0538907 - FZÚ 2021 RIV NL eng J - Článek v odborném periodiku
Nagirnyi, V. - Spassky, D. - Laguta, Valentyn - Buryi, Maksym - Kirm, M. - Omelkov, S. - Romet, I. - Tupitsyna, I. - Dorenbos, P.
Energy transfer to luminescent impurity by thermally quenching excitons in CdWO₄:Sm.
Journal of Luminescence. Roč. 228, Dec (2020), s. 1-10, č. článku 117609. ISSN 0022-2313. E-ISSN 1872-7883
Institucionální podpora: RVO:68378271
Klíčová slova: cadmium tungstate * samarium impurity * exciton mobility * electron-paramagnetic resonance * energy transfer
Obor OECD: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Impakt faktor: 3.599, rok: 2020
Způsob publikování: Omezený přístup
https://doi.org/10.1016/j.jlumin.2020.117609

CdWO4:Sm single crystals were studied by different spectroscopies in the temperature range of 4–750 K. A hopping diffusion of self-trapped excitons and energy transfer to Sm3+ centres is demonstrated. The mechanism of energy transfer includes the formation of a Sm3+ bound exciton either by direct excitation or in the result of a thermally stimulated hopping diffusion of self-trapped excitons as well as a sequential trapping of charge carriers near the Sm3+ ions. The energy transfer from the perturbed excitons to Sm3+ ions is controlled by an electric dipole-dipole or exchange interaction and it is terminated in the temperature range of 450–650 K due to the thermal destruction of Sm3+-perturbed excitons. In the case of nearsurface excitations created in the energy region of high absorption coefficients by 5-eV photons, the Sm3+ emission is additionally quenched by surface-induced quenching centres.
Trvalý link: http://hdl.handle.net/11104/0316642