the change in material and electrical properties were analyzed.
Transparent Conductive Zinc Oxide
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Author : Klaus Ellmer
language : en
Publisher: Springer Science & Business Media
Release Date : 2007-12-29
Transparent Conductive Zinc Oxide written by Klaus Ellmer and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-12-29 with Science categories.
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.
Silicon Heterojunction Solar Cells
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Author : W.R. Fahrner
language : en
Publisher: Trans Tech Publications Ltd
Release Date : 2006-08-15
Silicon Heterojunction Solar Cells written by W.R. Fahrner and has been published by Trans Tech Publications Ltd this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-08-15 with Technology & Engineering categories.
The world of today must face up to two contradictory energy problems: on the one hand, there is the sharply growing consumer demand in countries such as China and India. On the other hand, natural resources are dwindling. Moreover, many of those countries which still possess substantial gas and oil supplies are politically unstable. As a result, renewable natural energy sources have received great attention. Among these, solar-cell technology is one of the most promising candidates. However, there still remains the problem of the manufacturing costs of such cells. Many attempts have been made to reduce the production costs of conventional solar cells (manufactured from monocrystalline silicon using diffusion methods) by instead using cheaper grades of silicon, and simpler pn-junction fabrication. That is the hero of this book; the heterojunction solar cell.
Transparent And Conductive Aluminum Doped Zinc Oxide Semiconductor For Opto Electronic Applications
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Author : Oluwakayode Bamiduro
language : en
Publisher:
Release Date : 2008
Transparent And Conductive Aluminum Doped Zinc Oxide Semiconductor For Opto Electronic Applications written by Oluwakayode Bamiduro and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Optoelectronics categories.
High Quality Zno
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Author :
language : en
Publisher:
Release Date : 2009
High Quality Zno written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
Aluminum-doped zinc oxide, ZnO:Al or AZO, is a well-known n-type transparent conducting oxide with great potential in a number of applications currently dominated by indium tin oxide (ITO). In this study, the optical and electrical properties of AZO thin films deposited on glass and silicon by pulsed filtered cathodic arc deposition are systematically studied. In contrast to magnetron sputtering, this technique does not produce energetic negative ions, and therefore ion damage can be minimized. The quality of the AZO films strongly depends on the growth temperature while only marginal improvements are obtained with post-deposition annealing. The best films, grown at a temperature of about 200?C, have resistivities in the low to mid 10-4 Omega cm range with a transmittance better than 85percent in the visible part of the spectrum. It is remarkable that relatively good films of small thickness (60 nm) can be fabricated using this method.
Electronic Structure Of Al Doped Zno Transparent Conductive Thin Films Studied By X Ray Absorption And Emission Spectroscopies
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Author : 邱昭文 (物理學)
language : en
Publisher:
Release Date : 2012
Electronic Structure Of Al Doped Zno Transparent Conductive Thin Films Studied By X Ray Absorption And Emission Spectroscopies written by 邱昭文 (物理學) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Transparent Conductive Zinc Oxide
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Author : Klaus Ellmer
language : en
Publisher: Springer
Release Date : 2009-09-02
Transparent Conductive Zinc Oxide written by Klaus Ellmer and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-09-02 with Technology & Engineering categories.
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.
Development Of Zno Fto Nanocomposites For The Use In Transparent Conductive Thin Films
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Author : Christelle Habis
language : en
Publisher:
Release Date : 2022
Development Of Zno Fto Nanocomposites For The Use In Transparent Conductive Thin Films written by Christelle Habis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with categories.
My thesis work entitled “Development of ZnO-FTO nanocomposites for the use in transparent conductive thin films” is supervised by Professor Michel Aillerie at University of Lorraine. This work was mainly made at the “Laboratoire des Matériaux Optiques, Photoniques et Systèmes” LMOPS in Centrale Supélec, Metz. Although this work forms a whole in the elaboration of transparent conductive oxides, it is divided into two parts. The first part consists on identifying the properties of bulk materials (ZnO and FTO) deposited in the form of thin film. Whereas, the second part is about the elaboration and characterization of Zinc Oxide (ZnO) and Aluminum doped Zinc Oxide (AZO) nanofibers, then associated to FTO thin films to form nanocomposite. The main objective of this work is to make flexible electrodes using low cost and abundant material, but also improving the optical properties and more specifically the haze factor of the nanocomposite layers.Transparent conductive oxides (TCOs) are technologically significant class of materials extensively used in thin film solar cells due to their ability to transmit light and collect charge carriers. In addition to the fundamental qualities of transparency and conductivity, the TCOs are frequently desired to have a certain degree of surface roughness (i.e., texture) in order to effectively scatter transmitted light into the active materials, therefore lengthen the optical path and, as a result, enhance the performance of the cell and light absorption. This thesis focuses on the development of low-cost fabrication techniques for transparent oxide layers using non-polluting materials to enable the functionalization of operational devices with high efficiency for renewable energy production. The choice was made to study tin-based TCO layers doped with fluorine, F:SnO2, known as FTOs for "Fluor Tin Oxides". FTOs are wide band gap oxides, like ZnO, TiO2, Al2O3, pure or doped. In principle, these layers have a high scattering factor, as defined above, in order to improve the optical path and absorption. In addition, the optical texture of TCOs can be easily controlled by depositing suspensions of nanostructures before the film deposition. Generally, these nanostructures are nanoparticles or even carbon nanowires or metallic nanowires (silver, copper, ...) and more recently nanowires of TiO2 (presenting the disadvantage of the titanium element) or of undoped ZnO which unfortunately decrease the conductivity due to the increase of the interface resistance with the concentration of the nanoparticles.Therefore, we propose the study of FTO thin films, pure and also in the presence of ZnO and AZO nanofibers by electrospinning from a PVA-based solution in order to have a nanostructured layer with improved transparency and electrical conductivity properties to be integrated as transparent electrodes in photovoltaic cells, meeting the performance criteria defined above. With the characterization techniques available in the LMOPS laboratory and the University of Lorraine (SEM, Raman, EDX, DRX, UV-vis Spectro, ATG, AFM, profilometer) the growth will be followed by morphological and structural studies of the layers. Finally, electrical and optical properties, in particular absorption and scattering factor, will also be extensively investigated on selected layers with the best structural and morphological properties and the minimum of interface defects when deposited on a PV structure.
Optimization Of The Process For Sol Gel Derived Zno
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Author : Matthew Nagorski
language : en
Publisher:
Release Date : 2021
Optimization Of The Process For Sol Gel Derived Zno written by Matthew Nagorski and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with categories.
Transparent and conducting Al-doped ZnO thin films with c-axis-preferred orientation were prepared on glass substrate via sol-gel route. The physical, optical and electrical properties were investigated to determine an optimal withdrawal speed, aluminum source and treatment in order to obtain a smooth, dense, highly crystalline, conductive and transparent thin film with a high figure of merit for transparent conducting oxide applications. An optimal withdrawal speed was found to be 2.5 cm/min. Optimal aluminum source and concentration was found to be 0.5 at.% using aluminum chloride hexahydrate. An additional treatment in an N2 environment was found to be the best method to improve the electrical properties of the films while maintaining high crystallinity and transparency.
