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Title: | Temperature dependent spectroscopic study of the electronic structure of phosphorus in n-type CVD diamond films | Authors: | HAENEN, Ken MEYKENS, Kristien NESLADEK, Milos KNUYT, Gilbert STALS, Lambert Teraji, T Koizumi, S Gheeraert, E |
Issue Date: | 2000 | Publisher: | ELSEVIER SCIENCE SA | Source: | DIAMOND AND RELATED MATERIALS, 9(3-6). p. 952-955 | Abstract: | In this work we used the quasi-steady-state photocurrent method and photothermal ionisation spectroscopy (PTIS) to study the electronic structure of the P-related level in n-type phosphorus doped CVD diamond. Previously, we reported the existence of two optically active defect levels, labelled X-P1 and X-P2, in the bandgap of these P-doped layers. X-P2 appeared to be only present in films showing high resistivity. Here we present a detailed PTIS and photocurrent study of the photoionisation cross-section, from liquid helium up to room temperature. At low temperatures, samples containing only the X-P1 defect show a phonon-induced oscillatory photoconductivity, giving information about the electronic structure of this defect. Additionally, with PTIS a sharp maximum was detected around 565 meV, originating from a thermal promotion of charge carriers from an excited state of the phosphorus-related level into the conduction band. We also discuss different models for the optical ionisation cross-section of the P-related level (e.g. shallow level, deep level). (C) 2000 Elsevier Science S.A. All rights reserved. | Notes: | Limburgs Univ Ctr, Div Mat Phys, Inst Mat Res, B-3590 Diepenbeek, Belgium. Natl Inst Res Inorgan Mat, NIRIM, Res Ctr Adv Mat, Tsukuba, Ibaraki 3050044, Japan. CNRS, Etud Proprietes Elect Solides Lab, F-38042 Grenoble, France.Haenen, K, Limburgs Univ Ctr, Div Mat Phys, Inst Mat Res, Univ Campus,Wetenschapspk 1, B-3590 Diepenbeek, Belgium. | Keywords: | n-type doping; phosphorus; photoconductivity; spectroscopy | Document URI: | http://hdl.handle.net/1942/2907 | DOI: | 10.1016/S0925-9635(99)00202-2 | ISI #: | 000087382400145 | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2001 |
Appears in Collections: | Research publications |
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