Effects of contact material on complex excitonic behaviour of monolayer MoS2
Source abstract
Abstract
Abstract We investigated the optical behaviour of excitons in monolayer MoS 2 prepared on a 60 nm-thick metal (Au) ring structure patterned on SiO 2 . CVD-grown monolayer MoS 2 was transferred to the metal structure and placed in contact with three different environments simultaneously: SiO 2 , Au metal and air. The optical properties of the transferred MoS 2 on the substrates were characterized through micro-photoluminescence (μ-PL) measurements. PL peaks were observed near ∼1.82 eV for defect-related emission, ∼1.92 eV for an A exciton, which includes a neutral exciton and a trion, and ∼2.1 eV for a B exciton. The optical band gap and exciton-phonon interaction of the samples on the three substrates were investigated by measuring the temperature-dependent photoluminescence.
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Research context
OpenAlex topics: 2D Materials and Applications · Perovskite Materials and Applications · MXene and MAX Phase Materials
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References (27)
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