guest ::
| Home > Publications database > Understanding the conductive channel evolution in Na:WO $_{3−x}$ -based planar devices |
| Home > Publications database > Understanding the conductive channel evolution in Na:WO $_{3−x}$ -based planar devices |
| Journal Article | FZJ-2015-03773 |
; ; ; ; ; ; ; ; ;
2015
RSC Publ.
Cambridge
This record in other databases: 
Please use a persistent id in citations: doi:10.1039/C4NR07545E
Abstract: An ion migration process in a solid electrolyte is important for ion-based functional devices, such as fuel cells, batteries, electrochromics, gas sensors, and resistive switching systems. In this study, a planar sandwich structure is prepared by depositing tungsten oxide (WO3−x) films on a soda-lime glass substrate, from which Na+ diffuses into the WO3−x films during the deposition. The entire process of Na+ migration driven by an alternating electric field is visualized in the Na-doped WO3−x films in the form of conductive channel by in situ optical imaging combined with infrared spectroscopy and near-field imaging techniques. A reversible change of geometry between a parabolic and a bar channel is observed with the resistance change of the devices. The peculiar channel evolution is interpreted by a thermal-stress-induced mechanical deformation of the films and an asymmetric Na+ mobility between the parabolic and the bar channels. These results exemplify a typical ion migration process driven by an alternating electric field in a solid electrolyte with a low ion mobility and are expected to be beneficial to improve the controllability of the ion migration in ion-based functional devices, such as resistive switching devices.
; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 5 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection
|
The record appears in these collections: |
PDF
PDF (PDFA)