Air-Stable Surface Charge Transfer Doping of MoS 2 by Benzyl Viologen
University of California, Berkeley · Lawrence Berkeley National Laboratory
Abstract
Air-stable doping of transition metal dichalcogenides is of fundamental importance to enable a wide range of optoelectronic and electronic devices while exploring their basic material properties. Here we demonstrate the use of benzyl viologen (BV), which has one of the highest reduction potentials of all electron-donor organic compounds, as a surface charge transfer donor for MoS2 flakes. The n-doped samples exhibit excellent stability in both ambient air and vacuum. Notably, we obtained a high electron sheet density of ~1.2 × 10(13) cm(-2), which corresponds to the degenerate doping limit for MoS2. The BV dopant molecules can be reversibly removed by immersion in toluene, providing the ability to control the…
Citation impact
- FWCI
- 25.44
- Percentile
- 100%
- References
- 26
Authors
5- DKDaisuke KiriyaCorresponding
University of California, Berkeley, Lawrence Berkeley National Laboratory
- MTMahmut Tosun
University of California, Berkeley, Lawrence Berkeley National Laboratory
- PZPeida Zhao
Lawrence Berkeley National Laboratory, University of California, Berkeley
- JSJeong Seuk Kang
Lawrence Berkeley National Laboratory, University of California, Berkeley
- AJAli Javey
Lawrence Berkeley National Laboratory, University of California, Berkeley
Topics & keywords
- Chemistry
- Doping
- Viologen
- Charge (physics)
- Photochemistry
- Condensed matter physics