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Open Access research with a European policy impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by Strathclyde researchers, including by researchers from the European Policies Research Centre (EPRC).

EPRC is a leading institute in Europe for comparative research on public policy, with a particular focus on regional development policies. Spanning 30 European countries, EPRC research programmes have a strong emphasis on applied research and knowledge exchange, including the provision of policy advice to EU institutions and national and sub-national government authorities throughout Europe.

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Hydrogen-related photoluminescent centers in SiC

Prezzi, D. and Eberlein, T.A.G. and Jones, R. and Hourahine, B. and Briddon, P.R. and Öberg, S. (2004) Hydrogen-related photoluminescent centers in SiC. Physical Review B: Condensed Matter and Materials Physics, 70 (20). ISSN 1098-0121

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Abstract

Local density functional calculations are used to investigate models of the center responsible for a prominent set of luminescent lines with zero-phonon lines around 3.15 eV in hydrogen rich 4H-SiC and previously attributed to VSi-H. We find that the electronic structure of this defect and the character of its vibrational modes are inconsistent with this assignment. In contrast, a H2 * center, bound to a carbon anti-site, is more stable than the isolated molecule and possesses a donor level close to that observed for the H-lines. Moreover, its vibrational modes are in good agreement with experiment. A possible mechanism for the radiation enhanced quenching of the defect is discussed.