GaN films
Investigation of cracks in GaN films grown by combined hydride and metal organic vapor phase epitaxial method
... thermal expansion coefficient (TEC) and lattice constant between GaN and foreign substrates usually induce a large residual stress in thick GaN films. Homoepitaxy is very essential to improve the ...
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Influence of Nonlocality on Amplification of Space Charge Waves in n GaN Films
... due to decrease of the absolute value of the negative dif ferential conductivity. Nevertheless, to obtain the correct value of diffusion coefficient, it is necessary to use the more adequate model, based on the detailed ...
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Preparation and Characterization of Thin, Atomically Clean GaN(0001) and AlN(0001) Films and the Deposition of Thick GaN Films via Iodine Vapor Phase Growth
... of GaN films and GaN wafers, the latter derived, ...of films [4] and of metal contacts [5, 6] subsequently deposited on the contaminated ...stoichiometric GaN surface free of C and O ...
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Conventional and Pendeo-Epitaxial Growth of Non-Polar GaN(11-20) Thin Films on AlN/4H-SiC(11-20) Substrates and Their Characterization and Reduction in Defect Density
... epitaxial GaN seed films and the PE GaN layers were grown in-situ in a cold-wall, vertical, pancake-style metalorganic vapor phase epitaxy (MOVPE) system on research grade, on-axis 4H-SiC ( 11 2 0 ) ...
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Supersonic jet epitaxy of gallium nitride using triethylgallium and ammonia
... homoepitaxial GaN films grown by plasma- assisted MBE has been ...of GaN films grown using low-energy TEG beams are shown in ...the films exhibit surface roughness consistent with ...
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Growth and Characterization of Epitaxial ZnO Thin Films on GaN(0001) Epilayers and ZnO{0001} Substrates Using Metalorganic Chemical Vapor Depositon
... The GaN films are reproducible and have been characterized in detail elsewhere 1,2 ...the GaN surface has a terrace-and step microstructure with widths and heights of 200 nm and ...the GaN ...
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Gallium nitride materials - Progress, status, and potential roadblocks
... thin films on sapphire and silicon carbide substrates as well as previously grown GaN ...in GaN and AlGaN ...MBE GaN films and in two-dimensional electron gases in the AlGaN/GaN ...
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Growth and Characterization of GaN and AlGaN Thin Films and Heterostructures and the Associated Development and Evaluation of Ultraviolet Light Emitting Diodes
... in GaN grown using TMG (TMG GaN); however, only one of these levels has been detected in GaN grown using TEG (TEG ...in GaN is responsible for an acceptor level and carbon from TEG that ...
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Fabrication and properties of ZnO/GaN heterostructure nanocolumnar thin film on Si (111) substrate
... First, GaN thin films were grown on Si (111) substrate by PLD at the growth temperature of 800°C using a GaN cer- amic ...fabrication, GaN tar- get and substrate rotated reversely with a ...
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Strain-related phenomena in GaN thin films
... the GaN films is ...high-quality GaN films ~ FWHM , 10 arc min ! : in homoepi- taxially MBE-grown GaN the yellow luminescence can drop down to the detection limit or appear at medium ...
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Mechanical Deformation Behavior of Nonpolar GaN Thick Films by Berkovich Nanoindentation
... of GaN thin films and substrates with characteristic dimensions in the sub-micron regime, such as hardness and elastic modulus, creep resistance, fracture toughness, and adhesion ...c-plane GaN ...
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Structural and Electrical Characterization of GaN Thin Films on Si(100)
... polycrystalline GaN was obtained indicating the enhance crystallinity of the films with annealing temperature at ...the GaN films was determined by Scanning Electron Microscopy ...pure ...
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Valence band offset of β Ga2O3/wurtzite GaN heterostructure measured by X ray photoelectron spectroscopy
... is 17.12 eV, which is in accordance with the results reported by Hui et al. [15]. Table 2 lists the VBO values determined by substituting the values in Table 1 into a similar for- mula to Equation 1 using different ...
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Structural and magnetic properties of ultra-thin Fe films on metal-organic chemical vapour deposited GaN(0001)
... Fe films deposited on GaN(0001) were ...for films thinner than 4 nm. Both GaN/Fe interface roughness and Fe film coercivity increased with Fe thickness, indicating a possible deterioration of ...
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Characteristics of GaN Thin Films Using Magnetron Sputtering System
... polycrystalline GaN thin film with a hexagonal wurtzite struc- ture under the optimized sputtering conditions of 40 W RF power, 5 mT working pressure, using pure nitrogen gas with a substrate temperature of ...
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Validity of Vegard's rule for Al1-xInxN (0.08<x<0.28) thin films grown on GaN templates
... Several samples show very high discrepancies between the compositions determined by XRD and RBS. Obviously, these can neither be explained by the uncertainties on Vegard ’ s rule nor on binary parameters, which should of ...
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Elimination of leakage in GaN-on-diamond
... create GaN-on-diamond, (described in more detail in [7]) involves a double flip of the GaN epi, an etch of nucleation layers and a diamond growth which exposes the GaN epi to elevated temperatures ...
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InGaN/GaN quantum wells grown on polar and nonpolar GaN substrates
... bulk GaN after HVPE regrowth with 2 ...of GaN in an HVPE system is dominated by the consumption of GaCl with H 2 or NH 3 [36], the growth rate on the (0001) Ga polar surface should be much higher ...
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Impact of alloy fluctuations and Coulomb effects on the electronic and optical properties of c-plane GaN/AlGaN quantum wells
... c-plane GaN/AlGaN QWs and how carrier localization effects ...on GaN/AlGaN QWs, where the effects of alloy fluctuations in the barrier are explored by a non-linear compositional dependence of averaged ...
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Cathodoluminescence spectra of gallium nitride nanorods
... Recently, the applications of semiconductor materials in optoelectronic devices grow rapidly. Among them, due to the high thermal conductivity, wide direct bandgap, and chemical stability, III-V family nitride-based ...
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