<p>Vanadium dioxide (VO<sub>2</sub>) exhibits reversible thermal phase transitions, with a transition temperature near room temperature, making it a promising functional material for phase change applications. However, VO<sub>2</sub> thin films face challenges such as a trade-off between luminous transmittance and solar modulation capability, as well as a phase transition temperature that is too high for practical use. This study addresses these issues by synthesizing Eu-doped VO<sub>2</sub> thin films using a novel hydrothermal-assisted electrophoretic approach. The impact of Eu doping on the structural, morphological, thermal, optical, and mechanical properties of VO<sub>2</sub> films was comprehensively analyzed. Key findings reveal that Eu doping increases lattice spacing and results in a flower-like microstructure. At different Eu doping concentrations, the phase transition temperature has decreased, and the luminous transmittance and solar modulation capability have increased. In addition, the hardness and elastic modulus of the film have both been improved compared with the undoped thin film.</p>

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Hydrothermal-Assisted Electrophoretic Deposition for Preparing Eu-Doped VO2 Films and Characterization of the Thermochromic and Mechanical Properties

  • Jinjing Du,
  • Ruitong Zhai,
  • Haiyang Lin,
  • Jingtian Liu,
  • Xun Liu,
  • Bin Wang,
  • Dongbo Wang,
  • Jun Zhu,
  • Heng Zuo,
  • Qian Li,
  • Xihong He

摘要

Vanadium dioxide (VO2) exhibits reversible thermal phase transitions, with a transition temperature near room temperature, making it a promising functional material for phase change applications. However, VO2 thin films face challenges such as a trade-off between luminous transmittance and solar modulation capability, as well as a phase transition temperature that is too high for practical use. This study addresses these issues by synthesizing Eu-doped VO2 thin films using a novel hydrothermal-assisted electrophoretic approach. The impact of Eu doping on the structural, morphological, thermal, optical, and mechanical properties of VO2 films was comprehensively analyzed. Key findings reveal that Eu doping increases lattice spacing and results in a flower-like microstructure. At different Eu doping concentrations, the phase transition temperature has decreased, and the luminous transmittance and solar modulation capability have increased. In addition, the hardness and elastic modulus of the film have both been improved compared with the undoped thin film.