Cu掺杂TiO_2纳米晶粉体的形态及光电性能研究  

Study on Morphology and Photoelectric Properties of Cu-doped TiO_2 Nanocrystalline Powders

作　　者：邓亚丰 马战红[1,2] 明晓丽 任凤章 

机构地区：[1]河南科技大学材料科学与工程学院 [2]河南省有色金属材料科学与加工技术重点实验室,河南洛阳471023 [3]有色金属共性技术河南省协同创新中心

出　　处：《半导体光电》2018年第4期533-537,共5页Semiconductor Optoelectronics

基　　金：河南省国际科技合作计划项目(152102410035);河南省科技创新人才计划项目(144200510001)

摘　　要：TiO_2纳米材料良好的光电性能,为其作为制备染料敏化太阳电池等新型太阳电池的光阳极材料提供了很好的应用基础。采用溶胶-凝胶法成功制备了Cu掺杂的TiO_2纳米晶粉体,并利用XRD、EDS、TEM以及荧光分光光度计对样品进行了表征,研究了Cu掺杂对TiO_2的物相类型、微观结构、晶粒尺寸以及光致发光性能的影响。结果表明,Cu掺杂使Cu2+取代Ti 4+进入TiO_2的晶格中,在抑制TiO_2晶粒生长的同时促进了TiO_2的晶型转变,但这种抑制和促进作用会随着Cu掺杂量的增加而减弱。3%(原子分数)的Cu掺杂能够有效增强TiO_2对光生电子的捕获能力,降低光生电子的复合速率,优化其光电性能。The good photoelectric properties of TiO2 nanomaterials provide a good basis for its applications as a photoanode material for new solar cells such as dye-sensitized solar cells.In this paper,Cu-doped TiO2 nanocrystalline powders were successfully prepared by sol-gel method.The samples were characterized by XRD,EDS,TEM and fluorescence spectrophotometer.The effects of Cu doping on the phase type,microstructure,grain size and PL properties of TiO2 powders were investigated.The results show that Cu doping leads Cu^2＋to replace Ti^4＋into the crystal lattice of TiO2 and inhibits the growth of TiO2 crystal and promotes the crystal transition of TiO2,but this inhibition and promotion function will be weakened with the increase of Cu doping amount.3%（atomic fraction）Cu doping can effectively enhance the capture ability of TiO2 to photoelectrons,reduce the recombination rate of photoelectrons and improve its photoelectric properties.

关 键 词：TIO2纳米晶 CU掺杂 溶胶-凝胶 晶型转变 光生电子 

分 类 号：O472.3[理学—半导体物理]