Effect of thermal annealing on structural and optical properties of titanyl phthalocyanine thin films |
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| Affiliation: | 1. Department of Physics, Faculty of Education, Ain Shams University, Roxy, 11757 Cairo, Egypt;2. Department of Laser Sciences and Interactions, National Institute of Laser Enhanced Sciences, Cairo University, 12613 Giza, Egypt;3. Department of Physics, Faculty of Science and Humanity Studies at Al- Quwayiyah, Shaqra University, Al-Quwayiyah 11971, Saudi Arabia;1. Physics Department, Faculty of Science, Ain Shams University, Abbasia, Cairo, Egypt;2. Physics Department, Faculty of Education, Ain Shams University, Heliopolis, Cairo, Egypt;1. Department of Physics, Faculty of Science at Damietta, 34517 New Damietta, Egypt;2. Department of Physics, Faculty of Education, Ain Shams University, Roxy, Cairo 11757, Egypt;3. Solid State Electronics Laboratory, Solid State Physics Department, Physics Division, National Research Center, Dokki, Cairo 12311, Egypt;1. Department of Physics, Faculty of Education at Al-Mahweet, Sana’a University, Al-Mahwit, Yemen;2. Department of Physics Faculty of Science, Al-Azhar University, Assiut, Egypt;3. Department of Physics, Faculty of Science, University of Tabuk, Tabuk, Saudi Arabia;4. Department of Physics, Faculty of Education, Aim Shams University, Roxy 11757, Cairo, Egypt;1. Institute of Macromolecular Chemistry Academy of Sciences, Heyrovskeho Sq., 162 06 Prague 6, Czech Republic;2. Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentska 84, 532 10 Pardubice, Czech Republic;1. Facultad de Ingeniería, Universidad Anáhuac México Norte. Avenida Universidad Anáhuac 46, Col. Lomas Anáhuac, 52786 Huixquilucan, Estado de México, Mexico;2. Instituto de Física, Dpto. Materia Condensada, Universidad Nacional Autónoma de México, Coyoacán, 04510 México, D.F., Mexico |
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| Abstract: | Thin films of titanyl phthalocyanine (TiOPc) have been deposited on both fused quartz and glass substrates by the thermal evaporation technique. The structural and optical properties of the as-deposited and annealed films have been reported. The structural features of the as-deposited and annealed films have been studied by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), and Fourier-transform infrared (FT-IR) technique. The optical constants (refractive index, n, and absorption index, k) of the films have been presented for the first time in the wavelength range 200–2500 nm by using spectrophotometric measurements at nearly normal incidence. The band gaps of the as-deposited film at 1.48 eV and 2.5 eV corresponding to Q-band and B or Soret band were red-shifted to 1.15 eV and 2.19 eV, respectively, when the film annealed at 433 K. |
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| Keywords: | Organic films Optical properties Effect of annealing |
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