Hasan SARIGÜL, Mukaddes ÖZÇEŞMECİ, İdris SORAR

Sol-Jel Yöntemiyle Hazırlanan Kobalt Ftalosiyanin Katkılı TiO2 Filmlerin Optik ve Yapısal Özelliklerinin İncelenmesi

Bu çalışmada, sol-jel spin kaplama yöntemi kullanılarak mikroskop cam altlıklar üzerine TiO2, TiO2/CoPc ve CoPc filmleri hazırlanmış ve CoPc katkı konsantrasyonunun filmlerin optik ve yapısal özellikleri üzerine etkisi araştırılmıştır. İnce filmlerin optik geçirgenliğini ölçmek için 300-1100 nm dalgaboyu aralığında bir spektrofotometre kullanılmıştır. Uv-Vis çalışmaları, B ve Q bandı absorpsiyon bölgelerine karşılık gelen aralıklarda artan CoPc konsantrasyonu ile filmlerin geçirgenliğinin azaldığını göstermiştir. İnce filmlerin yüzey morfolojisini karakterize etmek için taramalı elektron mikroskobu (SEM) kullanılmış ve homojen olarak kaplandıkları görülmüştür. Tavlanmış filmlerin XRD ölçümlerinde, TiO2 filmlerde anataz-brookit karışık faz görülürken TiO2/CoPc filmlerin anataz olduğu tespit edilmiştir. Filmlerin dislokasyon yoğunluğu, kristal boyutu gibi önemli parametreleri hesaplanmıştır.

Anahtar Kelimeler:

TiO2, copc, sol-jel, optik özellikler, yapısal özellikler

Investigation of Optical and Structural Properties of Cobalt Phthalocyanine Doped TiO2 Films Prepared by Sol-Gel Method

In this study, TiO2, TiO2/CoPc and CoPc films were prepared on microscope slide substrates using sol-gel spin coating method and the effect of CoPc additive concentration on the optical and structural properties of the films was investigated. A spectrophotometer in the 300-1100 nm wavelength range was used to measure the optical transmittance of thin films. Uv-Vis studies have shown transmittance of films decreases with increasing CoPc concentration in the intervals corresponding to the B and Q band absorption regions. Scanning electron microscopy (SEM) was used to characterize the surface morphology of thin films and it was observed that they were coated homogeneously. In the XRD measurements of annealed films, it was determined that the anatase-brookite mixed phase was observed in TiO2 films, while TiO2/CoPc films were anatase. Important parameters such as dislocation density, the crystal size of the films were calculated.

Keywords:

TiO2, CoPc, sol-gel, optical properties, structural properties,

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Takada J., Awaji H., Koshioka M., Nakajima A., and Nevin W. A., Organic–inorganic multilayers: A new concept of optoelectronic material, Appl. Phys. Lett., 1992, 61(18): 2184–2186.
Pourteimoor S. and Azim-Araghi M. E., Optical studies of TiO2–lead phthalocyanine nanocomposite thin films prepared by electron beam evaporation, Materials Science in Semiconductor Processing, 2014, 18: 97–104.
Miles J. R., Willis M. R., and Jones R. P. O., Photoconduction properties of some monomeric phthalocyanines and dibromoanthrone, Materials Science in Semiconductor Processing, 2012 15(1): 61–72.
Ohmukai M., Kubota H., and Tsutsumi Y., The absorption band at 1.128 eV of copper phthalocyanine films, Appl. Phys. A, 2007, 88(2): 315–317.
Selcukoglu M. and Hamuryudan E., Novel phthalocyanines with pentafluorobenzyloxy-substituents, Dyes and Pigments, 2007, 74(2): 17–20, 2007.
An H., Bradshaw J. S., Izatt R. M., and Yan Z., Bis- and Oligo(benzocrown ether)s, Chem. Rev., 1994, 94(4): 939–991.
Kantar G. K. and Şaşmaz S., Microwave-asissted synthesis and spectral properties of some phthalocyanines containing azo groups, El-Cezeri Journal of Science and Engineering, 2015, 2(3): 0-0.
Arslanoğlu Y., Mert Sevim A., E. Hamuryudan, and A. Gül, Near-IR absorbing phthalocyanines, Dyes and Pigments, 2006, 68(2): 129–132.
Şener M. K., Gül A., and Koçak M. B., Synthesis of tetra(tricarbethoxy)- and tetra(dicarboxy)- substituted soluble phthalocyanines, Journal of Porphyrins and Phthalocyanines, 2003, 07(9): 617–622.
Yenilmez Y. H., Özçeşmeci İ., Okur A. İ., and Gül A., Synthesis and characterization of metal-free and metallo phthalocyanines with four pendant naphthoxy-substituents, Polyhedron,2004, 23(5): 787–791.
Özçeşmeci M., Özkan E., and Hamuryudan E., Synthesis, characterization, and aggregation properties of functionalized polyfluorinated metallo-phthalocyanines, J. Porphyrins Phthalocyanines,2013, 17(10): 972–979.
Sarigül H. and Sorar İ., Sol-Jel Yöntemiyle Hazırlanan TiO2 Filmlerin Optik ve Elektrokromik Özellikleri, Marmara Fen Bil Dergisi, 2016, 28(2): 81-88.
Haghighi M., Tajabadi F., Mahdavi S. M., Mohammadpour R., and Taghavinia N., Surfactant-free stable SnS2 nanoparticles dispersion for deposition of device-quality films, Thin Solid Films, 2019, 669: 269–274.
Özçeşmeci M., Sorar I., Özçeşmeci I., and Hamuryudan E., Synthesis, characterization, and optical studies of pentoxy-substituted tetrakis(pentafluorobenzyloxy)phthalocyanines, Journal of Coordination Chemistry, 2018, 71(15): 2281–2292.
Özçeşmeci M., Özçeşmeci İ., Sorar İ., and Hamuryudan E., Thin films of fluorinated groups substituted metallophthalocyanines as an optical material, Inorganic Chemistry Communications,2017 86: 209–212.
Ganjoo A. and Golovchak R., Computer program PARAV for calculating optical constants of thin films and bulk materials: Case study of amorphous semiconductors, 2008, 10: 1328-1332.
Tauc J., Amorphous and liquid semiconductors, Plenum London, New York, USA.
Verma A., Kar M., and Agnihotry S. A., Aging effect of diethanolamine stabilized sol on different properties of TiO2 films: Electrochromic applications, Solar Energy Materials and Solar Cells, 2007, 91(14): 1305–1312.
Zhao Z., Fan J., Xie M., and Wang Z., Photo-catalytic reduction of carbon dioxide with in-situ synthesized CoPc/TiO2 under visible light irradiation, Journal of Cleaner Production, 2009, 17(11): 1025–1029.
Kayani Z. N., Maria, Riaz S., and Naseem S., Magnetic and antibacterial studies of sol-gel dip coated Ce doped TiO2 thin films: Influence of Ce contents, Ceramics International, 2020,46(1): 381–390.
Scherrer P., Bestimmung der Größe und der inneren Struktur von Kolloidteilchen mittels Röntgenstrahlen, Nachrichten von der Gesellschaft der Wissenschaften zu Göttingen, Mathematisch-Physikalische Klasse, Inorganic Chemistry Institute Dr.-Ing. University of Göttingen HC Germany.
Klug H. P., X-ray diffraction procedures : for polycrystalline and amorphous materials, 1974, 79(6): 553.
Stokes A. R. and Wilson A. J. C., The diffraction of X rays by distorted crystal aggregates - I, Proc. Phys. Soc., 1944, 56(3): 174–181.
Borgese L. et al., Young modulus and Poisson ratio measurements of TiO2 thin films deposited with Atomic Layer Deposition, Surface and Coatings Technology, 2012, 206(8): 2459–2463.