- Tytuł:
- Rare-Earth Excitation Mechanism in Wide Band Gap H-VI Compounds
- Autorzy:
-
Karpińska, K.
Świątek, K.
Godlewski, M.
Niinistö, L.
Leskelä, M. - Powiązania:
- https://bibliotekanauki.pl/articles/1929798.pdf
- Data publikacji:
- 1993-11
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
71.55.Gs
76.30.Kg
78.55.Et - Opis:
- The excitation mechanism of rare-earth emission in Eu and Ce doped CaS and SrS is studied. It is proposed that the Eu and probably also Ce emission is induced by the photoionization transition of the rare-earth ion, which is followed by the carrier trapping via the excited state of the ion. At increased temperatures the efficiency of excitation is reduced. We explain this effect by the carrier emission from the excited core state of the rare-earth ion to the continuum of the conduction (valence) band states. It is also suggested that the charge transfer state of the rare-earth ion may act as the intermediate state in the carrier trapping.
- Źródło:
-
Acta Physica Polonica A; 1993, 84, 5; 959-962
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł