Plasmonic Organic Solar Cells

Wu, Bobo; Mathews, Nripan; Sum, Tze-Chien

doi:10.1007/978-981-10-2021-6

Cited by 8 publications

(1 citation statement)

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“…To improve characteristics of the biosensor, we covered the surface of gold with a periodical MoS 2 /Gr heterostructure. Here, MoS 2 is employed as a high-index material, whereas the topmost graphene sheet can serve as an effective linking layer [64,65]. We found that the optical sensitivity of the SPR biosensor is enhanced by deposition of the MoS 2 /Gr heterostructure, reaching as high as 167 deg/RIU with three added bilayers (Figure 6b).…”

Section: Non-additive Optical Effects In Optical Constantsmentioning

confidence: 92%

Non-Additive Optical Response in Transition Metal Dichalcogenides Heterostructures

et al. 2022

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Van der Waals (vdW) heterostructures pave the way to achieve the desired material properties for a variety of applications. In this way, new scientific and industrial challenges and fundamental questions arise. One of them is whether vdW materials preserve their original optical response when assembled in a heterostructure. Here, we resolve this issue for four exemplary monolayer heterostructures: MoS2/Gr, MoS2/hBN, WS2/Gr, and WS2/hBN. Through joint Raman, ellipsometry, and reflectance spectroscopies, we discovered that heterostructures alter MoS2 and WS2 optical constants. Furthermore, despite the similarity of MoS2 and WS2 monolayers, their behavior in heterostructures is markedly different. While MoS2 has large changes, particularly above 3 eV, WS2 experiences modest changes in optical constants. We also detected a transformation from dark into bright exciton for MoS2/Gr heterostructure. In summary, our findings provide clear evidence that the optical response of heterostructures is not the sum of optical properties of its constituents.

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Section: Non-additive Optical Effects In Optical Constantsmentioning

confidence: 92%