Spectra of europium-doped yttrium oxide and yttrium vanadate phosphors
- Cite this article as:
- Elmanharawy, M.S., Eid, A.H. & Kader, A.A. Czech J Phys (1978) 28: 1164. doi:10.1007/BF01602806
The spectral distributions of the visible absorption and fluorescence emission under electron beam excitation of Eu3+-doped (Y2O3) and (YVO4) powders have been detected and analyzed. (Y2O3: Eu3+) has a cubicC crystal structure with a unit cell dimension a=10·61 Å. Its observed transitions from7F0 to many upper states have been recognized; the observed number of Stark components is in agreement with that based on theC2 site symmetry of the Eu3+ ion in Y2O3. Eu3+-doped yttrium vanadate has a typical zircon tetragonal crystal structure with unit cell dimensions ofc=6·29 Å anda=7·11 Å. The observed transitions in (Eu3+: YVO4) have been identified and assigned in accordance with theD2d site symmetry of the Eu3+ ion in this lattice.