Structural, optical, electrical, and dielectric properties of HPMC/PVP blend reinforced with I2O5 for optoelectronics and energy storage applications

Authors

  • Maha Aiiad Alenizi Department of Physics, Faculty of Sciences-Arar, Northern Border University, P.O. Box 1321, 91431, Arar, Saudi Arabia Author
  • E. H. Mater Department of Mechatronics, College of Engineering and Smart Computing, Modern Specialized University, Sana’a, Yemen Author
  • G. M. Asnag Department of Biomedical Engineering, College of Engineering and Information Technology, Emirates International University, Sana’a, 16881, Yemen Department of Optometry and Visual Science, College of Medical Sciences, Al-Razi University, Sana’a, Yemen Author
  • S. A. Al-Ghamdi Advanced Materials Research Laboratory, Department of Physics, Faculty of Science, University of Tabuk, Tabuk, 71491, Saudi Arabia Author
  • Amani M. Al-Harthi Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia Author
  • Reem Alwafi Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia Author
  • E. M. Abdallah Department of Basic Sciences, Delta University for Science and Technology, Gamassa, Mansoura, Egypt Author
  • Ahmed N. Al-Hakimi Department of Chemistry, College of Sciences, Qassim University, Qassim, Buraidah, 51452, Saudi Arabia Author
  • Eman Alzahrani Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia Author
  • Randa A. Althobiti Department of Chemistry, College of Science, University of Bisha, P.O. Box 551, Bisha, 61922, Saudi Arabia Author
  • E. M. Abdelrazek Physics Department, Faculty of Science, Mansoura University, Mansoura, Egypt Author
  • A. A. Al-Muntaser Department of Physics, Faculty of Education and Applied Sciences at Arhab, Sana’a University, Sana’a, Yemen Author
  • Abdu Saeed Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia Department of Physics, Thamar University, Thamar, 87246, Yemen Author

Keywords:

I2O5 ; HPMC/PVP blend ; Composite electrolytes ; Energy storage

Abstract

Herein, HPMC/PVP/I2O5 composite samples were prepared from the blend of two polymers, hydroxypropyl methylcellulose (HPMC) and polyvinylpyrrolidone (PVP), filled with different concentrations of iodine pentoxide (I2O5) as fillers by using the solution casting technique for advanced applications in optoelectronics and energy storage. The addition of I2O5 as a filler aims to enhance the optical and electrical properties of HPMC/PVP/I2O5 composite samples. Comprehensive characterizations were conducted to elucidate the structural, optical, and electrical/dielectric properties relationships and to assess the suitability of these materials for required applications. XRD scans demonstrate the semi-crystalline structure of the pure blend and show a decrease in the degree of crystallinity due to the incorporation of I2O5. UV-Vis spectroscopy indicated enhanced optical properties within the composites, characterized by a reduction in the indirect/direct optical energy gap of 4.74/5.14 eV for pure HPMC/PVP matrix to 2.61/3.64 eV for the polymeric matrix containing 5 wt% I2O5. Furthermore, the incorporation of I2O5 led to a significant increase in AC conductivity compared to the pristine polymer blend. The dielectric constant (ε′) increased in the low-frequency region due to space charge polarization. In the dielectric properties, space charge polarization revealed higher values, where the ε′ increased at lower frequency regions. Nyquist plots exhibited distinctive features, including semicircles at low frequencies and inclined lines at high frequencies. The decrease in the radius of these semicircles with increasing filler content suggests a correlation with the composite’s electrical properties. Electrical equivalent circuit models have described these observations. These findings collectively suggest the potential of these composites as bandgap tuners, optical sensors, tunable dielectrics, and promising candidates for solid polymer electrolytes. Their incorporation could significantly advance the performance of next-generation energy storage and conversion devices.

 

Author Biographies

  • E. H. Mater, Department of Mechatronics, College of Engineering and Smart Computing, Modern Specialized University, Sana’a, Yemen
    E. H. Mater
    • Department of Mechatronics, College of Engineering and Smart Computing, Modern Specialized University, Sana’a, Yemen
     
  • G. M. Asnag, Department of Biomedical Engineering, College of Engineering and Information Technology, Emirates International University, Sana’a, 16881, Yemen Department of Optometry and Visual Science, College of Medical Sciences, Al-Razi University, Sana’a, Yemen

    Corresponding author

    G. M. Asnag
    • Department of Biomedical Engineering, College of Engineering and Information Technology, Emirates International University, Sana’a, 16881, Yemen
    • Department of Optometry and Visual Science, College of Medical Sciences, Al-Razi University, Sana’a, Yemen

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2026-05-10

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How to Cite

Alenizi, M. A., Mater, E. H., Asnag, G. M., Al-Ghamdi, S. A., Al-Harthi, A. M., Alwafi, R., Abdallah, E. M., Al-Hakimi, A. N., Alzahrani, E., Althobiti, R. A., Abdelrazek, E. M., Al-Muntaser, A. A., & Saeed, A. (2026). Structural, optical, electrical, and dielectric properties of HPMC/PVP blend reinforced with I2O5 for optoelectronics and energy storage applications. Emirates International University Digital Repository, 1(1). https://journals.eiu.edu.ye/index.php/eiudr/article/view/170

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