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Santos AJ, Martin N, Jiménez JJ, Alcántara R, Margueron S, Casas-Acuña A, García R, Morales FM. Facile Fabrication of High-Performance Thermochromic VO 2-Based Films on Si for Application in Phase-Change Devices. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2023; 35:4435-4448. [PMID: 37332680 PMCID: PMC10268973 DOI: 10.1021/acs.chemmater.3c00613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Revised: 05/15/2023] [Indexed: 06/20/2023]
Abstract
This work reports on an alternative and advantageous procedure to attain VO2-based thermochromic coatings on silicon substrates. It involves the sputtering of vanadium thin films at glancing angles and their subsequent fast annealing in an air atmosphere. By adjusting thickness and porosity of films as well as the thermal treatment parameters, high VO2(M) yields were achieved for 100, 200, and 300 nm thick layers treated at 475 and 550 °C for reaction times below 120 s. Comprehensive structural and compositional characterization by Raman spectroscopy, X-ray diffraction, and scanning-transmission electron microscopies combined with analytical techniques such as electron energy-loss spectroscopy bring to the fore the successful synthesis of VO2(M) + V2O3/V6O13/V2O5 mixtures. Likewise, a 200 nm thick coating consisting exclusively of VO2(M) is also achieved. Conversely, the functional characterization of these samples is addressed by variable temperature spectral reflectance and resistivity measurements. The best results are obtained for the VO2/Si sample with changes in reflectance of 30-65% in the near-infrared at temperatures between 25 and 110 °C. Similarly, it is also proven that the achieved mixtures of vanadium oxides can be advantageous for certain optical applications in specific infrared windows. Finally, the features of the different structural, optical, and electrical hysteresis loops associated with the metal-insulator transition of the VO2/Si sample are disclosed and compared. These remarkable thermochromic performances hereby accomplished highlight the suitability of these VO2-based coatings for applications in a wide range of optical, optoelectronic, and/or electronic smart devices.
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Affiliation(s)
- Antonio J. Santos
- IMEYMAT:
Institute of Research on Electron Microscopy and Materials of the
University of Cádiz, Puerto
Real E-11510, Spain
- Department
of Materials Science and Metallurgic Engineering, and Inorganic Chemistry,
Faculty of Sciences, University of Cádiz, Puerto Real E-11510, Spain
- Université
de Franche-Comté, CNRS, Institut FEMTO-ST, Besançon F-25000, France
| | - Nicolas Martin
- Université
de Franche-Comté, CNRS, Institut FEMTO-ST, Besançon F-25000, France
| | - Juan J. Jiménez
- IMEYMAT:
Institute of Research on Electron Microscopy and Materials of the
University of Cádiz, Puerto
Real E-11510, Spain
- Department
of Materials Science and Metallurgic Engineering, and Inorganic Chemistry,
Faculty of Sciences, University of Cádiz, Puerto Real E-11510, Spain
| | - Rodrigo Alcántara
- IMEYMAT:
Institute of Research on Electron Microscopy and Materials of the
University of Cádiz, Puerto
Real E-11510, Spain
- Department
of Physical Chemistry, Faculty of Sciences, University of Cádiz, Puerto Real E-11510, Spain
| | - Samuel Margueron
- Université
de Franche-Comté, CNRS, Institut FEMTO-ST, Besançon F-25000, France
| | - Andrea Casas-Acuña
- IMEYMAT:
Institute of Research on Electron Microscopy and Materials of the
University of Cádiz, Puerto
Real E-11510, Spain
- Department
of Materials Science and Metallurgic Engineering, and Inorganic Chemistry,
Faculty of Sciences, University of Cádiz, Puerto Real E-11510, Spain
| | - Rafael García
- IMEYMAT:
Institute of Research on Electron Microscopy and Materials of the
University of Cádiz, Puerto
Real E-11510, Spain
- Department
of Materials Science and Metallurgic Engineering, and Inorganic Chemistry,
Faculty of Sciences, University of Cádiz, Puerto Real E-11510, Spain
| | - Francisco M. Morales
- IMEYMAT:
Institute of Research on Electron Microscopy and Materials of the
University of Cádiz, Puerto
Real E-11510, Spain
- Department
of Materials Science and Metallurgic Engineering, and Inorganic Chemistry,
Faculty of Sciences, University of Cádiz, Puerto Real E-11510, Spain
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Green formulation, chemical characterization and anti-acute leukemia effects of vanadium nanoparticles containing Foeniculum vulgare extract. JOURNAL OF SAUDI CHEMICAL SOCIETY 2022. [DOI: 10.1016/j.jscs.2022.101573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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