期刊
ADVANCED MATERIALS
卷 29, 期 46, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201703628
关键词
hydrogen evolution; ionic-liquid gating; phase transformation; WO3
类别
资金
- National Basic Research Program of China [2015CB921700, 2016YFA0301004]
- Initiative Research Projects of Tsinghua University [20141081116]
Field-effect transistors with ionic-liquid gating (ILG) have been widely employed and have led to numerous intriguing phenomena in the last decade, due to the associated excellent carrier-density tunability. However, the role of the electrochemical effect during ILG has become a heavily debated topic recently. Herein, using ILG, a field-induced insulator-to-metal transition is achieved in WO3 thin films with the emergence of structural transformations of the whole films. The subsequent secondary-ion mass spectrometry study provides solid evidence that electrochemically driven hydrogen evolution dominates the discovered electrical and structural transformation through surface absorption and bulk intercalation.
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