Enhancing Light–Matter Interactions in MoS2 by Copper Intercalation

• DOI: 10.1002/adma.202008779
• Publication Date: 2021-05-06T21:43:39Z
• Authors: Chen Stern; Avraham Twitto; Rifael Z. Snitkoff; Yafit Fleger; Sabyasachi Saha; Loukya Boddapati; Akash Jain; Mengjing Wang; Kristie J. Koski; Francis Leonard D...; Ashwin Ramasubram...; Doron Naveh
• Keywords: MoS 2; copper intercalation; 500; photodetectors; 02 engineering and technology; 0210 nano-technology; 7. Clean energy; Research Articles

AbstractThe 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.