Optoelectronics of Atomic Metal–Semiconductor Interfaces in Tin-Intercalated MoS₂

Abstract

Metal−semiconductor interfaces are ubiquitous in modern electronics. These quantum-confined interfaces allow for the formation of atomically thin polarizable metals and feature rich optical and optoelectronic phenomena, including plasmon-induced hot-electron transfer from metal to semiconductors. Here, we report on the metal−semiconductor interface formed during the intercalation of zerovalent atomic layers of tin (Sn) between layers of MoS 2 , a van der Waals layered material. We demonstrate that Sn interaction leads to the emergence of gap states within the MoS 2 band gap and to corresponding plasmonic features between 1 and 2 eV (0.6−1.2 μm). The observed stimulation of the photoconductivity, as well as the extension of the spectral response from the visible regime toward the mid-infrared suggests that hot-carrier generation and internal photoemission take place.

Promoting 2D Material Photodetectors by Optical Antennas beyond Noble Metals

“…[142] For example, Han et al have demonstrated the formation of intercalated Cu carpets within MoS 2 via a vacancy-mediated atomic diffusion strategy. [143] Up to now, a myriad of approaches have been developed for the atomic intercalation of various non-noble metals spanning Fe, [144] Co, [145] Sn, [146,147] Cu, [148] etc. In this respect, it is theoretically feasible to integrate non-noble metal optical antennas within 2DLMs through atomic intercalation techniques to improve their interaction with the incident light.…”

Materials Nanoarchitectonics for Advanced Physics Research

“…Dimensionally restricted materials synthesis such as functional nanowire fabrications [113][114][115][116] have important roles in the nanoarchitectonics strategies. Other types of nanofunctional structures, such as those concerning the electrical properties of heterojunctions of metal-semiconductor materials [117,118] and the physical properties at direct bonding interfaces, [119,120] would also contribute to the nanoarchitectonics approaches. Although this article focuses mainly on optics and electricity properties, the mechanical properties and reliability are also important for nanoscale metals and semiconductors.…”

Robust Sandwiched B/TM/B Structures by Metal Intercalating into Bilayer Borophene Leading to Excellent Hydrogen Evolution Reaction

“…Intercalation has been experimentally proved to be feasible in common 2D materials including graphene, [ 72 ] phosphorene, [ 73 ] and MoS 2 , [ 74,75 ] but still needs further study for commercialization. Borophene is an excellent conductor, Fermi velocity of carriers is even faster than graphene with Dirac Fermions.…”

“…For example, appreciable catalytic performance can be obtained by intercalation of sandwich-like X/M/X structure of transition metal dichalcogenide, [10][11][12][13] layered double hydroxides, [66][67][68] and Mxenes. [16,[69][70][71] Intercalation has been experimentally proved to be feasible in common 2D materials including graphene, [72] phosphorene, [73] and MoS 2 , [74,75] but still needs further study for commercialization. Borophene is an excellent conductor, Fermi velocity of carriers is even faster than graphene with Dirac Fermions.…”