Hokkaido University Collection of Scholarly and Academic Papers >
Research Institute for Electronic Science >
Peer-reviewed Journal Articles, etc >
A transparent electrochromic metal-insulator switching device with three-terminal transistor geometry
This item is licensed under:Creative Commons Attribution 4.0 International
Title: | A transparent electrochromic metal-insulator switching device with three-terminal transistor geometry |
Authors: | Katase, Takayoshi Browse this author | Onozato, Takaki Browse this author | Hirono, Misako Browse this author | Mizuno, Taku Browse this author | Ohta, Hiromichi Browse this author →KAKEN DB |
Issue Date: | 13-May-2016 |
Publisher: | Nature Publishing Group |
Journal Title: | Scientific reports |
Volume: | 6 |
Start Page: | 25819 |
Publisher DOI: | 10.1038/srep25819 |
Abstract: | 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 (WO3), a well-known electrochromic (EC) material for smart window, is a wide bandgap insulator, whereas it becomes a metallic conductor HxWO3 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-) WO3 channel layer, which was fabricated on glass substrate at room temperature. We used water-infiltrated nano-porous glass, CAN (calcium aluminate with nanopores), 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-WO3 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. |
Rights: | http://creativecommons.org/licenses/by/4.0/ |
Type: | article |
URI: | http://hdl.handle.net/2115/62263 |
Appears in Collections: | 電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 片瀬 貴義
|