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2 edition of study of the precipitation of doped InP and GaAs single crystals found in the catalog.

study of the precipitation of doped InP and GaAs single crystals

Nigel Andrew Smith


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Study of the precipitation of doped InP and GaAs single crystals by Nigel Andrew Smith Download PDF EPUB FB2

Fig. shows X-ray 2θ/ω diffraction patterns of 1-μm-thick C 60 uniformly doped GaAs and undoped GaAs layers grown at °C on GaAs () substrates. Undoped GaAs layers and C 60 doped GaAs layers with C 60 concentration below 8×10 17 cm −3 are confirmed to show a single and sharp.

A series of InP single crystals doped with Mn, Fe, Ti and Ni with two levels of doping, (i) larger (heavy doping); and (ii) smaller (light doping) than the background doping were grown using the. Precipitation processes in the p-type, n-type, and intrinsic GaAs layers grown by molecular beam epitaxy at a low temperature were studied by transmission electron microscopy.

The average spacing, average diameter, and volume fraction of precipitates were measured as a function of the annealing time for the annealing temperature of ° by: 7.

In this article, we exhibit the influence of doping on nanoindentation-induced incipient plasticity in GaAs and InP crystals. Nanoindentation experiments carried out on a GaAs crystal show a reduction in contact pressure at the beginning of the plastic deformation caused by an increase in Si doping.

Given that the substitutional Si defects cause a decrease in the pressure of the GaAs-I &rarr Author: Dariusz Chrobak, Michał Trębala, Artur Chrobak, Roman Nowak.

The nature of precipitates found in Fe-doped single crystals of InP grown by the LEC method has been investigated. SEM studies show that the precipitates have only one type of morphology namely, a rhombohedral shape whilst back-scattered electron and EDAX investigations establish that a significant proportion of the precipitates are two-phase mixtures of FeP 2 and by: The spectral distribution of the transmittance T and the reflectance R of Zn doped GaAs single crystals have been investigated.

The optical constants "n" and "k" of GaAs:Zn are estimated in the. Spectroscopic Study of the Shallow Donor Confined in GaAs/Al x Ga 1-x As Quantum Wells. Recombination Lifetime Study from the InGaAs/GaAs Single Quantum Wells.

Photoluminescence Studies of (GaAs) m /(Al x Ga 1-x As) n Short Period Superlattices under High Pressure. Inter-band Transition Modulated Cyclotron Resonance in Semiconductor.

The lattice imperfections in GaAs single crystals introduced as a result of the in‐diffusion of lithium at high temperatures were investigated by using transmission electron microscopy. The effects of diffusion temperature, time, postdiffusion annealing treatments, and the presence of other impurities (primarily Zn at concentration levels of 1×10 19 cm −3) in the host crystal, on the.

Yb Intra-4f-SheII Luminescence in Yb- and Zn-Doped InP A. Taguchi and K. Takahei Infrared Absorption Lines in Hydrogen-Plasma Treated Se-Doped GaAs J.H. Svensson and J. Weber Monoenergetic Positron Beam Study of Heavily Si-doped GaAs Grown by MOCVD using Tertiarybutylarsine S.

Chichibu, A. Iwai, Y. Nakahara, S. Matsumoto. Compressive deformation of undoped and In‐doped GaAs single crystals has been carried out in [] and [] orientations in the temperature range – °C. Indium additions, at levels of 1–2×10 2 0 atoms cm − 3, result in critical resolved shear stress (CRSS) values that are about twice as large as the undoped crystals in the temperature range of – °C.

The patterned InP single crystals are configured as high-performance transistors and photodetectors directly on amorphous SiO 2 growth substrates, with performance matching state-of. InP single crystals have been used as the substrates for optical devices such as LDs, LEDs and PDs and for electronic devices such as HEMTs, HBTs and OEICs.

The authors have successfully developed mm-long 2-inch diameter crystals doped with S and mm-long 3-inch diameter crystals doped with S or Fe by the VCZ method.

pure and doped BaCaTiO 3 and BaSrTiO 3 single crystals 73 sankar Structural analysis of as-grown, implanted LEC-GaAs single crystal and CBE growth and ECV profiling of lnGaAs(P) / lnP, AllAs/lnP and multi quantum well structures 74 i Studies on the effect of surface and interface. Precipitation in low temperature grown GaAs The precipitation of arsenic in GaAs epitaxially grown at low temperature (LT GaAs) has been studied as a function of the post-growth annealing temperature by three independent methods: transmission electron microscopy (TEM), Raman scattering, and for the first time the anomalous small angle X-ray scattering (ASAXS).

The problem of preparing large dislocation-free GaAs single crystals has not yet been solved even under laboratory conditions. Mass production of single crystals with a relatively high dislocation density (10 5 cm-2) will require methods for decreasing the inhomogeneity of properties. For this, the reasons and mechanisms of formation of.

Undoped and Cr, V, O 2, and In doped GaAs single crystals grown by liquid encapsulated Czochralski method were analyzed. As-precipitates were investigated by optical microscope with Nomarski contrast after AB solution etching (AB-EPD), by laser scattering tomography (LST), by cathodoluminescence (CL) and transmission electron microscope (TEM).

15 Growth of III-V and II-VI Single Crystals by the Vertical-gradient-freeze Method T. Asahi, K. Kainosho, K. Kohiro, A. Noda, K. Sato and O.

Oda Introduction InP Crystal Growth by the VGF Method GaAs Crystal Growth by the VGF Method Growth of Undoped GaAs Growth of Si-doped GaAs Crystals Carbon-doped GaAs and InP grown at low temperatures by molecular-beam epitaxy contain a high concentration of antisite defects which gives rise to ultrafast.

This volume deals with the technologies of crystal fabrication, of crystal machining, and of epilayer production and is the first book on industrial and scientific aspects of crystal and layer production. The major industrial crystals are treated: Si, GaAs, GaP, InP, CdTe, sapphire, oxide and halide scintillator crystals, crystals for optical, piezoelectric and microwave applications and more.

Defect Recognition and Image Processing in Semiconductors book. Proceedings of the seventh conference on Defect Recognition and Image Processing, Berlin, September Characterization of denuded zones around dislocations in doped GaAs by phase contrast microscopy and photoluminescence Microdefects in semiconductor single crystals.

A large amount of studies have focused on the Si-doped AI- GaAs, but there are only a few reports'-* on donor deep centers in GaAsP, Furthermore, results by different authors are not always consistent. In this letter donor deep levels in Te-doped GaAsl-,P, alloy compound for an .analysis to study the chemical properties of LT-GaAs:C and LT-InP:C.

An ion-implanted reference Br standard was used to quantify the Br incorporation level as a function of growth temperatures and study their thermal stability.

Å-thick C-doped LT layers were grown at successively lower tem-peratures, each separated by Å undoped. Scanning electron microscopy images of (a) InP-based substrate-like and (b) GaAs-based membrane-like planar photonic crystals [(a) Ferrini et al., a, (b) Sugimoto et al., ].

Nowadays, due to this extensive research effort, the conception and fabrication of such photonic structures have gained a complete maturity leading to the.