Effects of lanthanum and sodium on the structural, optical and hydrophilic properties of sol-gel derived ZnO films: A comparative study

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• 作者：Mohamed Shaban^a ; A.M. El Sayed^b ; ^c ; ^{ams06@fayoum.edu.eg" class="auth_mail" title="E-mail the corresponding author} ; ^{adel_sayed_2020@yahoo.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：ZnO films ; Wettability ; Wrinkle nanostructure ; Refractive index
• 刊名：Materials Science in Semiconductor Processing
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：41
• 期：Complete
• 页码：323-334
• 全文大小：5869 K

文摘

The technological applications of the transparent ZnO films could be broadened via incorporation of small amounts of some special elements. In this work, the optical and surface properties of the spin coated Zn_1−xM_xO films (M=Na or La and x≤0.075) grown on glass substrates, are reported. According to X-ray diffraction (XRD) results, all films consist of a single phase with a hexagonal structure and the ZnO crystallites are preferentially oriented towards (002) direction. The plane surface of the pure ZnO film turned to be wrinkle network structure after Na and La addition. The reflectance (R%) of the films decreased after Na doping and significantly increased with increasing La content. The optical band gap of pure ZnO is 3.26 eV and red-shifted after Na and La incorporation. The dependence of the refractive index and film's wettability on the structural and morphological changes are reported. The obtained results of these two systems are compared with those of similar materials and some expected applications are explored.