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Facile Fabrication of High-Performance Thermochromic VO(2)-Based Films on Si for Application in Phase-Change Devices

[Image: see text] This work reports on an alternative and advantageous procedure to attain VO(2)-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 a...

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Autores principales: Santos, Antonio J., Martin, Nicolas, Jiménez, Juan J., Alcántara, Rodrigo, Margueron, Samuel, Casas-Acuña, Andrea, García, Rafael, Morales, Francisco M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2023
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10268973/
https://www.ncbi.nlm.nih.gov/pubmed/37332680
http://dx.doi.org/10.1021/acs.chemmater.3c00613
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author Santos, Antonio J.
Martin, Nicolas
Jiménez, Juan J.
Alcántara, Rodrigo
Margueron, Samuel
Casas-Acuña, Andrea
García, Rafael
Morales, Francisco M.
author_facet Santos, Antonio J.
Martin, Nicolas
Jiménez, Juan J.
Alcántara, Rodrigo
Margueron, Samuel
Casas-Acuña, Andrea
García, Rafael
Morales, Francisco M.
author_sort Santos, Antonio J.
collection PubMed
description [Image: see text] This work reports on an alternative and advantageous procedure to attain VO(2)-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 VO(2)(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 VO(2)(M) + V(2)O(3)/V(6)O(13)/V(2)O(5) mixtures. Likewise, a 200 nm thick coating consisting exclusively of VO(2)(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 VO(2)/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 VO(2)/Si sample are disclosed and compared. These remarkable thermochromic performances hereby accomplished highlight the suitability of these VO(2)-based coatings for applications in a wide range of optical, optoelectronic, and/or electronic smart devices.
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spelling pubmed-102689732023-06-16 Facile Fabrication of High-Performance Thermochromic VO(2)-Based Films on Si for Application in Phase-Change Devices Santos, Antonio J. Martin, Nicolas Jiménez, Juan J. Alcántara, Rodrigo Margueron, Samuel Casas-Acuña, Andrea García, Rafael Morales, Francisco M. Chem Mater [Image: see text] This work reports on an alternative and advantageous procedure to attain VO(2)-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 VO(2)(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 VO(2)(M) + V(2)O(3)/V(6)O(13)/V(2)O(5) mixtures. Likewise, a 200 nm thick coating consisting exclusively of VO(2)(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 VO(2)/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 VO(2)/Si sample are disclosed and compared. These remarkable thermochromic performances hereby accomplished highlight the suitability of these VO(2)-based coatings for applications in a wide range of optical, optoelectronic, and/or electronic smart devices. American Chemical Society 2023-05-30 /pmc/articles/PMC10268973/ /pubmed/37332680 http://dx.doi.org/10.1021/acs.chemmater.3c00613 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Santos, Antonio J.
Martin, Nicolas
Jiménez, Juan J.
Alcántara, Rodrigo
Margueron, Samuel
Casas-Acuña, Andrea
García, Rafael
Morales, Francisco M.
Facile Fabrication of High-Performance Thermochromic VO(2)-Based Films on Si for Application in Phase-Change Devices
title Facile Fabrication of High-Performance Thermochromic VO(2)-Based Films on Si for Application in Phase-Change Devices
title_full Facile Fabrication of High-Performance Thermochromic VO(2)-Based Films on Si for Application in Phase-Change Devices
title_fullStr Facile Fabrication of High-Performance Thermochromic VO(2)-Based Films on Si for Application in Phase-Change Devices
title_full_unstemmed Facile Fabrication of High-Performance Thermochromic VO(2)-Based Films on Si for Application in Phase-Change Devices
title_short Facile Fabrication of High-Performance Thermochromic VO(2)-Based Films on Si for Application in Phase-Change Devices
title_sort facile fabrication of high-performance thermochromic vo(2)-based films on si for application in phase-change devices
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10268973/
https://www.ncbi.nlm.nih.gov/pubmed/37332680
http://dx.doi.org/10.1021/acs.chemmater.3c00613
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