Large‐Area Bilayer ReS₂ Film/Multilayer ReS₂ Flakes Synthesized by Chemical Vapor Deposition for High Performance Photodetectors

Abstract

Rhenium disulfide (ReS 2 ) is attracting more and more attention for its thickness-depended direct band gap. As a new appearing 2D transition metal dichalcogenide, the studies on synthesis method via chemical vapor deposition (CVD) is still rare. Here a systematically study on the CVD growth of continuous bilayer ReS 2 film and single crystalline hexagonal ReS 2 flake, as well as their corresponding optoelectronic properties is reported. Moreover, the growth mechanism has been proposed, accompanied with simulation study. High-performance photodetector based on ReS 2 flake shows a high responsivity of 604 A·W −1 , high external quantum efficiency of 1.50 × 10 5 %, and fast response time of 2 ms. ReS 2 film-based photodetector exhibits weaker performance than the flake one; however, it still demonstrates a much faster response time (≈10 3 ms) than other reported CVD-grown ReS 2 -based photodetector (≈10 4 -10 5 ms). Such good properties of ReS 2 render it a promising future in 2D optoelectronics.

Advent of 2D Rhenium Disulfide (ReS2): Fundamentals to Applications

“…These distort and eventually break the hexagonal symmetry (see Figure 3 a, b). [42] Unlike other TMDs (i.e. MoS2) that have high symmetry 1H-phase of trigonal prismatic crystal and a D3h point group symmetry or 2-layer hexagonal (2H) and three-layer rhombohedral (3R), ReS2 has Peierls distortion from conventional 1T-phase of octahedral crystal with a P1(bar) symmetry.…”

“…investigation. [42] , [56,57] Below we discuss the recently reported ReS2-derived nanostructures and related growth mechanisms.…”

“…[42] There are two growth directions, (100), which is fast and dominant, and; (020) which is relatively slow. This asymmetry of directional growth ideally culminates with nanorods-like 1D structure.…”

Progress on Crystal Growth of Two-Dimensional Semiconductors for Optoelectronic Applications

“…Among all the studies and reports on TMDC growth, CVD is still the most popular and reliable method for bottom-up synthesis of TMDCs. Up until now, many TMDC films have been achieved by CVD including MoS 2 [53][54][55][56][57] [62,63]. These synthesis methods can be categorized into solid-phase precursor growth and gas-phase precursor growth.…”

“…For TMDCs, single channel photodetectors, CVD synthesis with solid-phase metal oxide and sulfur precursors are widely used because of the easy synthesis approach, large single crystal domain, and high mobility. Photodetectors based on CVD MoS 2 [113,131], MoSe 2 [132,133], ReS 2 [63,114], ReSe 2 [134], SnS 2 [135,136], SnSe 2 [137], and WS 2 [110,122] have been studied recently. Jing et al reported a MoS 2 phototransistor array that can detect room light illumination [138].…”