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A transparent electrochromic metal-insulator switching device with three-terminal transistor geometry
Proton and hydroxyl ion play an essential role for tuning functionality of oxides because their electronic state can be controlled by modifying oxygen off-stoichiometry and/or protonation. Tungsten trioxide (WO(3)), a well-known electrochromic (EC) material for smart window, is a wide bandgap insula...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4865842/ https://www.ncbi.nlm.nih.gov/pubmed/27174791 http://dx.doi.org/10.1038/srep25819 |
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author | Katase, Takayoshi Onozato, Takaki Hirono, Misako Mizuno, Taku Ohta, Hiromichi |
author_facet | Katase, Takayoshi Onozato, Takaki Hirono, Misako Mizuno, Taku Ohta, Hiromichi |
author_sort | Katase, Takayoshi |
collection | PubMed |
description | Proton and hydroxyl ion play an essential role for tuning functionality of oxides because their electronic state can be controlled by modifying oxygen off-stoichiometry and/or protonation. Tungsten trioxide (WO(3)), a well-known electrochromic (EC) material for smart window, is a wide bandgap insulator, whereas it becomes a metallic conductor H(x)WO(3) by protonation. Although one can utilize electrochromism together with metal-insulator (MI) switching for one device, such EC-MI switching cannot be utilized in current EC devices because of their two-terminal structure with parallel-plate configuration. Here we demonstrate a transparent EC-MI switchable device with three-terminal TFT-type structure using amorphous (a-) WO(3) channel layer, which was fabricated on glass substrate at room temperature. We used water-infiltrated nano-porous glass, CAN (calcium aluminate with nano-pores), as a liquid-leakage-free solid gate insulator. At virgin state, the device was fully transparent in the visible-light region. For positive gate voltage, the active channel became dark blue, and electrical resistivity of the a-WO(3) layer drastically decreased with protonation. For negative gate voltage, deprotonation occurred and the active channel returned to transparent insulator. Good cycleability of the present transparent EC-MI switching device would have potential for the development of advanced smart windows. |
format | Online Article Text |
id | pubmed-4865842 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-48658422016-05-23 A transparent electrochromic metal-insulator switching device with three-terminal transistor geometry Katase, Takayoshi Onozato, Takaki Hirono, Misako Mizuno, Taku Ohta, Hiromichi Sci Rep Article Proton and hydroxyl ion play an essential role for tuning functionality of oxides because their electronic state can be controlled by modifying oxygen off-stoichiometry and/or protonation. Tungsten trioxide (WO(3)), a well-known electrochromic (EC) material for smart window, is a wide bandgap insulator, whereas it becomes a metallic conductor H(x)WO(3) by protonation. Although one can utilize electrochromism together with metal-insulator (MI) switching for one device, such EC-MI switching cannot be utilized in current EC devices because of their two-terminal structure with parallel-plate configuration. Here we demonstrate a transparent EC-MI switchable device with three-terminal TFT-type structure using amorphous (a-) WO(3) channel layer, which was fabricated on glass substrate at room temperature. We used water-infiltrated nano-porous glass, CAN (calcium aluminate with nano-pores), as a liquid-leakage-free solid gate insulator. At virgin state, the device was fully transparent in the visible-light region. For positive gate voltage, the active channel became dark blue, and electrical resistivity of the a-WO(3) layer drastically decreased with protonation. For negative gate voltage, deprotonation occurred and the active channel returned to transparent insulator. Good cycleability of the present transparent EC-MI switching device would have potential for the development of advanced smart windows. Nature Publishing Group 2016-05-13 /pmc/articles/PMC4865842/ /pubmed/27174791 http://dx.doi.org/10.1038/srep25819 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Katase, Takayoshi Onozato, Takaki Hirono, Misako Mizuno, Taku Ohta, Hiromichi A transparent electrochromic metal-insulator switching device with three-terminal transistor geometry |
title | A transparent electrochromic metal-insulator switching device with three-terminal transistor geometry |
title_full | A transparent electrochromic metal-insulator switching device with three-terminal transistor geometry |
title_fullStr | A transparent electrochromic metal-insulator switching device with three-terminal transistor geometry |
title_full_unstemmed | A transparent electrochromic metal-insulator switching device with three-terminal transistor geometry |
title_short | A transparent electrochromic metal-insulator switching device with three-terminal transistor geometry |
title_sort | transparent electrochromic metal-insulator switching device with three-terminal transistor geometry |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4865842/ https://www.ncbi.nlm.nih.gov/pubmed/27174791 http://dx.doi.org/10.1038/srep25819 |
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