Farklı katodik potansiyellerde Zn (NO3) .6H2O sulu çözeltisi kullanılarak elektrodepozisyon yöntemi ile elde edilen ZnO filmlerin bazı fiziksel özellikleri

Farklı katodik potansiyellerde ITO kaplı cam alt tabaka üzerinde elektrokimyasal depozisyon ile hazırlanan polikristal ZnO filmler incelenmiştir. Tüm deneylerde, Zn (NO3) .6H2O sulu çözeltisi elektrolit olarak kullanılmıştır ve depozisyon sıcaklığı depozisyon boyunca 72OC tutulmuştur. Dönüşümlü voltametri deneyleri elektrodepozisyon için katodik potansiyel aralığının tespiti için yapılmıştır. Bundan sonra, -0.80 V’den 1,16 V’ye kadar artarak değişen katodik potansiyel aralığı seçilmiştir. Polikristal ZnO filmlerin karakterizasyonu X-ışını kırınımı (XRD), UV-vis spektrofotometre ve taramalı elektron mikroskobu (SEM) yöntemleri kullanılarak gerçekleştirilmiştir. XRD sonuçları, tüm filmlerin altıgen kristal yapısında olduğunu ve tüm filmlerin yaklaşık olarak 46 nm tane büyüklüğünde oluşturulmuş olduğunu göstermiştir. ZnO filmlerin enerji bant aralığı 3.50 eV’ ile 3.56 eV aralığında değişmektedir. Polikristalin ZnO filmlerin morfolojisi büyük ölçüde elektrokimyasal depozisyon işleminin katodik potansiyeline bağlı olduğu SEM görüntülerinden anlaşılmaktadır. Ayrıca dilim şeklide, pullu ve dantele benzeyen çeşitli morfolojik yapılar bulunmuştur.

Some physical properties of the ZnO films obtained by electrodeposition using Zn (NO3) .6H2O aqueous solution at different cathodic potentials

Polycrystalline ZnO films prepared by electrodeposited on ITO coated glass substrate at different cathodic potential wereinvestigated. In all experiments Zn(NO3).6H2O aqueous solution was used as an electrolyte and depositions temperature werekept at 72OC for the period of the depositions. Cyclic voltammetry experiments were performed to determinate the cathodicpotential ranging for electrodeposition. After that, the cathodic potential ranging from -0.8 to -1.16 V were selected.Characterization of polycrystalline ZnO films was realized using X-ray diffraction (XRD), UV-vis spectrophotometer andscanning electron microscopy (SEM) methods .XRD results shown that all films formed in hexagonal crystal structure andcrystallite sizes of the all films are approximately 46 nm. The energy band gaps of the ZnO films are from 3.50 to 3.56 eV. Itwas understood from the SEM images that the morphology of polycrystalline ZnO films depends greatly on the cathodic potentialof depositions. Also various morphological structure was found such as slicely, lamellar and lace like structure.

PDF

___

J. Wellings, N. Chaure, S. Heavens ve I. Dharmadasa, ‘‘Growth and characterisation of electrodeposited ZnO thin films’’, Thin Solid Films, vol.516, pp. 3893- 3898, 2008.
D. A. Hamdane Chettah, ‘‘Effect of the electrochemical technique on nanocrystalline ZnO electrodeposition, its’’, Thin Solid Films. vol. 537, pp. 119-123, 2013.
Q. Wang, Q. Cao, X. Wang, B. Jing, H. Kuang and L. Zhou, ‘‘A high-capacity carbon prepared from renewable chicken feather biopolymer for supercapacitors’’, Journal of Power Sources, vol. 225, pp. 101-107, 2013.
A. Azizi, M. Khelladi, L. Mentar and V. Subramaniam, ‘‘A study on Electrodeposited of Zinc Oxide Nanostructures’’, Journel of Materials Science Materials in Electronics, vol. 24, no.1, pp. 153- 159, 2013.
C. Lin, . H. Lin, J. Li and X. Li, ‘‘ Electrodeposition preparation of ZnO nanobelt array films and application to dye-sensitized solar cells’’, Journal of Alloys and Compounds, vol. 462, pp. 175–180, 2008.
M. Va´zquez and M. Berruet, ‘‘Electrodeposition of single and duplex layers of ZnO with different morphologies and electrical properties’’, Materials Science in Semiconductor Processing, vol. 13, pp. 239- 244, 2010.
J. A. R. Márquez ve C. M. B. Rodr, ‘‘ Effect of Surface Morphology of ZnO Electrodeposited on Photocatalytic Oxidation of Methylene Blue Dye Part I: Analytical Study’’, Int. J. Electrochem. Sci., vol. 6, pp. 4059-4069, 2011.
R. Bhowmik, M. N. Murty and E. S. Srinadhu, ‘‘Magnetic modulation in mechanical alloyed Cr1.4Fe0.6O3’’, PMC Physics B., pp. I : 20., 2008.
A. H. Mundher, ‘‘Preparation and characterization ZnO nanoparticles and study of morphology at high temperature’’, Iraqi Journal of Physics, vol. 10, no. 18, pp. 17-23, 2012.
M. Chaari, A. Matoussi and . Z. Fakhfakh, ‘‘Structural and Dielectric Properties of Sintering Zinc Oxide Bulk Ceramic’’, Materials Sciences and Application, vol. 2, pp. 765-770, 2011.
T. Mahalingam, V. S. John and L. S. Hsu, ‘‘ Microstructural Analysis of Electrodeposited Zinc Oxide Thin Films’’, Journal of New Materials for Electrochemical Systems, vol. 10, pp. 9-14, 2007.
A. M. Palve and S. S. Garje, ‘‘ Preparation of Nanostructured Zinc Oxide from Single Source Precursors’’, Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry, vol. 40, pp. 153–156, 2010.
M. Yilmaz, D. Tatar, . E. Sonmez ve . C. Ci, ‘‘Investigation of Structural, Morphological, Optical,and Electrical Properties of Al Doped ZnO Thin Films Via Spin Coating Technique’’, Synthesis and Reactivity in Inorganic, Metal-Organic, and NanoMetal Chemistry, vol. 46, pp. 489-494, 2016.