Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/14223
Title: Optical properties of octahedral KTaO3 nanocrystalline
Authors: Zou, Y
Hu, Y
Gu, H
Wang, Y 
Keywords: KTaO3
Nanostructures
Optical properties
Issue Date: 2009
Publisher: Elsevier
Source: Materials chemistry and physics, 2009, v. 115, no. 1, p. 151-153 How to cite?
Journal: Materials chemistry and physics 
Abstract: Potassium tantalite (KTaO3) nanocrystalline with octahedral morphologies were synthesized by hydrothermal route. The as-prepared samples have pyrochlore structures, which are consisted of a large quantity of octahedral nanocrystalline with a uniform edge size of about 500 nm. The band gap energy for KTaO3 nanocrystalline is about 4.06 eV. The Raman studies show that the vibration modes of nanocrystalline are red-shifted and broadened, which are due to defects of KTaO3 nanocrystalline and weak quantum confinement effect. PL study exhibits that a broad blue light emission band peaking at about 490 nm (2.53 eV) was observed at room temperature. Oxygen vacancies should be accounted for this emission peak.
URI: http://hdl.handle.net/10397/14223
ISSN: 0254-0584
EISSN: 1879-3312
DOI: 10.1016/j.matchemphys.2008.11.041
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