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The Influence of the Structural and Morphological Properties of WO(3) Thin Films Obtained by PLD on the Photoelectrochemical Water-Splitting Reaction Efficiency
Due to its physical and chemical properties, the n-type tungsten oxide (WO(3)) semiconductor is a suitable photoanode for water decomposition reaction. The responses of the photoelectrochemical PEC water-splitting properties as an effect of structural and optical changes of WO(3) thin films, as well...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7825140/ https://www.ncbi.nlm.nih.gov/pubmed/33418853 http://dx.doi.org/10.3390/nano11010110 |
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author | Andrei, Florin Andrei, Andreea Birjega, Ruxandra Sirjita, Eduard Nicolae Radu, Alina Irina Dinescu, Maria Ion, Valentin Maraloiu, Valentin-Adrian Teodorescu, Valentin Şerban Scarisoreanu, Nicu Doinel |
author_facet | Andrei, Florin Andrei, Andreea Birjega, Ruxandra Sirjita, Eduard Nicolae Radu, Alina Irina Dinescu, Maria Ion, Valentin Maraloiu, Valentin-Adrian Teodorescu, Valentin Şerban Scarisoreanu, Nicu Doinel |
author_sort | Andrei, Florin |
collection | PubMed |
description | Due to its physical and chemical properties, the n-type tungsten oxide (WO(3)) semiconductor is a suitable photoanode for water decomposition reaction. The responses of the photoelectrochemical PEC water-splitting properties as an effect of structural and optical changes of WO(3) thin films, as well as the nature of electrolyte solutions, were studied in this work. The WO(3) thins films have been obtained by pulsed laser deposition (PLD) on silicon (Si(001)) covered with platinum substrates using three different laser wavelengths. As the XRD (X-ray diffraction) and XTEM (cross-section transmission electron microscopy) analysis shows, the formation of highly crystalline monocline WO(3) phase is formed for the film deposited at 1064 nm wavelength and poor crystalline phases with a large ordering anisotropy, characteristic of 2D structures for the films deposited at 355 nm and 193 nm wavelengths, respectively. The photogenerated current densities J(ph) depend on the laser wavelength, in both alkaline and acidic electrolyte. The maximum values of the photocurrent density have been obtained for the sample prepared with laser emitting at 355 nm. This behavior can be correlated with the coherent crystallized atomic ordering that appear for long distances (10–15 nm) in the (001) plane of the monoclinic WO(3) phase structure films obtained at 355 nm laser wavelength. All the samples show poor current density in dark conditions and they are very stable in both acidic and alkaline solutions. The highest photocurrent density value is obtained in acidic solution for the WO(3) thin film prepared by 355 nm laser (29 mA/cm(2) at 1.6 V vs. RHE (1.35 V vs. Ag/AgCl)). |
format | Online Article Text |
id | pubmed-7825140 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-78251402021-01-24 The Influence of the Structural and Morphological Properties of WO(3) Thin Films Obtained by PLD on the Photoelectrochemical Water-Splitting Reaction Efficiency Andrei, Florin Andrei, Andreea Birjega, Ruxandra Sirjita, Eduard Nicolae Radu, Alina Irina Dinescu, Maria Ion, Valentin Maraloiu, Valentin-Adrian Teodorescu, Valentin Şerban Scarisoreanu, Nicu Doinel Nanomaterials (Basel) Article Due to its physical and chemical properties, the n-type tungsten oxide (WO(3)) semiconductor is a suitable photoanode for water decomposition reaction. The responses of the photoelectrochemical PEC water-splitting properties as an effect of structural and optical changes of WO(3) thin films, as well as the nature of electrolyte solutions, were studied in this work. The WO(3) thins films have been obtained by pulsed laser deposition (PLD) on silicon (Si(001)) covered with platinum substrates using three different laser wavelengths. As the XRD (X-ray diffraction) and XTEM (cross-section transmission electron microscopy) analysis shows, the formation of highly crystalline monocline WO(3) phase is formed for the film deposited at 1064 nm wavelength and poor crystalline phases with a large ordering anisotropy, characteristic of 2D structures for the films deposited at 355 nm and 193 nm wavelengths, respectively. The photogenerated current densities J(ph) depend on the laser wavelength, in both alkaline and acidic electrolyte. The maximum values of the photocurrent density have been obtained for the sample prepared with laser emitting at 355 nm. This behavior can be correlated with the coherent crystallized atomic ordering that appear for long distances (10–15 nm) in the (001) plane of the monoclinic WO(3) phase structure films obtained at 355 nm laser wavelength. All the samples show poor current density in dark conditions and they are very stable in both acidic and alkaline solutions. The highest photocurrent density value is obtained in acidic solution for the WO(3) thin film prepared by 355 nm laser (29 mA/cm(2) at 1.6 V vs. RHE (1.35 V vs. Ag/AgCl)). MDPI 2021-01-06 /pmc/articles/PMC7825140/ /pubmed/33418853 http://dx.doi.org/10.3390/nano11010110 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Andrei, Florin Andrei, Andreea Birjega, Ruxandra Sirjita, Eduard Nicolae Radu, Alina Irina Dinescu, Maria Ion, Valentin Maraloiu, Valentin-Adrian Teodorescu, Valentin Şerban Scarisoreanu, Nicu Doinel The Influence of the Structural and Morphological Properties of WO(3) Thin Films Obtained by PLD on the Photoelectrochemical Water-Splitting Reaction Efficiency |
title | The Influence of the Structural and Morphological Properties of WO(3) Thin Films Obtained by PLD on the Photoelectrochemical Water-Splitting Reaction Efficiency |
title_full | The Influence of the Structural and Morphological Properties of WO(3) Thin Films Obtained by PLD on the Photoelectrochemical Water-Splitting Reaction Efficiency |
title_fullStr | The Influence of the Structural and Morphological Properties of WO(3) Thin Films Obtained by PLD on the Photoelectrochemical Water-Splitting Reaction Efficiency |
title_full_unstemmed | The Influence of the Structural and Morphological Properties of WO(3) Thin Films Obtained by PLD on the Photoelectrochemical Water-Splitting Reaction Efficiency |
title_short | The Influence of the Structural and Morphological Properties of WO(3) Thin Films Obtained by PLD on the Photoelectrochemical Water-Splitting Reaction Efficiency |
title_sort | influence of the structural and morphological properties of wo(3) thin films obtained by pld on the photoelectrochemical water-splitting reaction efficiency |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7825140/ https://www.ncbi.nlm.nih.gov/pubmed/33418853 http://dx.doi.org/10.3390/nano11010110 |
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