Cu2+掺杂ZnAl2O4纳米颗粒的光学性能  

Optical Properties of Cu2+ Doped ZnAl2O4 Nanoparticles

作　　者：黄尚攀 魏智强[1,2] 武晓娟[1,2] 陈秀娟[1,3] 元丽华[2] HUANG Shang-pan;WEI Zhi-qiang;WU Xiao-juan;CHEN Xiu-juan;YUAN Li-hua(State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China;School of Science,Lanzhou University of Technology,Lanzhou 730050,China;School of Mechanical and Electrical Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050 [2]兰州理工大学理学院,甘肃兰州730050 [3]兰州理工大学机电工程学院,甘肃兰州730050

出　　处：《发光学报》2019年第11期1386-1393,共8页Chinese Journal of Luminescence

基　　金：国家自然科学基金(51261015);甘肃省自然科学基金(1308RJZA238);兰州理工大学红柳一流学科建设计划资助项目~~

摘　　要：采用水热法和热处理技术制备了不同掺杂比例的Zn1-xCuxAl2O4(x=0,0.05,0.10,0.15,0.20)纳米颗粒,通过X射线衍射(XRD)、场发射透射电子显微镜(FETEM)、傅里叶红外光谱(FT-IR)、X射线光电子能谱(XPS)、光致发光光谱(PL)和紫外可见光谱(UV-Vis)对样品的晶体结构、形貌、元素分布、结合能和光学性能进行表征,并通过第一性原理计算得到了ZnAl2O4结构中存在的各种缺陷的能带结构。实验结果表明本方法制备的Zn1-xCuxAl2O4纳米颗粒为尖晶石结构,XPS能谱说明Zn0.9Cu0.10Al2O4样品中Cu^2+全部占据了四面体位置,PL光谱显示Cu^2+掺杂的样品出现了猝灭现象,紫外光谱表明Cu^2+掺杂后样品出现了新的吸收峰。并结合第一性原理计算对样品的光学性质给出了合理解释。Zn1-xCuxAl2O4(x=0,0.05,0.10,0.15,0.20)nanoparticles with different doping ratios were synthesized by hydrothermal method and heat treatment technology.The crystal structure,morphology,element distribution,binding energy and optical property of the samples were characterized by X-ray diffraction(XRD),field emission transmission electron microscopy(FETEM),Fourier infrared spectrum(FT-IR),X-ray photoelectron spectroscopy(XPS),photoluminescence(PL)and UV-Vis spectroscopy(UV-Vis),and the energy band structure of various defects in ZnAl2O4 structure was calculated by means of the first-principle calculations.The experimental results show that Zn1-xCuxAl2O4 nanoparticles prepared by this method possess spinel structure.The XPS spectra demonstrate that the doped Cu^2+all occupy the tetrahedral sites for Zn0.9Cu0.10Al2O4 samples,the PL spectra show luminescence quenching occurs for Cu^2+doped samples,the UV-Vis result shows the new absorption peak appeared after Cu^2+doped,and the optical properties of the sample are explained by the first principle calculations.

关 键 词：掺杂 ZNAL2O4 第一性原理计算 光学性能 

分 类 号：O482.31[理学—固体物理]