Journal
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
Volume 27, Issue -, Pages 254-260Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.mssp.2014.06.028
Keywords
Organic films; Optical properties; Effect of annealing
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Thin films of Litanyl 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), held-emission scanning electron microscopy (FESEM), and Fourier-transform infrared (FT-lR) 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 rim 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. (C) 2014 Elsevier Ltd. All rights reserved.
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