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Title: | Characteristic defects in CVD diamond: optical and electron paramagnetic resonance study | Authors: | NESLADEK, Milos MEYKENS, Kristien HAENEN, Ken NAVRATIL, Jiri QUAEYHAEGENS, Carl STALS, Lambert Stesmans, A Iakoubovskij, K ADRIAENSENS, Peter Rosa, J Vanecek, M |
Issue Date: | 1999 | Publisher: | ELSEVIER SCIENCE SA | Source: | DIAMOND AND RELATED MATERIALS, 8(8-9). p. 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. | Notes: | Limburgs Univ Ctr, Div Mat Phys, Inst Mat Res, B-3590 Diepenbeek, Belgium. Katholieke Univ Leuven, Lab Halfgeleiderfys, B-3001 Heverlee, Belgium. Acad Sci Czech Republ, Inst Phys, Prague 6, Czech Republic.Nesladek, M, Limburgs Univ Ctr, Div Mat Phys, Inst Mat Res, Univ Campus,Wetenschapspk 1, B-3590 Diepenbeek, Belgium. | Keywords: | diamond defects; hydrogen; oxidation; spectroscopy | Document URI: | http://hdl.handle.net/1942/3048 | DOI: | 10.1016/S0925-9635(99)00072-2 | ISI #: | 000081933800023 | Type: | Journal Contribution | Validations: | ecoom 2000 |
Appears in Collections: | Research publications |
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