Naslov
Charge transport in single crystal CVD diamond studied at high temperatures

Autori
Crnjac, Andreo ; Ramos, Mauricio-Rodriguez ; Skukan, Natko ; Pomorski, Michal ; Jakšić, Milko

Izvornik
Journal of physics D, Applied physics (0022-3727) 54 (2021), 46; 465103, 9

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
diamond detector, charge transport ; radiation damage ; high temperature ; detrapping

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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