| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1813418 | Physica B: Condensed Matter | 2009 | 5 Pages |
Abstract
A luminescent mechanism was constructed for the broad band emission spectra of the X1 phase of the Y2SiO5:Ce phosphor powder. Four Gaussian peaks fit to the cathodoluminescent (CL) and photoluminescent (PL) spectra were attributed to the two different sites (A1 and A2) of the Ce3+ ion in the host matrix and the difference in orientation of the neighbour ions in the complex crystal structure. Each Ce3+ site gives rise to transitions from the 5d to the two (therefore two peaks) 4f energy levels (2F5/2 and 2F7/2 due to crystal field splitting). Energy transfer from other defect levels in the matrix was also observed.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
E. Coetsee, J.J. Terblans, O.M. Ntwaeaborwa, H.C. Swart,