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High-field Electrical Transport in Single Crystal CVD Diamond Diodes
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity. elektricitetslära och åskforskning.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity. elektricitetslära och åskforskning.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity. elektricitetslära och åskforskning.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity. elektricitetslära och åskforskning.
2006 (English)In: Advances in Science and Technology, Vol. 48, 73-76 p.Article in journal (Refereed) Published
Place, publisher, year, edition, pages
2006. Vol. 48, 73-76 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-22412OAI: oai:DiVA.org:uu-22412DiVA: diva2:50185
Available from: 2007-01-23 Created: 2007-01-23 Last updated: 2015-12-10
In thesis
1. Charge Transport in Single-crystalline CVD Diamond
Open this publication in new window or tab >>Charge Transport in Single-crystalline CVD Diamond
2010 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Diamond is a semiconductor with many superior material properties such as high breakdown field, high saturation velocity, high carrier mobilities and the highest thermal conductivity of all materials. These extreme properties, as compared to other (wide bandgap) semiconductors, make it desirable to develop single-crystalline epitaxial diamond films for electronic device and detector applications. Future diamond devices, such as power diodes, photoconductive switches and high-frequency field effect transistors, could in principle deliver outstanding performance due to diamond's excellent intrinsic properties. However, such electronic applications put severe demands on the crystalline quality of the material.

Many fundamental electronic properties of diamond are still poorly understood, which severely holds back diamond-based electronic device and detector development. This problem is largely due to incomplete knowledge of the defects in the material and due to a lack of understanding of how these defects influence transport properties.

Since diamond lacks a shallow dopant that is fully thermally activated at room temperature, the conventional silicon semiconductor technology cannot be transferred to diamond devices; instead, new concepts have to be developed. Some of the more promising device concepts contain thin delta-doped layers with a very high dopant concentration, which are fully activated in conjunction with undoped (intrinsic) layers where charges are transported. Thus, it is crucial to better understand transport in high-quality undoped layers with high carrier mobilities.

The focus of this doctoral thesis is therefore the study of charge transport and related electronic properties of single-crystalline plasma-deposited (SC-CVD) diamond samples, in order to improve knowledge on charge creation and transport mechanisms. Fundamental characteristics such as drift mobilities, compensation ratios and average pair-creation energy were measured. Comparing them with theoretical predictions from simulations allows for verification of these models and improvement of the diamond deposition process.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2010. 87 p.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 746
Keyword
CVD diamond, wide-bandgap semiconductor, single-crystalline diamond, carrier transport, time-of-flight, drift velocity, mobility, compensation, pair-creation, electronic devices, diamond detector, diamond diode
Identifiers
urn:nbn:se:uu:diva-122794 (URN)978-91-554-7815-5 (ISBN)
Public defence
2010-06-04, Siegbahnsalen, Ångströmlaboratoriet, Lägerhyddsvägen 1, Uppsala, 13:15 (English)
Opponent
Supervisors
Available from: 2010-05-12 Created: 2010-04-20 Last updated: 2010-05-18Bibliographically approved

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