Defect Studies in Low-temperature-grown GaAs PDF Download
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Author: David Emory Bliss
Publisher:
ISBN:
Category :
Languages : en
Pages : 406
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Author: David Emory Bliss
Publisher:
ISBN:
Category :
Languages : en
Pages : 406
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 201
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Book Description
High content of excess As is incorporated in GaAs grown by low-temperature molecular-beam-epitaxy (LTMBE). The excess As exists primarily as As antisite defects AsGa and a lesser extent of gallium vacancies V{sub Ga}. The neutral AsGa-related defects were measured by infrared absorption at 1[mu]m. Gallium vacancies, V{sub Ga}, was investigated by slow positron annihilation. Dependence of defect contents on doping was studied by Si and Be dopants. No free carriers are generated by n-type or p-type doping up to 1019 cm−3 Si or Be. Raman data indicate Be occupies Ga substitutional sites but Si atom is not substitutional. Si induces more As{sub Ga} in the layer. As As{sub Ga} increases, photoquenchable As{sub Ga} decreases. Fraction of photoquenchable defects correlates to defects within 3 nearest neighbor separations disrupting the metastability. Annealing reduces neutral As{sub Ga} content around 500C, similar to irradiation damaged and plastically deformed Ga{sub As}, as opposed to bulk grown GaAs in which As{sub Ga}-related defects are stable up to 1100C. The lower temperature defect removal is due to V{sub Ga} enhanced diffusion of As{sub Ga} to As precipitates. The supersaturated V{sub GA} and also decreases during annealing. Annealing kinetics for As{sub Ga}-related defects gives 2.0 ± 0.3 eV and 1.5 ± 0.3 eV migration enthalpies for the As{sub Ga} and V{sub Ga}. This represents the difference between Ga and As atoms hopping into the vacancy. The non-photoquenchable As{sub Ga}-related defects anneal with an activation energy of 1.1 ± 0.3eV. Be acceptors can be activated by 800C annealing. Temperature difference between defect annealing and Be activation formation of As{sub Ga}-Be{sub Ga} pairs. Si donors can only be partially activated.
Author:
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ISBN:
Category :
Languages : en
Pages : 32
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The major aim of our research has been a theoretical investigation of (1) important point defect complexes in low-temperature-grown (LT) GaAs and (2) the microscopic processes occurring at the surface during growth of GaAs films, which determine how much excess arsenic will be incorporated into the material.
Author: Valdemar Meisen
Publisher:
ISBN:
Category :
Languages : en
Pages : 269
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Author: Daniel M. Fleetwood
Publisher: CRC Press
ISBN: 1420043773
Category : Science
Languages : en
Pages : 772
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Uncover the Defects that Compromise Performance and ReliabilityAs microelectronics features and devices become smaller and more complex, it is critical that engineers and technologists completely understand how components can be damaged during the increasingly complicated fabrication processes required to produce them.A comprehensive survey of defe
Author: Zul Azhar bin Zahid Jamal
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: J.P. Hirtz
Publisher: Elsevier
ISBN: 1483290425
Category : Science
Languages : en
Pages : 365
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These three day symposia were designed to provide a link between specialists from university or industry who work in different fields of semiconductor optoelectronics. Symposium A dealt with topics including: epitaxial growth of III-V, II-VI, IV-VI, Si-based structures; selective-area, localized and non-planar epitaxy, shadow-mask epitaxy; bulk and new optoelectronic materials; polymers for optoelectronics. Symposium B dealt with III-V epitaxial layers grown by low temperature molecular beam epitaxy, a subject which has undergone rapid development in the last three years.
Author: Gerald L. Witt
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 320
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The MRS Symposium Proceeding series is an internationally recognised reference suitable for researchers and practitioners.
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Publisher: Academic Press
ISBN: 008086449X
Category : Science
Languages : en
Pages : 449
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GENERAL DESCRIPTION OF THE SERIESSince its inception in 1966, the series of numbered volumes known as Semiconductors and Semimetals has distinguished itself through the careful selection of well-known authors, editors, and contributors. The "Willardson and Beer" Series, as it is widely known, has succeeded in publishing numerous landmark volumes and chapters. Not only did many of these volumes make an impact at the time of their publication, but they continue to be well-cited years after their original release. Recently, Professor Eicke R. Weber of the University of California at Berkeley joined as a co-editor of the series. Professor Weber, a well-known expert in the field of semiconductor materials, will further contribute to continuing the series' tradition of publishing timely, highly relevant, and long-impacting volumes. Some of the recent volumes, such as Hydrogen in Semiconductors, Imperfections in III/V Materials, Epitaxial Microstructures, High-Speed Heterostructure Devices, Oxygen in Silicon, and others promise indeed that this tradition will be maintained and even expanded.Reflecting the truly interdisciplinary nature of the field that the series covers, the volumes in Semiconductors and Semimetals have been and will continue to be of great interest to physicists, chemists, materials scientists, and device engineers in modern industry. GENERAL DESCRIPTION OF THE VOLUMEThis volume has contributions on Advanced Characterization Techniques with a focus on defect identification. The combination of beam techniques with electrical and optical characterization has not been discussed elsewhere.
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Category :
Languages : en
Pages :
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