Download or read book Investigation of Optical and Electrical Properties of Gallium Zinc Tin Oxide GaZTO Thin Film Transistors by RF Sputter and Its Optoelectronic Application written by 許至淳 and published by . This book was released on 2018 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Europium Doped Wide Band Gap Oxides and an Annealing Study of the Amorphous Oxide Semiconductor Indium Gallium Zinc Oxide written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The electronic, optical and luminescent properties of europium doped wide band gap oxide thin films and the electronic properties of indium gallium zinc oxide (IGZO), a novel amorphous oxide semiconductor were investigated. The thin films of europium doped gallium and gadolinium oxides and indium gallium zinc oxide were deposited on c-axis oriented sapphire substrates by Pulsed Laser Deposition at various conditions of temperature, pressure and doping concentration. Europium doped gallium oxide was found to be in beta phase with monoclinic crystal structure and the films exhibited intense red emission under cathode ray excitation with a peak wavelength of emission at 611 nm which corresponds to the transitions from 5D0 to 7F2 levels in europium. Europium doped gadolinium oxide thin films were found to exhibit two different phases (cubic and monoclinic) with the one of the phases being dominant depending on the growth conditions. The peak wavelength of emission was either 611 nm or 613 nm depending on the phase of the films. The amorphous indium gallium zinc oxide thin films were found to exhibit very high hall mobilities of the order of ̃15 cm2∙V−1∙s−1 and the conductivity could be controlled over several orders of magnitude from 5 x 10−3 S∙cm−1 to 10 S∙cm−1 in the amorphous phase. Annealing the films in presence of air was found to decrease the carrier concentration of the films due the incorporation of oxygen in the films thereby filling up the oxygen vacancies. Applications of amorphous indium gallium zinc oxide include Transparent Thin Film Transistors and use as transparent conducting oxide for optoelectronic devices.
Download or read book Fabrication Process Assessment and Negative Bias Illumination Stress Study of IGZO and ZTO TFTs written by Ken Hoshino and published by . This book was released on 2012 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Indium-gallium-zinc oxide (IGZO) and zinc-tin oxide (ZTO) are investigated for thin-film transistor (TFT) applications. Negative bias illumination stress (NBIS) is employed for electrical stability assessment. Unpassivated IGZO and ZTO TFTs suffer from severe NBIS instabilities. Zinc-tin-silicon oxide is found to be an effective passivation layer for IGZO and ZTO TFTs, significantly improving the NBIS stability. NBIS instabilities in unpassivated TFTs are attributed to an NBIS-induced desorption of chemisorbed oxygen from the channel layer top surface, exposing surface oxygen vacancies. A ZTSO layer protects the channel layer top surface from adsorbed gas interactions and also appears to reduce the density of oxygen vacancies. The best device architectures investigated with respect to TFT electrical performance are found to be staggered with aluminum electrodes for unpassivated TFTs and coplanar with ITO electrodes for ZTSO-passivated TFTs. Annealing in wet-O2 is not found to be effective for improving the performance of IGZO or ZTO TFTs or for reducing the post-deposition annealing temperature.
Download or read book Comprehensive Clinical Plasma Medicine written by Hans-Robert Metelmann and published by Springer. This book was released on 2018-05-04 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the state of the art in clinical plasma medicine and outlines translational research strategies. Written by an international group of authors, it is divided into four parts. Part I is a detailed introduction and includes basic and recent research information on plasma sciences, plasma devices and mechanisms of biological plasma effects. Parts II and III provide valuable clinical insights f.e. into the treatment of superficial contaminations, ulcerations, wounds, treatment of cells in cancer, special indications like in heart surgery, dentistry, palliative treatment in head and neck cancer or the use of plasma in hygiene. Part IV offers information on how and where to qualify in plasma medicine and which companies produce and supply medical devices and is thus of particular interest to medical practitioners. This comprehensive book offers a sciences based practical to the clinical use of plasma and includes an extended selection of scientific medical data and translational literature.
