Investigation of Some Ce3+-Activated Phosphors
- 15 December 1967
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 47 (12) , 5139-5145
- https://doi.org/10.1063/1.1701771
Abstract
The fluorescence of a number of new Ce3+‐activated phosphors is described and discussed. Only host lattices with a sublattice consisting of trivalent lanthanide ions are used to avoid charge compensation of the Ce3+ ion. Usually the Ce3+ emission is in the near‐ultraviolet region. Y3Al5O12–Ce and SrY2O4–Ce, however, show emission in the visible region with a maximum in the green. Conditions for visible Ce3+ emission are indicated, viz., large crystal‐field splittings (Y3Al5O12–Ce) or a large Stokes shift (SrY2O4–Ce). In a number of cases we were able to observe all crystal‐field components of the excited 5d level of Ce3+. The cubic crystal‐field splitting of the 5d level varies strongly with host lattice from 7000 to 14 000 cm−1. The position of the center of the 5d levels in oxides is about 30% lower than in the free ion. For some phosphors we observed more than one emission band at room temperature. This is due to fluorescence from higher excited levels. Efficient energy transfer from Ce3+ to Cr3+ was observed in Y3Al5O12.Keywords
This publication has 14 references indexed in Scilit:
- The absorption of the Cr3+ ion in host lattices containing pentavalent cationsJournal of Inorganic and Nuclear Chemistry, 1967
- A NEW PHOSPHOR FOR FLYING-SPOT CATHODE-RAY TUBES FOR COLOR TELEVISION: YELLOW-EMITTING Y3Al5O12–Ce3+Applied Physics Letters, 1967
- Ultraviolet Absorption Spectra ofin Alkaline-Earth FluoridesPhysical Review B, 1967
- Oxygen coordinates of compounds with garnet structureActa Crystallographica, 1965
- Fluorescence in Garnets and Other CrystalsPhysical Review B, 1965
- Fluorescent Properties of Some Europium-Activated PhosphorsJournal of the Electrochemical Society, 1964
- Crystal-Field Spectra of d3,7 Ions. III. Spectrum of Cr3+ in Various Octahedral Crystal FieldsThe Journal of Chemical Physics, 1963
- CHEMICAL BONDINGPublished by Elsevier ,1962
- Optical Properties of Zinc Fluoride Phosphors*Journal of the Optical Society of America, 1948
- Luminescence of cerium compoundsPhysica, 1941