Analysis of the optical properties of ZnO thin films deposited on a glass substrate by the So-gel method
DOI:
https://doi.org/10.21580/jnsmr.2022.8.1.9623Keywords:
ZnO precursor, photocatalyst, optical band gap, so-gel method, thin filmsAbstract
Zinc oxide (ZnO) has attracted the attention of researchers as a photocatalyst material, because ZnO has a wide direct band gap (3.37 eV) and is a semiconductor material with a large excitation binding energy (60 meV). ZnO is a photocatalyst that has many advantages, namely cheap, non-toxic, and theoretically very active under UV irradiation. The most interesting thing about ZnO semiconductor compared to other semiconductors is that ZnO can absorb most of the solar spectrum. However, there is a weakness of the ZnO semiconductor, namely the very fast recombination of charge carriers and the ZnO semiconductor has a low efficiency in the visible region which causes the ZnO semiconductor to have a wide band gap. that is the weakness of ZnO. it is necessary to choose the right method to overcome this deficiency of ZnO. one way that can be done is to increase the photocatalytic ability of zinc oxide, it is necessary to develop it in the manufacture of thin films. The method used in the manufacture of Thin Film is using the sol-gel spray coating method. the first stage is through the manufacture of ZnO precursors by dissolving zinc acetate dehydrate with isopropanol solvent through stirring. then the second stage by adding Monoethanolamine. This stirring lasted for 30 minutes at a temperature of 70°C, the precursor concentration was prepared with three different concentrations which included concentrations of 0.1, 0.3, and 0.5 M. ZnO precursor deposited on the substrate glass is blown at 400 °C. Optical properties are carried out by recording the transmittance and absorbance which are affected by increasing concentrations. The optical transmission spectra show that the transmission increases with decreasing concentration and the maximum transmission in the visible region is about 90% for ZnO thin films prepared with 0.1 M. The optical band gap value produced by the thin film of 0.1 M precursor concentration resulted in an energy band gap of 3.11 eV; thin films of 0.3 M precursor concentration produced an energy band gap of 3.07 eV; and thin film of 0.5M precursor concentration produced an energy band gap of 3.06 eV.
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References
A. K. Ambedkar et al., “Structural, optical and thermoelectric properties of Al-doped ZnO thin films prepared by spray pyrolysis,” Surfaces and Interfaces, vol. 19, no. March, p. 100504, 2020, doi: 10.1016/j.surfin.2020.100504.
B. Sundarakannan and M. Kottaisamy, “Synthesis and characterization of near UV excitable Y2O2S:Eu3+ entrapped ZnO for white light emitting diode applications,” J. Solid State Chem., vol. 293, no. July 2020, p. 121739, 2021, doi: 10.1016/j.jssc.2020.121739.
R. A. Picca et al., “Enhanced stability of organic field-effect transistor biosensors bearing electrosynthesized ZnO nanoparticles,” Sensors Actuators, B Chem., vol. 274, pp. 210–217, 2018, doi: 10.1016/j.snb.2018.07.128.
L. Cai et al., “Enhanced performance of the tangerines-like CuO-based gas sensor using ZnO nanowire arrays,” Mater. Sci. Semicond. Process., vol. 118, no. April, p. 105196, 2020, doi: 10.1016/j.mssp.2020.105196.
A. Echresh, M. Echresh, V. Khranovskyy, and O. Nur, “High photocurrent gain in NiO thin fi lm / M-doped ZnO nanorods ( M ¼ Ag , Cd and Ni ) heterojunction based ultraviolet photodiodes,” J. Lumin., vol. 178, pp. 324–330, 2016, doi: 10.1016/j.jlumin.2016.06.023.
Y. Zhang et al., “Improving performance of perovskite solar cells based on ZnO nanorods via rod-length control and sulfidation treatment,” Mater. Sci. Semicond. Process., vol. 117, no. May, p. 105205, 2020, doi: 10.1016/j.mssp.2020.105205.
M. Sangeeta et al., “Synthesis of ZnO, MgO and ZnO/MgO by Solution Combustion Method: Characterization and Photocatalytic Studies,” Mater. Today Proc., vol. 4, no. 11, pp. 11791–11798, 2017, doi: 10.1016/j.matpr.2017.09.096.
A. Abdel-Galil, M. S. A. Hussien, and I. S. Yahia, “Synthesis and optical analysis of nanostructured F-doped ZnO thin films by spray pyrolysis: Transparent electrode for photocatalytic applications,” Opt. Mater. (Amst)., vol. 114, no. October 2020, p. 110894, 2021, doi: 10.1016/j.optmat.2021.110894.
M. Karyaoui et al., “Some physical investigations on silver-doped ZnO sprayed thin films,” Mater. Sci. Semicond. Process., vol. 30, pp. 255–262, 2015, doi: 10.1016/j.mssp.2014.09.017.
T. Ma, “Effect of precursor concentration and sintering on functional properties of ZnO thin films deposited by aerosol-assisted chemical vapour deposition (AACVD),” Mater. Sci. Semicond. Process., vol. 121, no. July 2020, p. 105413, 2021, doi: 10.1016/j.mssp.2020.105413.
T. Tian et al., “Synthesis of large size ZnO microrods by a simple way of thermal evaporation,” Ceram. Int., vol. 41, no. S1, pp. S774–S778, 2015, doi: 10.1016/j.ceramint.2015.03.136.
E. Sener, O. Bayram, U. C. Hasar, and O. Simsek, “Structural and optical properties of RF sputtered ZnO thin films: Annealing effect,” Phys. B Condens. Matter, vol. 605, p. 412421, 2021, doi: 10.1016/j.physb.2020.412421.
A. Tiwari and P. P. Sahay, “Sn–Ga co-doping in sol-gel derived ZnO thin films: Studies of their microstructural, optical, luminescence and electrical properties,” Mater. Sci. Semicond. Process., vol. 118, no. April, p. 105178, 2020, doi: 10.1016/j.mssp.2020.105178.
Q. Fan, D. Li, J. Li, and C. Wang, “Structure and piezoelectricity properties of V-doped ZnO thin films fabricated by sol-gel method,” J. Alloys Compd., vol. 829, p. 154483, 2020, doi: 10.1016/j.jallcom.2020.154483.
E. T. Wahyuni, N. P. Diantariani, I. Kartini, and A. Kuncaka, “Enhancement of the photostability and visible photoactivity of ZnO photocatalyst used for reduction of Cr(VI) ions,” Results Eng., vol. 13, no. January, pp. 18–21, 2022, doi: 10.1016/j.rineng.2022.100351.
K. Ravichandran and E. Sindhuja, “Fabrication of cost effective g-C3N4+Ag activated ZnO photocatalyst in thin film form for enhanced visible light responsive dye degradation,” Mater. Chem. Phys., vol. 221, no. October 2017, pp. 203–215, 2019, doi: 10.1016/j.matchemphys.2018.09.038.
U. Chaitra, D. Kekuda, and K. M. Rao, “Dependence of solution molarity on structural, optical and electrical properties of spin coated ZnO thin films,” J. Mater. Sci. Mater. Electron., vol. 27, no. 7, pp. 7614–7621, 2016, doi: 10.1007/s10854-016-4745-5.
Z. Y. Alami, M. Salem, and M. Gaidi, “Effect of Zn Concentration On Structural and Optical Proprieties Of ZNO Thin Films Deposited By Spray Pyrolysis.,” Adv. Energy An Int. J., vol. 2, no. 4, pp. 11–24, 2015, doi: 10.5121/aeij.2015.2402.
A. Chanda et al., “Structural and optical properties of multilayered un-doped and
cobalt doped TiO2 thin films,” Appl. Surf. Sci., vol. 536, no. February 2020, p. 147830, 2021, doi: 10.1016/j.apsusc.2020.147830.
S. Benramache, O. Belahssen, A. Arif, and A. Guettaf, “A correlation for crystallite size of undoped ZnO thin film with the band gap energy - Precursor molarity - Substrate temperature,” Optik (Stuttg)., vol. 125, no. 3, pp. 1303–1306, 2014, doi: 10.1016/j.ijleo.2013.08.015.
C. H. Chao, C. H. Chan, J. J. Huang, L. S. Chang, and H. C. Shih, “Manipulated the band gap of 1D ZnO nano-rods array with controlled solution concentration and its application for DSSCs,” Curr. Appl. Phys., vol. 11, no. 1 SUPPL., pp. S136–S139, 2011, doi: 10.1016/j.cap.2010.11.056.
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