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6CCVD Research

Dual-Stimuli Responsive V 4 O 7 Thin Films - Electrochromic and Thermochromic Modulation of Structural, Optical, and Electronic Properties

At a Glance

Section titled “At a Glance”
MetadataDetails
Publication Date2025-06-01
JournalJournal of Nanoelectronics and Optoelectronics
AuthorsNawal K. Almaymoni, A. M. Abdel-Baset, Dhafer O. Alshahrani, Mohamed R. Eid, Amnah M. Alofi
InstitutionsAl Baha University, Northern Border University

Abstract

Section titled “Abstract”

This study investigates the structural, optical, and electronic properties of V 4 O 7 thin films deposited on glass substrates using an innovative ultrasonic deposition technique. X-ray diffraction (XRD) analysis revealed low crystallinity with a prominent peak at 7.29°, consistent with MagnĂ©li phase formation, while high-resolution scanning electron microscopy (HRSEM) confirmed hexagonal diamond-like nanostructures. The optical behavior of V 4 O 7 thin films was systematically examined under electrochromic (voltage-induced) and thermochromic (temperature-induced) stimuli, demonstrating contrasting effects. Electrochromic modulation reduced optical absorbance and increased the optical bandgap, whereas thermochromic influence enhanced absorbance and shifted the Fermi level toward lower energy states. Variations in the extinction coefficient, refractive index, and dielectric loss tangent further elucidated the dynamic optical response, suggesting potential applications in smart windows, optical switches, and adaptive thermal sensors. The study also quantified key optoelectronic parameters, including nonlinear refractive indices and optical conductivity, revealing that electrochromic effects predominantly alter bandgap energy without affecting the static refractive index, while thermochromic effects enhance refractive indices without perturbing the bandgap. These findings highlight the dual-stimuli responsive nature of V 4 O 7 thin films, offering insights into their tunable optical properties for advanced optoelectronic and thermo-optical applications. The results underscore the material’s versatility in next-generation devices, where external stimuli can precisely modulate optical transitions, paving the way for multifunctional coatings in energy-efficient displays and adaptive optical systems.

Tech Support

Section titled “Tech Support”

Original Source

Section titled “Original Source”

References

Section titled “References”
  1. 2021 - Novel thermochromic (TC) and electrochromic (EC) characteristics of the V4O7 liquid crystal for LCDs and versatile optoelectronic applications. [Crossref]
  2. 2025 - V4O7 microcubes as an alternative to peroxidase/TMB for colorimetric detection of H2O2: Development of glucose sensing method. [Crossref]
  3. 2016 - Advanced High Strength Natural Fibre Composites in Construction
  4. 2020 - New Materials in Civil Engineering [Crossref]
  5. 2016 - Smart Textiles and Their Applications [Crossref]
  6. 2017 - Transition Metal Oxide Thin Film-Based Chromogenics and Devices
  7. 2016 - Polymer Materials for Energy and Electronic Applications
  8. 2012 - Composition dependence of spectroscopic properties and transparency of SiO2-TiO2-Na2O glass in 200-1100 nm.
  9. 2021 - Optical and structural studies of some zinc calcium borate glasses for optoelectronic device applications.
  10. 2020 - The influence of both Zn2+ and Ca2+ on linear and nonlinear optical parameters of some bismuth borate-based glasses. [Crossref]

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