Abstract
The energies of the 5d excited states of Ce3+ and Pr3+ impurities relative to the conduction band of the insulators Y2SiO5 and Lu2SiO5 were investigated through a temperature and spectrally resolved photoconductivity study. The effective ionization barrier of Pr3+ from the 5d state to the conduction band is found to be 0.15 eV smaller than that of Ce3+ in both Y2SiO5 and Lu2SiO5. The difference is explained by a model, represented by rate equations, that takes into account interconfigurational 4f5d - 4f(2) relaxation for Pr3+, a process that is absent for Ce3+.
| Original language | English (Ireland) |
|---|---|
| Journal | Physical Review B |
| Volume | 71 |
| Publication status | Published - 1 Apr 2005 |
Authors (Note for portal: view the doc link for the full list of authors)
- Authors
- van der Kolk, E,Dorenbos, P,van Eijk, CWE,Basun, SA,Imbusch, GF,Yen, WM