Abstract
In this work, the complex composite thin films based on polyvinyl chloride (PVC) doped with different iodine (I2) concentrations are deposited on a glass substrate. The doping mechanism and chemical properties for the PVC–I2 complex composites are studied using FTIR and UV–Vis absorbance spectroscopies, in addition to TGA. Optical and optoelectronic properties of the composite thin films are deduced using UV–Vis spectroscopy’s experimental transmittance and reflectance spectra and combining classical and quantum models. The optical bandgap energy of PVC film is found to be 4.01 eV. Introducing I2 to PVC films decreases bandgap energy, and thus, bandgap engineering is possible. The refractive of PVC thin film exhibits in the 1.66–2.01 range, as the wavelength decreases from 700 to 350 nm. In addition, it increases as the concentration of I2 in the polymeric matrix increases gradually to 7 wt%. The findings of this work demonstrate that optical, chemical, and thermal properties of PVC–I2 thin films can be significantly modified upon introducing an appropriate concentration of I2 nanofiller into the PVC polymeric matrix. Finally, doping mechanisms of iodine are crucial for the optical and electrical large free-volume PVC polymeric systems.
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Acknowledgements
The authors would like to acknowledge the deanship of scientific research at Jordan University of Science and Technology for financial, technical, and logistic support. Special acknowledgments are forwarded to Borhan A. Albiss and Mohammad A. Al-Omari at the Department of Physics, Jordan University of Science and Technology, for the access provided for their laboratories.
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Telfah, M., Ahmad, A.A., Alsaad, A.M. et al. Doping mechanism and optical properties of as-prepared polyvinyl chloride (PVC) doped by iodine thin films. Polym. Bull. 79, 10803–10822 (2022). https://doi.org/10.1007/s00289-022-04082-9
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DOI: https://doi.org/10.1007/s00289-022-04082-9