Sm^(3+)掺杂SnO_2半导体的制备及其光学特性  

Preparation and Optical Properties of Sm^(3+)-doped Tin Oxide Semiconductor

作　　者：吴连超[1] 倪亚茹[1] 陆春华[1] 许仲梓[1] 

机构地区：[1]南京工业大学材料学院,南京210009

出　　处：《科技通报》2011年第3期394-397,共4页Bulletin of Science and Technology

基　　金：国家自然科学基金项目资助(20901040/B0111);江苏省创新学者攀登项目(SBK200910148);十一五预研项目(51310060304);江苏省自然科学基金项目(BK2010553)

摘　　要：以四氯化锡(SnCl4.5H2O)、氧化钐(Sm2O3)和乙醇为主要原料,采用溶剂热法制备Sm3+离子掺杂的SnO2纳米粉体。应用XRD、FT-IR、紫外-可见漫反射光谱(UV-Vis DRS)等手段对所获得粉体进行了表征。结果表明,溶剂热过程实现了氧化锡的直接晶化,产物为金红石结构。Sm3+离子进入SnO2晶格形成固溶体,随着Sm3+添加量的增大,样品的晶粒减小。对Sm3+离子掺杂二氧化锡纳米粉的紫外可见光谱研究结果表明,Sm3+离子掺杂使得SnO2粉体的吸收带边发生红移,而随着Sm3+进入SnO2晶格量的增大,产物的禁带宽度减小。Sm3＋-doped SnO2 nanoparticles were directly synthesized by solvothermal method,using SnCl4·5H2O,Sm2O3 and alcohol.The products were characterized with X-ray powder diffraction（XRD）,Fourier-transform infrared（FT-IR） spectrophotometry,and ultraviolet-visible diffuse reflectance spectra（UV-Vis DRS）.It was found that rutile phase was directly synthesized without calcination.The doped Sm3＋ can be decreased the crystalline size of SnO2 powder remarkably.As indicate by the results,the optical absorption edge of the UV spectrum is red shift when the Sm3＋ doped SnO2.The increased Sm3＋ in the SnO2 lattice can enhance its band gap.

关 键 词：氧化物半导体 SNO2 溶剂热法 钐离子 

分 类 号：TN304.21[电子电信—物理电子学]