New highly efficient 2D SiC UV-absorbing material with plasmonic light trapping

Abstract

The present paper is a systematic analysis of the thermoelectric and optical properties of the SiC monolayer. Based on the density functional theory (DFT) combined with the Boltzmann transport theory, the thermal conductivity, the electrical conductivity and the figures of merit are all determined and discussed for the SiC hybrid. At room temperature, it is found that SiC shows interesting values with respect to its counterparts graphene and silicene. To improve the absorption of the SiC sheet, a strategy is proposed using finite-difference time-domain (FDTD) combing with PSO-based approach. The absorbance of the UV-photodector with SiC monolayer and the SiC-based photodector with Au plasmonic grating are studied. Among our findings, the Au plasmonic grating enhances the absorbance of SiC to reach a maximum absorbance of 99.6% at the resonance wavelength of (λ = 310 nm), which significantly improves the performance of UV-sensors. Therefore, by combining optical DFT analysis with FDTD simulation supported by global PSO optimization, we have been able to develop a new SiC monolayer high performance UV photodetector suitable for advanced optoelectronic applications.

Two-Dimensional Silicon Carbide: Emerging Direct Band Gap Semiconductor

“…Graphene can only absorb 2.3% of the normal incident light per monolayer, and as such its application as a photodetector material is limited. On contrary, 2D SiC exhibits 4.6% absorption of incident UV-light that can be boosted to 99.6% with gold plasmonic gratings [ 39 , 90 , 91 ]. Thus, it can be used as high-performance UV photodetector in high temperature, high power, and radiation-resistant applications.…”

Thermal transport in multilayer silicon carbide nanoribbons: reverse non-equilibrium molecular dynamics

“…One of the most promising ways is engineering new structures based on transition metal dichalcogenides (TMDs), transition metal oxides (TMOs), hexagonal boron nitride (hBN), group-IV-IV binary compounds, black phosphorous (BP) as well as the III-VI family of semiconductors (InSe, GaS). [2][3][4][5][6][7][8] Hexagonal nanoribbons constitute an important class of nanomaterials, where the confinement of a phonon and electron on the armchair (AC) or zigzag (ZZ) boundary leads to unique electronic and optical properties depending on their width and edge configuration. 9 The abundance of carbon and silicon means that siliconcarbide materials have attracted wide attention.…”

First-principles study of SiC and GeC monolayers with adsorbed non-metal atoms

“…These features have encouraged researchers to explore XC (X = Si and Ge) monolayers for visible and ultraviolet (UV-Vis) LEDs and photovoltaic devices. 38,39 Remembering that these 2D materials are intrinsically non-magnetism. Therefore, research efforts have been devoted to induce magnetism, consequently their practical applications could be extended to, for example, spintronics eld.…”