| Abstract
| - Nanocrystalline SnO2 particles have been synthesized by a simple sol−gel method. The structural and opticalproperties of these SnO2 particles are investigated using X-ray powder diffraction, transmission electronmicroscopy, UV−visible absorption, and photoluminescence spectroscopy. The oxygen-vacancies-relatedphotoluminescence of pure, cerium-, and manganese-doped SnO2 nanoparticles was systematically investigated.The origin of the luminescence is assigned to the recombination of electrons in a conduction band with holesin thecenter. Experimental results reveal that increasing calcining temperature can decrease the oxygen-vacancies-related luminescence intensity of the sample. After introducing Ce3+/Mn2+ ions into the host, theoxygen-vacancies-related luminescence has been enhanced remarkably resulting from the formation of manymore oxygen vacancies. The dependence of the oxygen-vacancies-related luminescence intensity on the Ce3+/Mn2+ concentration is also discussed.
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