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Study on the Structure and Luminescence Properties of Sm3+- doped SiO2 Glass Derived from a Sol- gel Process
Wang Xigui1, Wu Hongying1, Xie Datao2, Weng Shifu2, Wu Jinguang2
1.Department of Chemistry, Inner Mongolia Normal University, Huhehot 010022;2.College of Chemistry and Molecular Engineering, Peking University, State Key Laboratory of Rare Earth Materials Chemistry and Application, Beijing 100871
Abstract:
Under different annealing temperature, Sm3+-doped SiO2gel and glass were prepared by sol-gel method and three-dimensional fluorescence spectra, excitation spectra and emission spectra of Sm3+in SiO2glass were measured. The results showed that the optimum excitation wavelength is 360nm, the strongest emission wavelength is 610nm, the excitation peak position are at 364, 393, 464nm, the emission peak position are at 578, 591, 595, 610, 732nm, which caused from, respectively,4G5/2—6H5/2,4G5/2—6H7/2,4G5/2—6H11/2transition of Sm3+. The effect of the Sm3+concentration on the emission intensity has been discussed, and the emission intensity of Sm3+became the stronger with increasing the doping concentration. The concentration quenching will occur when concentration of Sm3+exceeds 1.15%.
Key words:  Rare earths, Sol-gel method, Sm3+-doped SiO2glasses
FundProject:国家重点基础研究发展规划项目(G1998061311)资助项目,内蒙古自治区科委重大研究项目资助课题,内蒙古师范大学和北京大学合作项目
溶胶-凝胶法制备掺Sm3+的SiO2玻璃的结构及发光性能
王喜贵1, 吴红英1, 谢大弿2, 翁诗甫2, 吴瑾光2
1.内蒙古师范大学化学系,呼和浩特 010022;2.北京大学化学与分子工程学院,稀土材料化学及应用国家重点实验室,北京 100871
摘要:
利用溶胶-凝胶技术制备了掺不同量Sm3+和不同退火温度下的SiO2凝胶和玻璃,通过三维荧光光谱、激发光谱、发射光谱的测试,确定了Sm3+在SiO2凝胶玻璃中的最佳激发波长为360nm,最强发射波长为610nm,激发光谱的峰位置在360、393、464nm处,发射光谱的峰位置在578、591、595、610、732nm处,分别归属于4G5/2-6H5/2、4G5/2-6H7/2、4G5/2-6H11/2跃迁,并证明当掺杂量达到1.15%时,Sm3+的发光最强,当Sm3+的掺杂量超过1.15%时,发生浓度猝灭
关键词:  稀土  溶胶-凝胶法  掺Sm3+的SiO2玻璃
DOI:10.1088/1674-0068/14/3/330-334
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