Effect of substrate surface on the wide bandgap SnO2 thin films grown by spin coating

被引:6
作者
Bitu, Md. Nur Amin [1 ,3 ]
Tanvir, Nazmul Islam [1 ,2 ,3 ]
Islam, Suravi [1 ,3 ]
Farhad, Syed Farid Uddin [1 ,2 ,3 ]
机构
[1] BCSIR Dhaka Labs, Ind Phys Div, Energy Convers & Storage Res Sect, Dhaka 1205, Bangladesh
[2] BCSIR, Cent Analyt & Res Facil CARF, Dhaka 1205, Bangladesh
[3] Bangladesh Council Sci & Ind Res BCSIR, Dhaka 1205, Bangladesh
关键词
X-RAY-DIFFRACTION; LAYER;
D O I
10.1557/s43580-023-00515-3
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Tin (IV) oxide (SnO2) sols have been synthesized from SnCl2 center dot 2H(2)O precursor solution by applying two different processing conditions. The prepared sols were then deposited on UV-Ozone-treated quartz and soda lime glass (SLG) substrates by spin coating. The as-synthesized film was soft baked at about 100 degrees C for 10 min. This process was repeated 5 times to get a compact film, followed by air annealing at 250 degrees C for 2 h. The pristine and annealed films were characterized by UV-Vis-NIR spectroscopy, Grazing Incident X-Ray Diffraction (GIXRD), and Field Emission Scanning Electron Microscope (FESEM). The effect of the substrate surface was investigated by measuring the contact angles with De-Ionized (DI) water. UV-Ozone treatment of substrate provides a cleaner surface to grow a homogeneous film. The electrical resistivity of annealed thin films was carried out by a four-point collinear probe employing the current reversal technique and found in the range of similar to 2 x 10(3) to 3 x 10(3) Omega.cm. Film thickness was found in the range of similar to 137-285 nm, measured by a stylus profilometer. UV-Vis-NIR transmission data revealed that all the thin-film samples showed maximum (82-89) % transmission in the visible range. The optical bandgap of the thin films was estimated to be similar to 3.75-4.00 eV and similar to 3.78-4.35 eV for the films grown on SLG and quartz substrates, respectively.
引用
收藏
页码:194 / 200
页数:7
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