Upconversion Luminescence of Gd{sub 2}O{sub 3} Nanocrystals Doped with Er{sup 3+} and Yb{sup 3+} Ions
- Ural Federal University (Russian Federation)
The upconversion luminescence (UCL) of nanocrystalline gadolinium oxide (Gd{sub 2}O{sub 3}) doped with Er{sup 3+} and Yb{sup 3+} ions has been studied in the temperature range of 90–400 K. The nanocrystals were synthesized by chemical vapor deposition and possessed a cubic crystalline structure with an average particle size within 48–57 nm. It is established that the USL intensity in the red ({sup 4}F{sub 9/2} → {sup 4}I{sub 15/2} transition in Er3+ ion) and green ({sup 4}S{sub 3/2} → {sup 4}I{sub 15/2} transition) spectral regions depends on the sample temperature and concentration of dopant ions, as well as on the additional structural defects (anion vacancies) created in the crystal lattice by the introduction of Zn{sup 2+} ions or irradiation with high-energy (10 MeV) electrons. The luminescence efficiency and spectrum of the upconversion phosphor are determined by energy transfer processes.
- OSTI ID:
- 22786357
- Journal Information:
- Technical Physics Letters, Vol. 44, Issue 7; Other Information: Copyright (c) 2018 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7850
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CHEMICAL VAPOR DEPOSITION
CONCENTRATION RATIO
CRYSTAL LATTICES
DEFECTS
DOPED MATERIALS
ENERGY TRANSFER
ERBIUM ADDITIONS
GADOLINIUM OXIDES
LUMINESCENCE
MEV RANGE 01-10
NANOSTRUCTURES
PARTICLE SIZE
PHOSPHORS
SPECTRA
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
VACANCIES
YTTERBIUM ADDITIONS