Emerging Two‐Dimensional Tellurene and Tellurides for Broadband Photodetectors

• Published in: Small (Weinheim an der Bergstrasse, Germany) Germany), 2022-05, Vol.18 (20), p.e2200016-n/a
• Main Authors: Yan, Zihan, Yang, Hao, Yang, Zhuo, Ji, Chengao, Zhang, Guangyu, Tu, Yusong, Du, Guangyu, Cai, Songhua, Lin, Shenghuang
• Format: Article
• Language: English
• Subjects: Broadband; Chemical properties; Frequency response; Functional materials; heterostructures; Intermetallic compounds; Nanotechnology; optical and electronic properties; Optoelectronics; photodetectors; Photometers; tellurene; Tellurides; Thermal conductivity; Time response; Two dimensional materials
• ISSN: 1613-6810; 1613-6829
• DOI: 10.1002/smll.202200016

As with all stylish 2D functional materials, tellurene and tellurides possessing excellent physical and chemical properties such as high environmental stability, tunable narrow bandgap, and lower thermal conductivity, have aroused the great interest of the researchers. These properties of such materials also form the basis for relatively newfangled scholarly fields involving advanced topics, especially for broadband photodetectors. Integrating the excellent properties of many 2D materials, tellurene/telluride‐based photodetectors show great flexibility, higher frequency response or faster time response, high signal‐to‐noise ratio, and so on, which make them leading the frontier of photodetector research. To fully understand the excellent properties of tellurene/tellurides and their optoelectronic applications, the recent advances in tellurene/telluride‐based photodetectors are maximally summarized. Benefiting from the solid research in this field, the challenges and opportunities of tellurene/tellurides for future optoelectronic applications are also discussed in this review, which might provide possibilities for the realization of state‐of‐the‐art high‐performance tellurene/telluride‐based devices. Merits of tunable narrow bandgap, high environmental stability, and lower thermal conductivity have endowed 2D tellurene and tellurides significant potential in optoelectronics. This review gives an intriguing bottom‐to‐top organization from important electronic and optical properties of such materials and extends to their practical photodetector applications, and some challenges and opportunities for 2D Te‐based photodetectors are also concluded.