Münster 1997 – scientific programme

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HL: Halbleiterphysik

HL 11: Poster I

HL 11.13: Poster

Monday, March 17, 1997, 15:30–18:30, Z

Selection of Diamond Substrates by Cathodoluminescence for Electronic Applications — •A. A. Melnikov¹, A. M. Zaitsev², V. S. Varichenko^1,2, A. V. Denisenko², and W. R. Fahrner² — ¹Belarussian State University, HEII Laboratory, Minsk 22 0050, Belarus — ²Fern University Hagen, LGBE, Haldener Str. 182, 58084 Hagen, Germany

Recently it has been suggested to use insulating (intentionally undoped) diamond as an active media for charge carrier transport in diamond based electronic devices. A problem arrising in this connection is the selection and an appropriate characterization of diamonds for intended for this purposes. We suggest to use cathodoluminescence (CL) as an effective tool to solve this problem. Relative intensity of the free exciton (FE) recombination line (at 235 nm) is taken as a measure of the substrate quality. A correlation between the FE intensity and electrical parameters of p-i-p, p-i-n and p-i-M devices has been shown for different type of diamond substrates. It has been also demonstrated that CL of the diamond substrates can well predict the emission spectra of the bipolar p-i-n light emitting device made thereon.