Повнотекстовий пошук
Пошуковий запит: (<.>AT=Kononets Energy migration processes in$<.>) |
Загальна кількість знайдених документів : 1
|
1. |
Kononets N. V. Energy migration processes in phosphate nanocrystals: size and dimensionality dependence [Електронний ресурс] / N. V. Kononets, V. V. Seminko, P. O. Maksimchuk, I. I. Bespalova, V. K. Klochkov, Yu. V. Malyukin // Физика низких температур. - 2018. - Т. 44, № 5. - С. 573-579. - Режим доступу: http://nbuv.gov.ua/UJRN/PhNT_2018_44_5_11 Peculiarities of electronic excitation energy migration in phosphate nanocrystals with three-dimensional (EuPO4) and one-dimensional (EuP3O9) arrangement of regular ions under variation of concentration of both energy traps (Nd<^>3+ ions) and scattering centres (La<^>3+ ions) are discussed in the paper. Processes of energy migration in both EuPO4 and EuP3O9 nanocrystals are phonon-assisted ones due to absence of resonance between energy levels of adjacent Eu<^>3+ ions. The distance of energy migration for both EuPO4 and EuP3O9 nanocrystals was found to be equal to tens of nanometres, however, for EuPO4 nanocrystals energy migration leads to stronger quenching of Eu<^>3+ luminescence. For 10 nm EuPO4 nanocrystals sufficient hampering of energy migration is observed due to the depletion of the low-energy phonon spectrum as a result of the phonon confinement effect.
|
|
|