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【期刊论文】Photoluminescence Properties of SnO2 Nanoparticles Synthesized by Sol-Gel Method
吕孟凯, Feng Gu, Shu Fen Wang, Meng Kai Lu, * Guang Jun Zhou, Dong Xu, and Duo Rong Yuan
J. Phys. Chem. B 2004, 108, 8119-8123,-0001,():
-1年11月30日
Nanocrystalline SnO2 particles have been synthesized by a simple sol-gel method. The structural and optical properties of these SnO2 particles are investigated using X-ray powder diffraction, transmission electron microscopy, UV-visible absorption, and photoluminescence spectroscopy. The oxygen-vacancies-related photoluminescence 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 holes in the Vo ** center. Experimental results reveal that increasing calcining temperature can decrease the oxygenvacanciesrelated luminescence intensity of the sample. After introducing Ce3+/Mn2+ ions into the host, the oxygenacancies-related luminescence has been enhanced remarkably resulting from the formation of many more oxygen vacancies. The dependence of the oxygen-vacancies-related luminescence intensity on the Ce3+/Mn2+ concentration is also discussed
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