Light‐Induced Ambient Degradation of Few‐Layer Black Phosphorus: Mechanism and Protection
-
- Qionghua Zhou
- Department of Physics Southeast University Nanjing 211189 P.R. China
-
- Qian Chen
- Department of Physics Southeast University Nanjing 211189 P.R. China
-
- Yilong Tong
- Department of Physics Southeast University Nanjing 211189 P.R. China
-
- Jinlan Wang
- Department of Physics Southeast University Nanjing 211189 P.R. China
説明
<jats:title>Abstract</jats:title><jats:p>The environmental instability of single‐ or few‐layer black phosphorus (BP) has become a major hurdle for BP‐based devices. The degradation mechanism remains unclear and finding ways to protect BP from degradation is still highly challenging. Based on ab initio electronic structure calculations and molecular dynamics simulations, a three‐step picture on the ambient degradation of BP is provided: generation of superoxide under light, dissociation of the superoxide, and eventual breakdown under the action of water. The well‐matched band gap and band‐edge positions for the redox potential accelerates the degradation of thinner BP. Furthermore, it was found that the formation of P‐O‐P bonds can greatly stabilize the BP framework. A possible protection strategy using a fully oxidized BP layer as the native capping is thus proposed. Such a fully oxidization layer can resist corrosion from water and leave the BP underneath intact with simultaneous high hole mobility.</jats:p>
収録刊行物
-
- Angewandte Chemie International Edition
-
Angewandte Chemie International Edition 55 (38), 11437-11441, 2016-08-16
Wiley