标题：Photoluminescence Properties of SnO_2 Nanoparticles Synthesized by Sol-Gel Method
作者：Feng Gu;Shu Fen Wang;Meng Kai Lu
作者机构：[Gu, F] Stt. Key Lab. of Crystal Materials, Shandong University, Jinan 250100, China;[ Wang, S.F] Stt. Key Lab. of Crystal Materials, Shandong Univers 更多
通讯作者地址：[Lu, MK]Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China.
来源：The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical
摘要：Nanocrystalline SnO_2 particles have been synthesized by a simple sol-gel method.The structural and optical properties of these SnO_2 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 SnO_2 nanoparticles was systematically investigated.The origin of the luminescence is assigned to the recombination of electrons in a conduction band with holes in the V~ center.Experimental results reveal that increasing calcining temperature can decrease the oxygen-vacancies-related luminescence intensity of the sample.After introducing Ce~(3+)/Mn~(2+) ions into the host,the oxygen-vacancies-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 Ce~(3+)/ Mn~(2+) concentration is also discussed.