Tunable photoluminescence of monolayer MoS₂ via chemical doping.
We demonstrate the tunability of the photoluminescence (PL) properties of monolayer (1L)-MoS2 via chemical doping. The PL intensity of 1L-MoS2 was drastically enhanced by the adsorption of p-type dopants with high electron affinity but reduced by the adsorption of n-type dopants. This PL modulation results from switching between exciton PL and trion PL depending on carrier density in 1L-MoS2. Achievement of the extraction and injection of carriers in 1L-MoS2 by this solution-based chemical doping method enables convenient control of optical and electrical properties of atomically thin MoS2.
Institute of Advanced Energy, Kyoto University , Uji, Kyoto 611-0011, Japan.
Shinichiro
S
Mouri
Yuhei
Y
Miyauchi
Kazunari
K
Matsuda
D004220:Disulfides / Q000737:chemistry*; D049449:Luminescence; D008982:Molybdenum / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D055095:Optics and Photonics; D010316:Particle Size
D004220:Disulfides; D008982:Molybdenum