Chromogenic MoO3 thin films: thermo-, photo-, and electrochromic response to working pressure variation in rf reactive magnetron sputtering
| Autor: | Miguel A Arvizu, S. A. Tomás, M. Pérez-González, M. Ponce-Mosso, P.E. García-Tinoco, H. Crotte-Ledesma, V. Cruz San Martín, M. Morales-Luna |
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| Rok vydání: | 2018 |
| Předmět: |
Thermochromism
Argon Materials science Annealing (metallurgy) Analytical chemistry chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials Molybdenum trioxide chemistry.chemical_compound chemistry Electrochromism Sputtering Electrical and Electronic Engineering Cyclic voltammetry Thin film 0210 nano-technology |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 29:15486-15495 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-018-9101-5 |
| Popis: | The thermochromic, photochromic, and electrochromic properties of molybdenum trioxide (MoO3) thin films were studied. MoO3 thin films were deposited by rf reactive magnetron sputtering and the influence of deposition parameters, i.e. O2/Ar gas ratio and working pressure, on the chromogenic properties was investigated. Thermochromism was induced by annealing the samples in either air or argon in the range 23–300 °C for 2 h. We found that the highest response was obtained for samples grown at 5.3 × 10−1 Pa, although films annealed in air showed a maximum coloration around 250 °C that became bleached above this temperature. As for the annealing in argon, the thermochromic effect increased even at 300 °C. By exposing samples to UV irradiation in air, photochromism could be induced for different intervals ranging from 0 to 3 h. The highest photochromic response was obtained for samples deposited at 1.3 Pa. Cyclic voltammetry for 20 cycles in a 1 M LiClO4 in propylene carbonate solution, inside a glovebox filled with argon, was used to evaluate the electrochromic response. Samples that showed optimum electrochromic response were deposited at 1.6 Pa. These results are explained in terms of the optical, structural, surface chemical composition, and vibrational modes. |
| Databáze: | OpenAIRE |
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