4 years ago

Controlled Gas Molecules Doping of Monolayer MoS2 via Atomic-Layer-Deposited Al2O3 Films

Controlled Gas Molecules Doping of Monolayer MoS2 via Atomic-Layer-Deposited Al2O3 Films
Zheng Liu, Haiyang Xu, Shuai Zhang, Weizhen Liu, Jia Shi, Yichun Liu, Qing Zhang, Xinshu Li, Xiaohui Qiu, Yuanzheng Li, Xinfeng Liu, Qiuyu Shang, Heyu Chen
MoS2 as atomically thin semiconductor is highly sensitive to ambient atmosphere (e.g., oxygen, moisture, etc.) in optical and electrical properties. Here we report a controlled gas molecules doping of monolayer MoS2 via atomic-layer-deposited Al2O3 films. The deposited Al2O3 films, in the shape of nanospheres, can effectively control the contact areas between ambient atmosphere and MoS2 that allows precise modulation of gas molecules doping. By analyzing photoluminescence (PL) emission spectra of MoS2 with different thickness of Al2O3, the doped carrier concentration is estimated at ∼2.7 × 1013 cm–2 based on the mass action model. Moreover, time-dependent PL measurements indicate an incremental stability of single layer MoS2 as the thicknesses of Al2O3 capping layer increase. Effective control of gas molecules doping in monolayer MoS2 provides us a valuable insight into the applications of MoS2 based optical and electrical devices.

Publisher URL: http://dx.doi.org/10.1021/acsami.7b08893

DOI: 10.1021/acsami.7b08893

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.