Related Experiment Video
Updated: May 13, 2026
11:10
Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
Published on: May 23, 2018
Reduction Processes in Thin-Film Vanadium Oxides for Application in Optoelectronic Devices.
Dmitriy P Sudas1, Vasily O Yapaskurt2, Valery A Luzanov1
1Kotel'nikov Institute of Radioengineering and Electronics, Russian Academy of Sciences, Fryazino Branch, Fryazino 141190, Russia.
Nanomaterials (Basel, Switzerland)
|May 12, 2026
Summary
This study optimized vanadium oxide thin-film synthesis for VO2 and V2O5 production. Annealing in hydrogen yielded superior VO2 coatings with narrower phase transition hysteresis and enhanced optical properties.
Area of Science:
- Materials Science
- Nanotechnology
- Thin-film deposition
Background:
- Vanadium oxide thin films are crucial for optical and electronic applications.
- Real-time characterization of nanomaterial synthesis is challenging.
- Controlling the phase composition of vanadium oxides is key for performance.
Purpose of the Study:
- To develop and optimize synthesis and annealing processes for vanadium oxide thin films.
- To investigate the real-time optical properties during deposition and annealing.
- To determine the optimal conditions for producing vanadium dioxide (VO2) and vanadium pentoxide (V2O5).
Main Methods:
- Organometallic precursor (triisopropoxy vanadium) for thin-film deposition.
- Lossy-mode resonance spectroscopy for real-time optical constant estimation.
- Scanning electron microscopy (SEM) and atomic force microscopy (AFM) for surface morphology analysis.
- Optical, terahertz, and Raman spectroscopy, plus electrical resistance measurements for characterization.
Main Results:
- Amorphous vanadium oxide films (mixture of VO2, V2O5, V6O13, V3O5) were deposited.
- Real-time optical constants were measured during synthesis and annealing.
- Optimal synthesis and annealing conditions for VO2 and V2O5 were identified.
- Reduction of higher vanadium oxides to VO2 was attributed to elemental carbon from the precursor.
- Hydrogen annealing resulted in VO2 with narrower phase transition hysteresis (~5 °C) compared to argon annealing (~9 °C).
- Both annealed coatings showed significant improvements in THz/IR transmission and electrical resistance switching.
Conclusions:
- The study established effective methods for synthesizing tailored vanadium oxide thin films.
- Real-time optical monitoring provides crucial insights into material transformation.
- Hydrogen annealing is superior for achieving VO2 with enhanced phase transition properties.
- The presence of carbon from the organometallic precursor plays a role in the reduction process.
- Optimized vanadium oxide films exhibit promising performance for THz and IR applications.
