Enhancing Light-Matter Interactions in MoS2 by Copper Intercalation

Chen Stern; Avraham Twitto; Rifael Z Snitkoff; Yafit Fleger; Sabyasachi Saha; Loukya Boddapati; Akash Jain; Mengjing Wang; Kristie J Koski; Francis Leonard Deepak; Ashwin Ramasubramaniam; Doron Naveh

doi:10.1002/adma.202008779

Enhancing Light-Matter Interactions in MoS₂ by Copper Intercalation

Adv Mater. 2021 Jun;33(23):e2008779. doi: 10.1002/adma.202008779. Epub 2021 May 6.

Authors

Chen Stern^{1

2}, Avraham Twitto^{1

2}, Rifael Z Snitkoff^{1

2}, Yafit Fleger², Sabyasachi Saha^{3

4}, Loukya Boddapati³, Akash Jain⁵, Mengjing Wang⁶, Kristie J Koski⁶, Francis Leonard Deepak³, Ashwin Ramasubramaniam⁷, Doron Naveh^{1

2}

Affiliations

¹ Faculty of Engineering, Bar-Ilan University, Ramat-Gan, 52900, Israel.
² Institute for Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan, 52900, Israel.
³ Nanostructured Materials Group, International Iberian Nanotechnology Laboratory, Avenida Mestre José Veiga s/n, Braga, 4715-330, Portugal.
⁴ Electron Microscopy Group, Defence Metallurgical Research Laboratory (DMRL), Hyderabad, 500058, India.
⁵ Department of Chemical Engineering, University of Massachusetts, Amherst, MA, 01003, USA.
⁶ Department of Chemistry, University of California Davis, Davis, CA, 95616, USA.
⁷ Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, MA, 01003, USA.

PMID: 33955078
DOI: 10.1002/adma.202008779

Abstract

The intercalation of layered compounds opens up a vast space of new host-guest hybrids, providing new routes for tuning the properties of materials. Here, it is shown that uniform and continuous layers of copper can be intercalated within the van der Waals gap of bulk MoS₂ resulting in a unique Cu-MoS₂ hybrid. The new Cu-MoS₂ hybrid, which remains semiconducting, possesses a unique plasmon resonance at an energy of ≈1eV, giving rise to enhanced optoelectronic activity. Compared with high-performance MoS₂ photodetectors, copper-enhanced devices are superior in their spectral response, which extends into the infrared, and also in their total responsivity, which exceeds 10⁴ A W^-1 . The Cu-MoS₂ hybrids hold promise for supplanting current night-vision technology with compact, advanced multicolor night vision.

Keywords: MoS 2; copper intercalation; photodetectors.

Abstract

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