ZnO:Sb^(3+)纳米粉的制备及发光性能的研究

Preparation and photoluminescence properties of Sb^(3+)-doped ZnO nanophosphors

采用共沉淀法制备了六方纤锌矿结构的Sb3+掺杂ZnO纳米荧光粉,并系统研究了不同Sb3+掺杂浓度、不同煅烧温度和时间对其发光性能的影响。借助于XRD、SEM、荧光光度计等测试手段对粉体的相组成、形貌及其光致发光性能进行了表征。结果表明:掺杂Sb3+样品的粒度小于未掺杂样品的粒度,当Sb3+掺杂浓度小于3%时,ZnO:Sb3+样品均具有纯相的六方纤锌矿结构;掺入Sb3+时会引起ZnO晶体发光强度的改变,当Sb3+掺杂浓度为2%、600℃煅烧4 h时,纳米粉具有较强的发射强度,两个主峰中心位置分别在450nm和510nm附近。

Sb3＋-doped ZnO nanopowders with hexagonal wurtzite phase were successfully prepared by a coprecipitation method.The effects of Sb3＋ doping concentration,calcination temperature and duration on the structural as well as photoluminescent properties of the ZnO：Sb3＋ nanopowders were systematically investigated.XRD,SEM and photoluminescence spectrophotometer were employed to characterize the crystal phase,particle size and photoluminescence of the as-prepared Sb3＋ doped zinc oxide nanopowders.The results showed that the particle size of the Sb3＋ doped ZnO nanophospors was smaller than that of the pristine ones.Single hexagonal wurtzite phase ZnO：Sb3＋ nanophosphors were obtained when the doping concentration of Sb3＋ was smaller than 3%.The as-prepared ZnO：Sb3＋ nanophosphors demonstrated the most intensive PL emission intensity near 450nm and 510nm positions when the Sb3＋ doping content was approach 2%,the calcination temperature and time were fixed at 600℃ and 4 hours,respectively.