低温溶剂热法制备ZnO薄膜及性能研究

发布时间：2018-04-04 20:10

  本文选题：ZnO薄膜　切入点：缓冲层　出处：《燕山大学》2015年硕士论文

【摘要】：近年来,氧化锌(Zn O)薄膜由于材料廉价且丰富,化学稳定性和热稳定性好,无毒且有优异的光电性能而广受关注。目前,在众多Zn O薄膜的制备方法中,溶剂热法因其制备简便,设备要求低,反应温度低,形貌可控等优点而越来越受到人们的青睐。本文采用溶剂热法在有缓冲层的玻璃基底上生长Zn O薄膜,缓冲层原料用二水合乙酸锌作溶剂,乙醇胺作稳定剂,乙二醇甲醚作溶剂,生长前驱液以六水合硝酸锌作锌源,六次亚甲基四胺或尿素提供OH-根,考查生长时间、前驱液浓度和温度等反应参数对Zn O薄膜表面形貌及光学性能的影响,并优化最佳反应条件;同时在六次亚甲基四胺条件下,探索高温热处理的缓冲层(Ⅰ缓冲层)对Zn O薄膜形貌及性能的影响,证明低温下在各种柔性衬底上可制备出Zn O薄膜。尝试降低体系温度,用有机缓冲层替换Zn O缓冲层制备Zn O薄膜。样品通过X射线衍射仪(XRD)、荧光光谱仪、紫外-可见分光光度计(UV-Vis)、扫描电子显微镜(SEM)等测试手段进行表征。由实验结果可知,所得薄膜均为纤锌矿结构Zn O。六次亚甲基四胺体系下得到c轴择优生长的Zn O薄膜,生长时间为9 h,温度为90℃,前驱液浓度为0.065 mol/L是最佳的制备条件,此时结晶度最好,透过率也较大,形貌为六角纳米棒,长径比最大,达到16。同时成功在未高温热处理的缓冲层(Ⅱ缓冲层)上制备出Zn O薄膜,得到纳米片及纳米片堆叠成的棒状等结构。在柔性衬底上也制备出Zn O薄膜,形貌包括棒状、铅笔状、笔筒状和管状。在尿素体系下得到的Zn O为多孔纳米片状,样品的比表面积很大,甲基橙的光催化降解说明随着Zn O生长温度增加和前驱液浓度增大,降解率减小。
[Abstract]:In recent years, zinc oxide (ZnO) thin films have attracted much attention due to their cheap and abundant materials, good chemical stability and thermal stability, non-toxic and excellent optoelectronic properties.At present, solvothermal method is more and more popular among the preparation methods of Zno thin films because of its simple preparation, low equipment requirements, low reaction temperature, controllable morphology and so on.In this paper, ZnO thin films were grown on glass substrates with buffer layer by solvothermal method. The raw material of buffer layer was zinc acetate dihydrate as solvent, ethanolamine as stabilizer, ethylene glycol methyl ether as solvent, zinc nitrate hexahydrate as source, and zinc nitrate hexahydrate as source.The effects of reaction parameters such as growth time, precursor concentration and temperature on the surface morphology and optical properties of ZnO films were investigated, and the optimum reaction conditions were optimized.The effect of buffer layer (鈪，

本文编号：1711494