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Download or read book High Performance FeSe0.5Te0.5 Thin Films Grown at Low Temperature by Pulsed Laser Deposition written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mike Abrecht
Publisher :
ISBN 13 :
Total Pages : 84 pages
Book Rating : 4.:/5 (852 download)
Download or read book Photoemission Studies of Thin Films Grown by Pulsed Laser Deposition written by Mike Abrecht and published by . This book was released on 2003 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Yilu Li
Publisher :
ISBN 13 :
Total Pages : 97 pages
Book Rating : 4.:/5 (97 download)
Download or read book Growth of Semiconductor Thin Films by Pulsed Laser Deposition written by Yilu Li and published by . This book was released on 2016 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pulsed ultraviolet light from a XeF excimer laser was used to grow thin films of zinc oxide and tin dioxide on (111) p-type silicon wafers within a versatile high vacuum laser deposition system. This pulsed laser deposition system was self-designed and self-built. Parameters such as pressure, target temperature, and distance from the target to the substrate can be adjusted in the system. Scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction spectroscopy, Raman spectroscopy and ellipsometry were used to analyze the structures and properties of ZnO and SnO2 thin films. The critical temperature required to fabricate a crystalline ZnO thin film by pulsed laser deposition was found and has been confirmed. For the SnO2 thin film, the critical temperature required to generate a crystalline structure could not be found because of the temperature limit of the substrate heater used in the experiment. In SnO2 thin films, thermal annealing has been used to convert into crystalline structure with (110), (101) and (211) orientations. After fabricating the amorphous SnO2 thin films, they were put into an oven with specific temperatures to anneal them. The minimum annealing temperature range was found for converting the amorphous SnO2 thin films into SnO2 thin films with a crystalline structure. Thermal annealing has also been applied to some amorphous ZnO thin films which were fabricated under the critical temperature required to produce crystalline ZnO thin films. The minimum annealing temperature range for amorphous ZnO thin films was found and only one orientation (002) shown after annealing. Laser annealing technology has also been applied for converting both amorphous ZnO and SnO2 thin films, and results show that this method was not well suited for this attempt. ZnO thin films and SnO2 thin films with a crystalline structure have inportant widely used in industry, for example, application in devices such as solar cells and UV or blue-light-emitting devices. The aim of this research is to help improving the manufacturing process of ZnO and SnO2 thin films.
Author : P. Joshi
Publisher : The Electrochemical Society
ISBN 13 : 1566777259
Total Pages : 63 pages
Book Rating : 4.5/5 (667 download)
Download or read book Low Temperature Processing of Thin Films for Flexible Electronics written by P. Joshi and published by The Electrochemical Society. This book was released on 2009-05 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers included in this issue of ECS Transactions were originally presented in the symposium ¿Novel Plasma Techniques for Low Temperature Processing of Thin Films for Flexible Electronics¿, held during the 215th meeting of The Electrochemical Society, in San Francisco, California from May 24 to 29, 2009.
Author : Wenbiao Jiang
Publisher :
ISBN 13 :
Total Pages : 296 pages
Book Rating : 4.:/5 (375 download)
Download or read book Synthesis and Computer Simulation of Thin Films Grown by Pulsed Laser Deposition written by Wenbiao Jiang and published by . This book was released on 1996 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mohammed Habibullah Khan
Publisher :
ISBN 13 :
Total Pages : 298 pages
Book Rating : 4.:/5 (18 download)
Download or read book Study on SiGe Thin Films Grown by Pulsed Laser Deposition written by Mohammed Habibullah Khan and published by . This book was released on 2006 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Grows silicon germanium (SiGe) polycrystalline thin films by the pulsed laser deposition (PLD) method and studies the thin films for different temperature, background pressure, laser fluence, distance between substrate and target, and off axis substrate position. Studies the effect of operating parameters on growth rate and film quality to optimize growth parameters. Considers the non-stoichiometric transfer of SiGe, uniformity issues, particulate issues, and resistivities with respect to the operating variables of PLD.
Author : Syed Farid Uddin Farhad
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (16 download)
Download or read book Copper Oxide Thin Films Grown by Pulsed Laser Deposition for Photovoltaic Applications written by Syed Farid Uddin Farhad and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Farhad Syed
Publisher :
ISBN 13 :
Total Pages : 222 pages
Book Rating : 4.:/5 (976 download)
Download or read book Copper Oxide Thin Films Grown by Pulsed Laser Deposition for Photovoltaic Applications written by Farhad Syed and published by . This book was released on 2016 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kenneth Scott
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (62 download)
Download or read book The Pulsed Laser Deposition of High Temperature Superconducting Thin Films written by Kenneth Scott and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download Pulsed Laser Deposition of Bi[sub]2[/sub]Te[sub]3[/sub] Based Thermoelectric Thin Films PDF Online Free](https://books.google.com/books/content/images/frontcover/fmiWAQAACAAJ?fife=w200-h370)
Download or read book Pulsed Laser Deposition of Bi[sub]2[/sub]Te[sub]3[/sub] Based Thermoelectric Thin Films written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Thin film thermoelectric coolers offer several advantages that include reliability and integration with device processing. Successful thin film thermoelectric cooling requires integration with thin film diamond or aluminum nitride heat spreaders and the device wafers. Numerous deposition techniques have been attempted previously including evaporation, flash evaporation, molecular beam epitaxy, chemical vapor deposition, and sputtering. In the case of thermoelectric thin films, a primary difficulty is maintaining stoichiometry. In the present effort, thin films of p-type Bi[subscript 0.5]Sb[subscript 1.5]Te3, n-type Bi2Te[subscript 2.7]Se[subscript 0.3] and n-type (Bi2]Te3)90(Sb2Te3)5(Sb2Se3)5 (with 0.13 wt.% SbI3) were deposited on mica and aluminum nitride substrates using Nd-YAG pulsed laser deposition. The film quality in terms of composition and crystal perfection was studied as a function of growth temperature. The films were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) for crystalline quality, and by scanning electron microscopy (SEM) for surface morphology. The films showed uniform thickness and high crystalline quality with a preferred (0 0 n) alignment with the substrates. The Seebeck coefficient, electrical resistivity and Hall mobility were measured and compared with the bulk properties. An improvement in the thermoelectric properties by reduction in laser induced particulates has been demonstrated by the use of lower incident laser energy. The thermoelectric characteristics of the films deposited on AlND Si substrates were found to be superior to those deposited on mica substrates. X-ray mapping and energy-dispersive-spectroscopy were performed to determine the composition and homogeneity of the thin films. The results showed that pulsed laser deposition has the ability to produce congruent transfer of the target composition to the thin.
Author : Çağla Özgit-Akgün
Publisher : LAP Lambert Academic Publishing
ISBN 13 : 9783659208232
Total Pages : 180 pages
Book Rating : 4.2/5 (82 download)
Download or read book Plasma-Assisted Atomic Layer Deposition of III-Nitride Thin Films written by Çağla Özgit-Akgün and published by LAP Lambert Academic Publishing. This book was released on 2014-03 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: III-nitride compound semiconductors (AlN, GaN, InN) and their alloys have emerged as versatile and high-performance materials for a wide range of electronic and optoelectronic device applications. Although high quality III-nitride thin films can be grown at high temperatures (>1000 C) with significant rates, deposition of these films on temperature-sensitive device layers and substrates necessitates the adaptation of low-temperature methods such as atomic layer deposition (ALD). When compared to other low-temperature thin film deposition techniques, ALD stands out with its self-limiting growth mechanism, which enables the deposition of highly uniform and conformal thin films with sub-angstrom thickness control. These unique characteristics make ALD a powerful method especially for depositing films on nanostructured templates, as well as preparing alloy thin films with well-defined compositions. This monograph reports on the development of low-temperature ( 200 C) plasma-assisted ALD processes for III-nitrides, and presents detailed characterization results for the deposited thin films and fabricated nanostructures."
Download or read book An Investigation Into Controlling the Growth Modes of Ferroelectric Thin Films Using Pulsed Laser Deposition and RHEED. written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Thin film ferroelectricss are widely considered for tunable microwave applications, the reduced small dimensions leading to low tuning voltages. The incipient ferroelectric strontium titanate is an ideal solution for tunable microwave devices, particularly in conjunction with high temperature superconductors. It has no spontaneous polarisation yet possesses a large permittivity at low temperatures that is sensitive to an electric field bias with relatively low loss. For such applications it is essential to use a low loss substrate such as magnesium oxide. In general, thin films have less favourable dielectric properties compared with their bulk counterparts due to differences in microstructure. strontium titanate films on MgO substrate prove difficult to grow due to the high lattice mismatch and issues connected with chemical incompatibility at the film/substrate interface. It has been shown here that it is possible to engineer the growth mode of this system, altering the strain and the defect concentration. These are both known factors influencing the dielectric properties of thin films. Reflection high energy electron diffraction (RHEED) in combination with interval pulsed laser deposition (PLD) has been used to achieve a two dimensional, layer-by-layer growth mode. Crucial to this was the deposition of a unit-cell thick titanium dioxide buffer layer on the surface, the deposition of which was also controlled by RHEED. The growth mode and microstructure of films grown using standard PLD with and without the buffer layer and films grown by interval PLD with and without the buffer layer have been compared by analysis of the RHEED data and transmission electron microscopy. This is the first time layer-by-layer growth has been achieved in this highly-mismatched epitaxial systems. The results point the way towards control of defects in oxide thin films from which microstructure-property relationships may be more clearly determined.
Author : Mihaela Filipescu
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (115 download)
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.
Author : XAVIER.. DIAZ
Publisher :
ISBN 13 :
Total Pages : 152 pages
Book Rating : 4.:/5 (49 download)
Download or read book ETUDE DES COUCHES MINCES DE CARBONE PREPAREES PAR LA TECHNIQUE DE DEPOSITION PAR LASER PULSE written by XAVIER.. DIAZ and published by . This book was released on 1995 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: LE BUT DE CETTE THESE EST L'ETUDE DES PARAMETRES PHYSIQUES QUI FONT VARIER LES PROPRIETES ELECTRONIQUES ET MECANIQUES DES COUCHES MINCES DE CARBONE AMORPHE (A-C) EVAPOREES PAR LA TECHNIQUE DE DEPOSITION PAR LASER PULSE (PLD). TOUT D'ABORD, ON A FAIT DES EXPERIENCES POUR CONNAITRE LE SYSTEME EXPERIMENTAL: ON A ETUDIE LA COMPOSITION DU MATERIAU EVAPORE ET LA CINETIQUE DE DEPOSITION DES PARTICULES SUR LA SURFACE DE SI (111) 7X7. CETTE DERNIERE A ETE OBSERVE A L'ECHELLE ATOMIQUE AVEC UN MICROSCOPE A EFFET TUNNEL DANS L'ULTRA VIDE. DANS UNE DEUXIEME PARTIE, ON A CARACTERISE LES DEPOTS DE A-C. CES FILMS ONT UNE DENSITE ENTRE 2.45 G/CM#3 ET 2.8 G/CM#3 ET UNE DURETE JUSQU'A 50 GPA. ILS SONT SEMICONDUCTEURS AVEC UN GAP OPTIQUE DE 0.3 EV ET UNE RESISTIVITE ELECTRIQUE DE 10#5 CM. CES PROPRIETES SONT DEGRADEES SI L'ENERGIE CINETIQUE DES PARTICULES EVAPOREES EST DIMINUEE. L'ANALYSE PHYSICO-CHIMIQUE DE CES COUCHES MINCES A ETE FAITE EN UTILISANT LES SPECTROSCOPIES DE PHOTOEMISSION (XPS ET UPS), D'ABSORPTION DES RAYONS X (NEXAFS) ET RAMAN. CETTE ANALYSE REVELE QUE CES COUCHES SONT CONSTITUEES PAR DES ATOMES DE CARBONE HYBRIDES SP#2 ET SP#3. LA PROPORTION DES LIAISONS SP#3 PAR RAPPORT AUX LIAISONS SP#2 EST DE 40% POUR LES COUCHES DURES (45 GPA) ET 25% POUR LES MOINS DURES (22 GPA). LES RESULTATS NEXAFS OBTENUS EN DETECTION D'ELECTRON ET EN FLUORESCENCE SEMBLENT INDIQUER UN GRADIENT DE DENSITE DU MATERIAU, CELLE-CI AUGMENTANT DE LA SURFACE VERS LE VOLUME. FINALEMENT, LA SIMILITUDE OBSERVEE ENTRE LES SPECTRES RAMAN DE FILMS DE A-C AVEC DES DURETES SEMBLABLES MAIS DES GAP OPTIQUES RADICALEMENT DIFFERENTS INDIQUENT QUE LA SPECTROSCOPIE RAMAN EST PLUS SENSIBLE A L'ORGANISATION STRUCTURALE QU'AUX PROPRIETES ELECTRONIQUES DES DEPOTS DE A-C
Author : Wenpin Peter Shen
Publisher :
ISBN 13 :
Total Pages : 300 pages
Book Rating : 4.:/5 (33 download)
Download or read book II-VI Compound Semiconductor and High T(c) Superconductor Thin Films Grown by Pulsed Laser Deposition written by Wenpin Peter Shen and published by . This book was released on 1994 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Christopher W. Brink
Publisher :
ISBN 13 :
Total Pages : 94 pages
Book Rating : 4.:/5 (435 download)
Download or read book Growth of Pb2FeO4 Thin Films Via Pulsed Laser Deposition written by Christopher W. Brink and published by . This book was released on 2008 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ratnakar Palai
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)
Download or read book Growth, Optimisation and Characterisation of Pulsed Laser Deposited Nd-based High Temperature Superconducting Thin Films for Device Applications written by Ratnakar Palai and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
