Large‐Area Bilayer ReS2 Film/Multilayer ReS2 Flakes Synthesized by Chemical Vapor Deposition for High Performance Photodetectors. (18th April 2016)

• Record Type: Journal Article
• Authors: Hafeez, Muhammad; Gan, Lin; Li, Huiqiao; Ma, Ying; Zhai, Tianyou
• Is Part Of: Advanced functional materials. Volume 26:Number 25(2016)
• Page Start: 4551
• Page End: 4560
• Publication Date: 2016-04-18
• Subjects: 2D materials -- chemical vapor deposition -- interlayer coupling -- photodetectors -- ReS2; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.201601019
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract : Rhenium disulfide (ReS2 ) 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 ReS2 film and single crystalline hexagonal ReS2 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 ReS2 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. ReS2 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 ReS2 ‐based photodetector (≈10 4 –10 5 ms). Such good properties of ReS2 render it a promising future in 2D optoelectronics. Abstract : Hexagonal single‐crystal ReS2 flakes and large‐area continuous polycrystalline bilayer ReS2 film are achieved via CVD method, and their possible growth mechanism is studied. Potential utilization of ReS2 in high performance photodetector is explored. A single‐crystal ReS2 ‐based photodetector is found to be of excellent photoresponsivity (604 A W −1 ), high external quantum efficiency (1.50 × 10 5 %), and fast response time (2 ms), obviously superior to many other similar transition‐metal‐dichalcogenide‐based photodetectors.