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- Title
Observation of an ultraviolet emission band in TiO<sub>2</sub> nanocrystals doped with Eu<sup>3+</sup>.
- Authors
Zeng, Q. G.; Ding, Z. J.; Zhang, Z. M.
- Abstract
The photoluminescence spectra of titanium dioxide (TiO2) nanocrystals doped with Eu3+ (molar ratio Eu3+/TiO2 = 0, 1, 2, 4%) are investigated under different excitation wavelengths. An ultraviolet band of emission energy higher than the energy gap is found for excitation wavelengths larger than 315 nm when the Eu3+ content is higher than 2%. The new emission band redshifts and its emission intensity is intensified with the increase of excitation wavelength. The emission mechanism for the new ultraviolet emission band is analyzed.
- Subjects
TITANIUM dioxide; ULTRAVIOLET radiation; EMISSIONS (Air pollution); PHOTOLUMINESCENCE; NANOCRYSTALS
- Publication
Journal of Materials Science, 2007, Vol 42, Issue 11, p3778
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-006-0411-2