摘要
采用水热法制备了不同含量的铝(Al)单元掺杂及铝(Al)、钼(Mo)共掺杂氧化锌(AZO、AZMO)纳米粉体,利用X射线衍射(XRD)、扫描电镜(SEM)、高分辨透射电镜(HRTEM)、荧光分光光度计(PL)、紫外分光光度计(UV-vis)、TG-DTA差热分析、激光粒度分析仪、四探针电阻测试仪等测试手段,探究了Al单元掺杂和Al、Mo共掺对AZO、AZMO粉体结构、形貌及光电性能的影响。结果表明:所制备的AZO和AZMO纳米粉体为结晶度良好的六方纤锌矿结构。Al、Mo掺杂浓度影响纳米氧化锌粉体形貌、晶体结构及光电性能。随着Al、Mo掺杂浓度的增加,粉体的结晶质量降低,晶粒尺寸先减小后增大,光电性能先变好后变差。适度的Al、Mo共掺杂可使氧化锌禁带宽度和电阻率达到最优匹配,改善氧化锌的近紫外发光和蓝色发光特性。在掺杂浓度为m(Al)∶m(Mo)=1∶3时,纳米粉体的综合光电性能最佳,禁带宽度为3.392 eV,电阻率为20.3Ω·m,紫外发光峰强度最大,且出现了蓝移。
A luminum(Al)doped,Al and molybdenum(Mo)co-doped zinc oxide(AZO,AZMO)nanometer powders were prepared via hydrothermal method.The effects of single Al doping and Al-Mo co-doping on the structure,morphology and photoelectric properties of AZO,AZMO powders were cha-racterized and analyzed by using X-ray diffractometer(XRD),scanning electron microscope(SEM),high resolution transmission electron microscope(TEM),fluorescence spectrophotometer(PL),ultraviolet spectrophotometer,TG-DTA differential thermal analysis,laser particle size analyzer,and four-probe resistance tester.The results show that both of AZO and AZMO nanometer powders are hexaploid wurtzite structure with good crystallinity.The doping concentration of Al and Mo has an impact on the morphology,crystal structure and photoelectric pro-perties of nano-sized zinc oxide powder.As the doping concentration increases,the degree of crystallinity decreases,and the grain size decreases first and then increases.Photoelectric performance rises first and then drops with the increase of doping concentration.The appropriate co-doping concentration of Al and Mo can achieve the optimal match of band gap width and resistivity as well as the improvement of the near ultraviolet and blue luminescence properties.When the ration of the doping concentration for m(Al)∶m(Mo)is 1∶3,the best comprehensive photoelectric properties of nanometer AZMO powders can be obtained with the forbidden band width of 3.392 eV and the resistivity of 20.3Ω·m.The ultraviolet luminescence peak intensity is the highest and appears blue shift.
作者
王南南
李继文
刘伟
李武会
张玉栋
雷金坤
徐流杰
WANG Nannan;LI Jiwen;LIU Wei;LI Wuhui;ZHANG Yudong;LEI Jinkun;XU Liujie(School of Material Science and Engineering,Henan University of Science and Technology,Luoyang 471023,Henan,China;National Joint Collaborative Innovation Center for Nonferrous Metal New Materials and Advanced Processing Technology,Luoyang 471023,Henan,China;National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials,Luoyang 471003,Henan,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2022年第4期25-31,共7页
Materials Reports
基金
国家自然科学基金(U1804124)。
关键词
水热法
铝钼共掺杂
纳米氧化锌
禁带宽度
光致发光
电阻率
hydrothermal method
Al and Mo co-doping
nanometer zinc oxide
band gap width
photoluminescence
resistivity
