Enhancing Light–Matter Interactions in MoS<sub>2</sub> by Copper Intercalation
Chen Stern, Avraham Twitto, Rifael Z. Snitkoff, Yafit Fleger, Sabyasachi Saha, B. Loukya, Akash Jain, Mengjing Wang, Kristie J. Koski, Francis Leonard Deepak, Ashwin Ramasubramaniam, Doron Naveh
Abstract
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 MoS 2 resulting in a unique Cu–MoS 2 hybrid. The new Cu–MoS 2 hybrid, which remains semiconducting, possesses a unique plasmon resonance at an energy of ≈1eV, giving rise to enhanced optoelectronic activity. Compared with high‐performance MoS 2 photodetectors, copper‐enhanced devices are superior in their spectral response, which extends into the infrared, and also in their total responsivity, which exceeds 10 4 A W −1 . The Cu–MoS 2 hybrids hold promise for supplanting current night‐vision technology with compact, advanced multicolor night vision.