Emerging pnictogen-based 2D semiconductors: sensing and electronic devices. Issue 19 (7th May 2020)

• Record Type: Journal Article
• Authors: Roy, Pradip Kumar; Luxa, Jan; Sofer, Zdeněk
• Is Part Of: Nanoscale. Volume 12:Issue 19(2020)
• Page Start: 10430
• Page End: 10446
• Publication Date: 2020-05-07
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/d0nr02932g
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : Pnictogens have drawn tremendous attention due to their electronic structure and semiconducting character. Their fascinating features provide a novel platform for new devices in 2D materials which will pave the way for new nanodevices. Abstract : Pnictogens are an intensively studied group of monoelemental two-dimensional materials. This group of elements consists of phosphorus, arsenic, antimony, and bismuth. In this group, the elements adopt two different layered structural allotropes, orthorhombic structure with true van der Waals layered interactions and rhombohedral structure, where covalent interactions between layers are also present. The orthorhombic structure is well known for phosphorus and arsenic, and the rhombohedral structure is the most thermodynamically stable allotropic modification of arsenic, antimony, and bismuth. Due to the electronic structure of pnictogen layers and their semiconducting character, these materials have huge application potential for electronic devices such as transistors and sensors including photosensitive devices as well as gas and electrochemical sensors. While photodetection and gas sensing applications are often related to lithography processed materials, chemical sensing proceeds in a liquid environment (either aqueous or non-aqueous) and can be influenced by surface oxidation of these materials. In this review, we explore the current state of pnictogen applications in sensing and electronic devices including transistors, photodetectors, gas sensors, and chemical/electrochemical sensors.