Impact of Post- Deposition Heat Treatment on the Morphology and Optical Properties of Zinc Oxide (ZnO) Thin Film Prepared by Spin-Coating Technique
Journal of Photonic Materials and Technology
Volume 3, Issue 3, May 2017, Pages: 20-28
Received: Nov. 19, 2017;
Accepted: Dec. 4, 2017;
Published: Dec. 26, 2017
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Sunday Wilson Balogun, Department of Physics and Materials Science, Kwara State University Malete, Ilorin, Nigeria
Yekini Kolawole Sanusi, Department of Physics and Materials Science, Kwara State University Malete, Ilorin, Nigeria; Department of Pure and Applied Physics, Ladoke Akintola University of Technology, Ogbomoso, Nigeria
Adebayo Olaniyi Aina, Department of Physics and Materials Science, Kwara State University Malete, Ilorin, Nigeria
This research work examines the structural and optical properties of ZnO thin films. Deposition were done by spin coating of solution of Zinc oxide onto pre-cleaned glass substrate at 4000 rpm for 30 sec using spin-coater under ambient condition at room temperature in order to form desired thickness of the film on the substrate. Post- deposition thermal annealing at different range of temperatures from 150°C to 600°C with steps of 50°C was carried out on the samples. The impact of thermal annealing on optical properties of the deposited thin film was investigated using UV-VIS spectrophotometer and scanning Electron Microscope for the morphology. The optical transmittance, reflectance, absorbance were recorded which was used to evaluate the optical band gap of Zinc oxide. Observation shows that band gap energy reduces as annealing temperature is increased from 150°C to 600°C. Observation made on the morphology using SEM model ASPEX 3020 showed that as the temperature increases the surface of the sample roughness increases. It was deduced that as the annealing temperature is increased the surface roughness increases. This may be due to increase in grain size with increase in annealing temperature. The band gap energy decreases as the annealing temperature increases.
Sunday Wilson Balogun,
Yekini Kolawole Sanusi,
Adebayo Olaniyi Aina,
Impact of Post- Deposition Heat Treatment on the Morphology and Optical Properties of Zinc Oxide (ZnO) Thin Film Prepared by Spin-Coating Technique, Journal of Photonic Materials and Technology.
Vol. 3, No. 3,
2017, pp. 20-28.
M. Hadis, O. Umit Zno Oxide Fundamental, Materials and Device Technology (Weinheim: WILLY-VCH Verlag GmbH& Co. 2009).
S. Sanjeev, D. Kekuda 2015 Effect of Annealing Temperature on the Structural and Optical Properties of Zinc Oxide (ZnO) Thin Films Prepared by Spin Coating Process IOP Conf. Ser.: Mater. Sci. Eng. 73 012149.
S. Yusan, A. Bampaiti, S. Aytas, S. Erenturk, M. A. A Aslani - Synthesis and structural properties of ZnO and diatomite-supported ZnO nanostructures. Ceram Int. 2016; 42: 2158–2163.
A. F. Aktaruzzaman, G. L. Shaaarm, L. K. Mahgotra: Thin solid Films, 198 (1991), pp 67-74.
K. G. Kanade, B. B. Kale, R. C. Aiyer, B. K. Das Effect of solvents on the synthesis of nano-size zinc oxide and its properties. Mater Res Bull. 2006; 41: 590-600.
M. Sabbaghan, A. S Shahvelayati, S. E Bashtani Synthesis and optical properties of ZnO nanostructures in imidazolium-based ionic liquids. Solid State Sci. 2012: 14: 1191-1195.
E. Darezereshki, M. Alizadeh, F. Bakhtiari, M. Schaffie A novel thermal decomposition method for the synthesis of ZnO nanoparticles from low concentration ZnSO4 solutions. Appl Clay Sci. 2011: 54: 107-111.
H. Wang, C. Li, H. Zhao, R Li, J. Liu Synthesis, characterization, and electrical conductivity of ZnO with different morphologies. Powder Technol. 2013; 239: 266-271.
W. L Suchanek Systematic study of hydrothermal crystallization of zinc oxide (ZnO) nano-sized powders with superior UV attenuation. J Cryst Growth. 2009; 312: 100-108.
A. Kołodziejczak-Radzimska, T. Jesionowski. Zinc Oxide-From Synthesis to Application: A Review. Materials 2014; 7: 2833-2881.
C. C. Chen, P. Liu, C. H Lu Synthesis and Characterization of nano-sized ZnO powders by direct precipitation method. Chem Eng J. 2008; 144: 509–513.
O. Lupan, L. Chow, G. Chai, B. Roldan, A. Naitabdi Nanofabrication and characterization of ZnO nanorod arrays and branched microrods by aqueous solution route and rapid thermal processing. Mater Sci Eng B. 2007; 145: 57-66.
C. Ravichandran, G. Srinivasan, C. Lenno Investigations on the structural and optical properties of Li, N and (Li, N) co-doped ZnO thin films prepared by sol-gel technique. Mater Sci Semicond Process. 2010; 13: 46-50.
N. Brihi, Z. Takkouk, A. Bouaine Laser annealing effects on the structural, optical and magnetic properties of sputtered Zn0.95Co0.05O thin film. Mater Sci Eng B. 2007; 145: 6-10.
M. A Gondal, AM Ilyas, T. A Fasasi, M. A Dastageer Synthesis of green TiO2/ZnO/CdS hybrid nano-catalyst for efficient light harvesting using an elegant pulsed laser ablation in liquids method. Appl Surf Sci. 2015; 357: 2217-2222.
R. M Mohamed, D. McKinney, M. W Kadi, I. A Mkhalid Cobalt/zinc oxide hollow spheres: Visible light nanophotocatalysts. Ceram Int. 2016; 42: 2299-2305.
S. He, X. Zou, Z. Sun, G. Teng Influence of precursor solution’s concentration on double-layer ZnO structure and solar cell's performance. Mater Lett. 2013; 91: 258-260.
E. M Flores, C. W Raubach, R. Gouvea, E. Longo, S. Cava Optical and structural investigation of ZnO@ZnS core–shell nanostructures. Mater Chem Phys. 2016; 173: 347-354.
K. Nejati, Z. Rezvani, R. Pakizevand Synthesis of ZnO Nanoparticles and Investigation of the Ionic Template Effect on Their Size and Shape. Int Nano Lett. 2011; 1: 75-81.
G. Nagaraju, S. Ashoka, P. Chithaiah, C. N Tharamani Surfactant free hydrothermally derived ZnO nanowires, nanorods, microrods and their characterization. Mater Sci Semicond Process. 2010; 13: 21-28.
H. S Goh, R. Adnan, M. A Farrukh ZnO nanoflake arrays prepared via anodization and their performance in the photodegradation of methyl orange. Turkish J Chem. 2011; 35: 375-391.
M. Zareie, A. Gholami, M. Bahrami, A. H Rezaei A simple method for preparation of micro-sized ZnO flakes. Mater Lett. 2013; 91: 255-257. e-ISSN: 2319-9849 p-ISSN: 2322-0049RRJCHEM | Volume 5 | Issue 2 | July, 2016.
B. Kumar, K. Smita, L. Cumbal, A. Debut, R. N. Pathak Ionic Liquid Based Silica Tuned Silver Nanoparticles: Novel Approach for Fabrication. Synth Reac Inorganic Met Nano-Metal Chem. 2016; 46: 1265–1271.
T. Kawano, H. Imai. A simple preparation technique for shape-controlled zinc oxide nanoparticles: Formation of narrow size-distributed nanorods using seeds in aqueous solutions. Coll Surf A: Physicochem Eng Asp. 2008; 319: 130-135.
Y. Matsushima, M. Matsumoto, K. Maeda, T. Suzuki Photoluminescence and electroluminescence of ZnO: Zn layers prepared by a chemical vapor deposition method with ethanol addition. Mater Sci Eng B. 2007; 145: 1-5.
R. B. Kale Morphological evolution of hydrothermally derived ZnO nano and microstructures. Opt-Int J Light Electron Opt. 2016; 127: 4621-4624.
Y. Li, G. Li, S. Wang, H. Gao, Z. Tan Preparation and characterization of nano-ZnO flakes prepared by reactive ion exchange method. J Therm Anal Calorim. 2009; 95: 671-674.
S. Al-Heniti, A. Umar, P. Singh, A. Sayari, A. Al-Hajry Nanocrystalline ZnO flakes for photovoltaic device applications. Adv Sci Lett. 2010; 3: 543-547.
A. K. Zak, W. H. A Majid, M. E Abrishami, R. Yousefi X-ray analysis of ZnO nanoparticles by Williamson-Hall and size-strain plot methods. Solid State Sci. 2011; 13: 251-256.
S. ILican, Y. Caglar, M. Caglar, Preparation and characterization of ZnO thin films deposited by sol-gel spin coating method. Journal of Optoelectronics and advanced Materials 2008 Vol. 10, No. 10. 2578 – 2583.
I. K Kumar, P. R. Balachandraand Synthesis and characterization of nano zinc oxide by gel spin coating. Recent Research in Science and Technology 2011, 3 (3): 48-52.
Shakti, Nanda, P. S. Gupta, Structural and Optical Properties of Sol-gel Prepared ZnO Thin Film. Applied Physics Research 2010 Vol. 2, No. 1. 19-28.
J. Tauc, 1970. The optical properties of solids (North-Holland, Amsterdam, 1970).