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Title: Characteristic defects in CVD diamond: optical and electron paramagnetic resonance study
Authors: Nesládek, M
Meykens, K
Haenen, K
Navratil, J
Quaeyhaegens, C
Stals, LM
Stesmans, Andre
Iakoubovskii, Konstantin
Adriaenssens, Guy
Rosa, J
Vanêcek, M #
Issue Date: Aug-1999
Publisher: Elsevier science sa
Series Title: Diamond and related materials vol:8 issue:8-9 pages:1480-1484
Abstract: Constant photocurrent method (CPM), electron paramagnetic resonance (EPR), and infra-red optical absorption (FTIR) techniques are used to study characteristic defects in the gap of free-standing optical-quality CVD diamond. It is shown that the gap density of states (DOS) is very sensitive to oxidation, hydrogenation and annealing treatments. The room-temperature (RT) EPR and CPM measurements reveal a well-defined single substitutional nitrogen defect (P1). The photoionization energy of this defect is E-i = 2.2 eV. The presence of another defect state, denoted previously as D1 (E-i = 1.2 eV) is discussed. This (D1) defect level is stable up to high annealing temperatures. The changes observed in the EPR spectra after oxidation/hydrogenation are discussed. IR absorption in the CH-stretch band and in one-phonon absorption regions is investigated. (C) 1999 Elsevier Science S.A. All rights reserved.
ISSN: 0925-9635
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Semiconductor Physics Section
# (joint) last author

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