Sensors: Significant Exciton Brightening in Monolayer Tungsten Disulfides via Fluorination: n-Type Gas Sensing Semiconductors (Adv. Funct. Mater. 42/2016)
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- 作者：Young In Jhon ; Younghee Kim ; June Park ; Jae Hun Kim ; Taikjin Lee ; Minah Seo and Young Min Jhon
- 刊名：Advanced Functional Materials
- 出版年：2016
- 出版时间：November 8, 2016
- 年：2016
- 卷：26
- 期：42
- 页码：7541
- 全文大小：2130K
- ISSN：1616-3028
文摘
The photoluminescence (PL) in monolayer (1L) WS2 greatly varies depending on its electron density. A “chemical tuner” for PL variation in 1L WS2, is described by Y. M. Jhon and co-workers on page 7551. Hydrogen and/or fluorine plasma treatments allow for tuning of the PL brightness in a reversible way for unlimited cycles. Even a small amount of fluorine dopants significantly brighten PL in 1L WS2 due to their strong electron affinity. The approach is successfully applied in NH3 gas sensing.