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THE EFFECT OF CONCENTRATION OF STRUCTURE AND OPTICAL PROPERTIES OF THIN FILMS SYNTHESIZED BY SOL-GEL METHODS SPIN COATING

机译:溶胶-凝胶法旋涂法制备的薄膜的结构浓度和光学性能的影响

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摘要

ZnO thin films have been successfully synthesized by the method of sol-gel spin coating and mixing processes reflux technique. Materials used Zinc acetate dehydrate Zn (CH3COOH)2 2H2O, isopropanol and diethanolamine (DEA) are respectively as base material, solvent and stabilizer. Zinc acetate dehydrate Zn (CH3COOH)2 2H2O with various concentration of 0.6 M; 0.7 M and 0.8 M dissolved by the solvent isopropanol was then stabilized with diethanolamine (DEA). The molar ratio between the DEA and ZnAc is 1: 1. ZnO thin films on a glass substrate made by spin-coating technique with a rotation speed of 5000 rpm, for 30 seconds and calcination performed by pre-heating temperature of 300oC and 500oC annealing temperature. The results of the characterization of ZnO thin films by XRD indicates all hexagonal shaped crystal structure and the small crystal size of 25.4 nm for a concentration of 0.6 M. The results of the characterization of ZnO thin films by UV-Vis showed the highest transmittance value of 59.0% for concentrations of 0.7 M and the value of the energy band gap of 3.13 eV smallest to the concentration of 0.8 M.
机译:通过溶胶-凝胶旋涂和混合工艺回流技术成功合成了ZnO薄膜。所使用的材料分别为醋酸锌脱水锌(CH3COOH)2 2H2O,异丙醇和二乙醇胺(DEA),分别作为基础材料,溶剂和稳定剂。乙酸锌使各种浓度的0.6 M的Zn(CH3COOH)2 2H2O脱水;然后用二乙醇胺(DEA)稳定被溶剂异丙醇溶解的0.7 M和0.8M。 DEA与ZnAc的摩尔比为1:1。通过旋涂技术在玻璃基板上以5,000 rpm的转速旋转ZnO薄膜30秒钟,并在300oC的预热温度和500oC的退火温度下进行煅烧温度。 XRD表征ZnO薄膜的结果表明,在浓度为0.6 M的条件下,晶体均为六边形晶体结构,晶体尺寸为25.4nm。UV-Vis表征ZnO薄膜的透射率最高对于0.7 M的浓度,其最小为59.0%,对于0.8 M的浓度,最小的能带隙值为3.13 eV。

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