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Optoelectronics of Atomic Metal-Semiconductor Interfaces in Tin-Intercalated MoS2
Avraham Twitto1,2, Chen Stern1,2, Michal Poplinger1,2
1Faculty of Engineering, Bar-Ilan University, Ramat Gan52900, Israel.
ACS Nano
|October 12, 2022
Summary
We explored tin (Sn) intercalation in molybdenum disulfide (MoS2) to create novel metal-semiconductor interfaces. This interaction generates unique plasmonic properties and enhances optoelectronic performance, suggesting potential for advanced electronic devices.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Metal-semiconductor interfaces are crucial for modern electronics.
- Quantum-confined interfaces enable unique optical and optoelectronic phenomena, such as plasmon-induced hot-electron transfer.
Purpose of the Study:
- To investigate the metal-semiconductor interface formed by intercalating tin (Sn) into molybdenum disulfide (MoS2).
- To explore the resulting optoelectronic properties and potential applications in advanced electronics.
Main Methods:
- Intercalation of zero-valent atomic layers of tin (Sn) between layers of MoS2.
- Characterization of the resulting interface and its electronic and optical properties.
Main Results:
- Tin intercalation creates gap states within the MoS2 band gap.
- Observed plasmonic features between 1 and 2 eV (0.6-1.2 μm).
- Stimulated photoconductivity and extended spectral response into the mid-infrared indicate hot-carrier generation and internal photoemission.
Conclusions:
- The Sn/MoS2 interface exhibits novel plasmonic behavior.
- Hot-carrier generation and internal photoemission are facilitated at this interface.
- This system shows promise for developing new optoelectronic devices.
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