1D/2D Hybrid Te/Graphene and Te/MoS₂: Multifaceted Broadband Photonics and Green-Energy Applications

Abstract

We highlight the enhanced electronic and optical functionalization in the hybrid heterojunction of one-dimensional (1D) tellurene with a two-dimensional (2D) monolayer of graphene and MoS 2 in both lateral and vertical geometries. The structural configurations of these assemblies are optimized with a comparative analysis of the energetics for different positional placements of the 1D system with respect to the hexagonal 2D substrate. The 1D/2D coupling of the electronic structure in this unique assembly enables the realization of the three different types of heterojunctions, viz. type I, type II, and Z-scheme. The interaction with 1D tellurene enables the opening of a band gap of the order of hundreds of meV in 2D graphene for both lateral and vertical geometries. With both static and time-dependent first-principles analysis, we indicate their potential applications in broadband photodetection and absorption, covering a wide range of visible to infrared (near-IR to mid-IR) spectrum from 380 to 10 000 nm. We indicate that this 1D/2D assembly also has bright prospects in green-energy harvesting.

Activating two-dimensional semiconductors for photocatalysis: a cross-dimensional strategy

“…The photocatalytic activity can be tuned by imposing strain on the 2D ZnO/GeC system, resulting from the tuned bandgaps and band alignment [128]. In another study, Maji et al probed both 1D + 2D Te/graphene and 1D + 2D Te/MoS 2 heterostructures, where the 1D Te nanoribbons positioned either laterally (figure 7(g)) or vertically (figure 7(j)) on the surface [129]. The dimensionality of the heterojunction consequently varied, possessing either 1D or 0D characters.…”