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Publikācija: Angular Dependence of Recombination Luminescence-Detected EPR in a ZnO Crystal

Publication Type Scientific article indexed in SCOPUS or WOS database
Funding for basic activity Unknown
Defending: ,
Publication language English (en)
Title in original language Angular Dependence of Recombination Luminescence-Detected EPR in a ZnO Crystal
Field of research 1. Natural sciences
Sub-field of research 1.3 Physical sciences
Authors A. Fedotovs
Dz. Berzins
U. Rogulis
K. Smits
G. Doke
Artūrs Medvids
Pāvels Onufrijevs
Keywords ODMR | photoluminescence | recombination luminescence | Zinc oxide
Abstract Angular dependency of electron paramagnetic resonance, optically detected by UV-excited recombination luminescence (RL-EPR), was measured for nominally pure ZnO single crystals. Observed magnetic resonances belong to the broad yellow RL band with slow decay centred at 610 nm, which is characteristic of untreated ZnO crystals. In the sample, irradiated with the 266 nm UV laser, an additional RL band centred at 740 nm appears, which has considerably faster decay time than the yellow one. This RL band is characteristic of the luminescence of Fe<sup>3+</sup> ions in the ZnO crystals. It could be observed only after the UV laser treatment. No RL-EPR signal was detected for this RL band. Our spectral simulations show that the observed angular dependences of the RL-EPR spectra can be described considering a simultaneous contribution from two types of deep acceptor centres, i.e. Li<inf>Zn</inf> and a zinc vacancy, V<inf>Zn</inf>.
DOI: 10.1088/0031-8949/90/9/094016
Reference Fedotovs, A., Berzins, D., Rogulis, U., Smits, K., Doke, G., Medvids, A., Onufrijevs, P. Angular Dependence of Recombination Luminescence-Detected EPR in a ZnO Crystal. Physica Scripta, 2015, Vol.90, No.9, pp.1-4. ISSN 0031-8949. e-ISSN 1402-4896. Available from: doi:10.1088/0031-8949/90/9/094016
Additional information Citation count:
ID 21381