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Charge transport in single crystal CVD diamond studied at high temperatures

Crnjac, Andreo; Rodriguez-Ramos, Mauricio; Skukan, Natko; Pomorski, Michal; Jakšić, Milko (2021) Charge transport in single crystal CVD diamond studied at high temperatures. Journal of Physics D: Applied Physics, 54 (46). ISSN 0022-3727

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The capability of single crystal diamonds to maintain their unique electronic properties even at high temperatures is, in particular, relevant for its applications as a radiation detector. In order to explore characteristics of charge transport at high temperatures (up to 450 °C), diamond was exposed to MeV energy ions, both, to induce radiation damage and to probe subsequent influence on detector’s properties. Dependence of mobility-lifetime product with temperature has been obtained for electrons and holes. For holes, mu-tau displays a linear degradation with rising temperature, while for electrons, change with temperature is less evident. Furthermore, deep trapping levels induced in the material by radiation damage, were studied through time-resolved charge signals. Detrapping time was extracted from this data. Hole trap level, with the activation energy of 0.53 ± 0.01 eV has been detected in the regions of the diamond detector previously irradiated by 5 MeV damaging proton beam, but not in the pristine regions. This indicates that the trap was formed due to defect induction during radiation damage exposure. Activation of this deep level is important for charge transport performance in diamond detectors operating at high temperatures and high radiation conditions.

Item Type: Article
Uncontrolled Keywords: diamond detector; charge transport; radiation damage; high temperature; detrapping
Subjects: NATURAL SCIENCES > Physics > Nuclear Physics
NATURAL SCIENCES > Physics > Condensed Matter Physics
Divisions: Division of Experimental Physics
Project titleProject leaderProject codeProject type
Implementation of activities described in the Roadmap to Fusion during Horizon 2020 through a Joint programme of the members of the EUROfusion consortium-EUROfusionTonči Tadić633053EK
Potpora vrhunskim istraživanjima Centra izvrsnosti za napredne materijale i senzore-Mile Ivanda; Milko Jakšić; Mario Stipčević; Marko KraljKK.
Depositing User: Andreo Crnjac
Date Deposited: 02 Sep 2021 13:06
DOI: 10.1088/1361-6463/ac1e4e

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