Na_xMg_(0.2)Zn_(0.8-x)O纳米薄膜的光学性能
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摘要
采用溶胶-凝胶法在玻璃衬底上以二水乙酸锌(C_4H_6O_4Zn·2H_2O)、乙酸镁(C_4H_(14)-MgO_8)、氯化钠(NaCl)为前驱体制备Na_xMg_(0.2)Zn_(0.8-x)O纳米薄膜,借助扫描电子显微镜(SEM)、X射线衍射仪(XRD)、喇曼光谱及光致发光谱(PL)等手段,对Na_xMg_(0.2)Zn_(0.8-x)O薄膜的晶格结构、表面形貌及光学性能进行表征及分析,研究了Na~+不同掺杂浓度对Na_xMg_(0.2)-Zn_(0.8-x)O薄膜的结构及光学性能的影响。研究结果表明,所有样品均为六方纤锌矿结构;Na~+的掺入弥补了MgZnO薄膜本身存在的晶格缺陷,颗粒分布均匀且紧密,晶粒尺寸增大;当x在0～0.04内,x为0.02时,Na_(0.02)Mg_(0.2)Zn_(0.78)O薄膜的结晶性能更加优秀,且缺陷减少,光致发光性能达到最佳。
Na_xMg_(0.2)Zn_(0.8-x)O nano thin films were prepared on the glass substrate by the sol-gel method with zinc acetate dihydrate(C_4H_6O_4Zn·2H_2O),magnesium acetate(C_4H_(14)MgO_8)and sodium chloride(NaCl)as precursors.The crystal structure,surface morphology and optical properties of the Na_xMg_(0.2)Zn_(0.8-x)O nano thin films were characterized and analyzed by the scanning electron microscope(SEM),X-ray diffractometer(XRD),Raman spectra and photoluminescence(PL)spectra.The effects of Na+with different doping concentrations on the structure and optical properties of the Na_xMg_(0.2)Zn_(0.8-x)O thin films were studied.The research results show that all samples are hexagonal wurtzite structure;the addition of Na+makes up for the intrinsic lattice defects of MgZnO thin films.The distribution of particles is uniform and compact,and the grain size increases;when xis in the range of 0-0.04 and xis 0.02,the crystallization performance of the Na_(0.02)Mg_(0.2)Zn_(0.78)O thin films is better,the defects reduce,and the photoluminescence performance is the best.
Na_xMg_(0.2)Zn_(0.8-x)O nano thin films were prepared on the glass substrate by the sol-gel method with zinc acetate dihydrate(C_4H_6O_4Zn·2H_2O),magnesium acetate(C_4H_(14)MgO_8)and sodium chloride(NaCl)as precursors.The crystal structure,surface morphology and optical properties of the Na_xMg_(0.2)Zn_(0.8-x)O nano thin films were characterized and analyzed by the scanning electron microscope(SEM),X-ray diffractometer(XRD),Raman spectra and photoluminescence(PL)spectra.The effects of Na+with different doping concentrations on the structure and optical properties of the Na_xMg_(0.2)Zn_(0.8-x)O thin films were studied.The research results show that all samples are hexagonal wurtzite structure;the addition of Na+makes up for the intrinsic lattice defects of MgZnO thin films.The distribution of particles is uniform and compact,and the grain size increases;when xis in the range of 0-0.04 and xis 0.02,the crystallization performance of the Na_(0.02)Mg_(0.2)Zn_(0.78)O thin films is better,the defects reduce,and the photoluminescence performance is the best.
引文
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[3]WANG J,CHEN R,XIANG L,et al.Synthesis,properties and applications of ZnO nanomaterials with oxygen vacancies:a review[J].Ceramics International,2018,44(7):7357-7377.
[4]MANZHI P,KUMARI R,ALAM M B,et al.Mg-doped ZnOnanostructures for efficient organic light emitting diode[EB/OL].(2018-10-13)[2019-04-08].https://www.sciencedirect.com/science/article/abs/pii/S0042207X18308467.
[5]KORSUNSKA N,BORKOVSKA L,POLISCHUK Y,et al.Photoluminescence,conductivity and structural study of terbium doped ZnO films grown on different substrates[J].Materials Science in Semiconductor Processing,2019,94:51-56.
[6]丁铮,关钧,端木庆铎.沉积温度及热处理对AZO纳米叠层薄膜性能的影响[J].微纳电子技术,2019,56(2):140-144.
[7]OHTOMO A,KAWASAKI M,KOIDA T,et al.MgxZn1-xOas aⅡ-Ⅵwidegap semiconductor alloy[J].Applied Physics Letters,1998,72(19):2466-2468.
[8]KUMAR N,SRIVASTAVA A.Green photoluminescence and photoconductivity from screen-printed Mg doped ZnO films[J].Journal of Alloys and Compounds,2018,735:312-318.
[9]AKCAN D,GUNGOR A,ARDA L.Structural and optical properties of Na-doped ZnO films[J].Journal of Molecular Structure,2018,1161:299-305.
[10]魏美玲,闫法强,丁彦霞,等.溶胶凝胶工艺制备超亲水耐污秽易清洁涂层的研究[J].硅酸盐通报,2017,36(12):4173-4177.
[11]王怡,李合增,李东临,等.射频磁控溅射法ZnO薄膜制备工艺的优化[J].真空,2015,52(4):55-59.
[12]于琦,姜立运,艾桃桃.制备与合成ZnO纳米材料方法分析[J].科技创新与应用,2016(21):83.
[13]MUSTAFA L,ANJUM S,WASEEM S,et al.Structural and optical properties of ZnO co-doped with Co and Ni thin films deposited by pulse laser deposition technique[J].Optik,2018,161:54-63.
[14]WANG L W,WU F,TIAN D X,et al.Effects of Na content on structural and optical properties of Na-doped ZnO thin films prepared by sol-gel method[J].Journal of Alloys and Compounds,2015,623:367-373.
[15]SIBARI A,MARJAOUI A,LAKHAL M,et al.Phosphorene as a promising anode material for(Li/Na/Mg)-ion batteries:a first-principle study[J].Solar Energy Materials and Solar Cells,2018,180:253-257.
[16]FOUDA A N,SHAZLY M,EID E A.Ultra-smooth and lattice relaxed ZnO thin films[J].Superlattices and Microstructures,2014,73:268-274.
[17]ZHENG Z,LU Y F,YE Z Z,et al.Carrier type-and concentration-dependent absorption and photoluminescence of ZnOfilms doped with different Na contents[J].Materials Science in Semiconductor Processing,2013,16(3):647-651.