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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/3109

Title: On photocurrent (and EPR) study of defect levels in CVD diamond
Authors: Rosa, J
Vanecek, M
NESLADEK, Milos
STALS, Lambert
Issue Date: 1999
Publisher: WILEY-V C H VERLAG GMBH
Citation: PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 172(1). p. 113-122
Abstract: Photocurrent spectroscopy is used for studying electronic defect states in the gap of optical-quality CVD diamond. The constant photocurrent method (CPM), allowing to measure the optical (photoionization) cross-section of defects, is applied on samples with a different surface treatment. The measured photoionization cross-section spectra are discussed and attributed to main defects in CVD diamond layers. A photoionization cross-section of a defect, with an onset at about 2.2 eV, is attributed to the single-substitutional nitrogen defect (EPR P1 resonance at g = 2.0024). This defect is denoted as D2. Additionally, a defect with an onset at about 1.2 eV is observed on "as-grown" samples or after additional hydrogen plasma treatment. This defect, denoted as D1, diminishes after oxidation of the diamond sample surface. The EPR g = 2.0028 resonance, which was also suggested to be H-related, is studied as a function of hydrogenation and oxidation.
Notes: Acad Sci Czech Republ, Inst Phys, CZ-16200 Prague 6, Czech Republic. Limburgs Univ Centrum, Inst Mat Res, Div Mat Phys, B-3590 Diepenbeek, Belgium.Rosa, J, Acad Sci Czech Republ, Inst Phys, Cukrovarnicka 10, CZ-16200 Prague 6, Czech Republic.
URI: http://hdl.handle.net/1942/3109
ISI #: 000079517400013
ISSN: 0031-8965
Type: Journal Contribution
Validation: ecoom, 2000
Appears in Collections: Research publications

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