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Sensors: Significant Exciton Brightening in Monolayer Tungsten Disulfides via Fluorination: n‐Type Gas Sensing Semiconductors (Adv. Funct. Mater. 42/2016)
Author(s) -
Jhon Young In,
Kim Younghee,
Park June,
Kim Jae Hun,
Lee Taikjin,
Seo Minah,
Jhon Young Min
Publication year - 2016
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201670273
Subject(s) - monolayer , materials science , fluorine , photoluminescence , brightness , exciton , tungsten , semiconductor , dopant , hydrogen , electron density , optoelectronics , analytical chemistry (journal) , electron , chemical physics , chemical engineering , photochemistry , nanotechnology , doping , condensed matter physics , optics , organic chemistry , chemistry , physics , engineering , metallurgy , quantum mechanics
The photoluminescence (PL) in monolayer (1L) WS 2 greatly varies depending on its electron density. A “chemical tuner” for PL variation in 1L WS 2 , 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 WS 2 due to their strong electron affinity. The approach is successfully applied in NH 3 gas sensing.