A Robust 2D Photo‐Electrochemical Detector Based on NiPS3 Flakes. (19th September 2019)

• Record Type: Journal Article
• Authors: Liu, Jiefeng; Wang, Yingwei; Fang, Yiyun; Ge, Yanqi; Li, Xinzhe; Fan, Dianyuan; Zhang, Han
• Is Part Of: Advanced Electronic Materials. Volume 5:Number 12(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-09-19
• Subjects: electrochemical exfoliation -- metal phosphorus trichalcogenides -- NiPS3 -- photoelectrochemical photodetector -- self‐powered devices; Materials -- Electric properties -- Periodicals; Materials science -- Periodicals; Magnetic materials -- Periodicals; Electronic apparatus and appliances -- Periodicals; 537
• DOI: 10.1002/aelm.201900726
• Languages: English
• ISSNs: 2199-160X

Abstract

Abstract: Photodetectors fabricated from very thin two‐dimensional (2D) materials with high photoelectric conversion efficiency have unprecedented potential to overcome the limitations of conventional photodetectors. In particular, recent interest in 2D metal phosphorus trichalcogenides (MPTs) has derived from their strong light absorption, tunable bandgap, and robust stability. Here, large and atomically thin NiPS3 flakes, prepared by electrochemical cathodic exfoliation, are used as electrodes for a self‐powered photo‐electrochemical (PEC) detector. It exhibits high photocurrent density, sensitive responsivity, cycling stability, and excellent on/off behavior under sunlight in a 0.1 m KOH solution. The KOH concentration and the external potential affect the performance, indicating that it can be an excellent PEC‐type detector. This work provides fundamental knowledge about PEC‐type MPT photodetectors and reveals the great potential of NiPS3 as an optoelectronic device. Abstract : Large ultrathin NiPS3 flakes, prepared by electrochemical cathodic exfoliation, are used as electrodes for a self‐powered photo‐electrochemical (PEC)‐type detector. The detector exhibits high photocurrent density, sensitive responsivity, cycling stability, and excellent on/off behavior under appropriate conditions. This work provides fundamental knowledge about PEC‐type photodetectors of metal phosphorus trichalcogenides and reveals their great potential as an optoelectronic device.