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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/11768

Title: Surface states and photo-induced charge transfer on oxygen-terminated chemical vapor deposition diamond
Authors: DEFERME, Wim
Mackova, A.
Issue Date: 2011
Publisher: American Institute of Physics
Citation: JOURNAL OF APPLIED PHYSICS, 109(4) (ART N° 063701)
Abstract: Time-of-Flight (ToF) experiments were carried out to study the electrical transport and charge trapping properties of oxidised freestanding single crystalline (100) CVD diamond crystals. It is shown that the diamond surface and properties of the electrical contacts are of extreme importance, influencing measured charge carrier mobility values. While sputtered Al contacts yield textbook ToF spectra and electron mobilities µe exceeding 1860 cm²/Vs, thermally deposited contacts suffer from enhanced trapping. We propose a model in which the observed polarization effects can be explained by charge transfer to oxygen-related surface states, which interact with surface adsorbates, according to the well-known transfer-doping model.
URI: http://hdl.handle.net/1942/11768
DOI: 10.1063/1.3556748
ISI #: 000289149900054
ISSN: 0021-8979
Category: A1
Type: Journal Contribution
Validation: ecoom, 2012
Appears in Collections: Research publications

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