화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.28, No.9, 805-812, August, 2020
DOI10.1007/s13233-020-8100-6  Export Citation
Highly Precise Determination of Structural and Optical Parameters of an Innovative (PVA-VOCl) for Flexible Polymer-Semiconductor Devices
Fayez M. Ali1, 2, †, and Fethi Maiz1, 3
  • 1Faculty of Science, Physics Department, King Khalid University, P. O. Box 9004, Abha 61413, Saudi Arabia
  • 2Physics Department, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt
  • 3Thermal Process Laboratory Research and Technologies Center of Energy, Borj-Cedria Science and Technologies Park, BP 95, 2050, Hammam-lif, Tunisia
E-mail:
A novel polymer-semiconductor nanocomposites of polyvinyl alcoholoxovanadium chloride (PVA-VOCl) films have been successfully synthesized by the simple solution casting technique. XRD analysis of the prepared films confirms the formation of VOCl nanocrystals with different particle sizes distributed in the PVA polymer resulting in the increment in the crystalline phase of the whole structure of PVA-VOCl polymer nanocomposite. The Fourier transform infrared (FT-IR) spectroscopy measurements indicate the distribution of VOCl in the polymer matrix. The optical absorption spectra measurements exhibit a complete blocking of the UV range (200?400 nm) due to VOCl dispersion in the polymer matrix. The optical gap Eg of the films were determined with a high degree of precision using Tauc relation, Absorption spectra fitting and the new accurate geometric method show a strong decrease from 5.2 eV for pure PVA to 2.85 eV with increasing the VOCl level in the polymer film. In addition, the high-frequency refractive index estimated from the optical gap values exhibits a significant increase from 1.70 to 2.07. Our samples can be considered as an innovative flexible optical material for UV filters, optoelectronics, and photonics applications.
Keywords:polymer-semiconductor nanocomposites;X-ray diffraction (XRD);absorption spectra fitting (ASF);optical filter;high-frequency refractive index;optoelectronics devices
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