Electric‐Field‐Controlled Phase Transformation in WO3 Thin Films through Hydrogen Evolution

• DOI: 10.1002/adma.201703628
• Publication Date: 2017-10-23T06:02:41Z
• Authors: Meng Wang; Shengchun Shen; Jinyang Ni; Nianpeng Lu; Zhuolu Li; Hao‐Bo Li; Shuzhen Yang; Tianzhe Chen; Jingwen Guo; Yujia Wang; Hongjun Xiang; Pu Yu
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract Field‐effect transistors with ionic‐liquid gating (ILG) have been widely employed and led to numerous intriguing phenomena in the last decade, due associated excellent carrier‐density tunability. However, role of electrochemical effect during ILG has become a heavily debated topic recently. Herein, using ILG, field‐induced insulator‐to‐metal transition is achieved WO 3 thin films emergence structural transformations whole films. The subsequent secondary‐ion mass spectrometry study provides solid evidence that electrochemically driven hydrogen evolution dominates discovered electrical transformation through surface absorption bulk intercalation.