Emerging Two‐Dimensional Tellurene and Tellurides for Broadband Photodetectors

Abstract

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.

Locally Spontaneous Dynamic Oxygen Migration on Biphenylene: A DFT Study

“…Graphene, a two-dimensional (2D) material that emerged in 2004, 1 has been one of the most popular and attention-grabbing 2D materials for many years due to its unique mechanical, electronic, and thermal properties. [2][3][4][5][6] Graphene has definitely triggered a research boom in 2D materials, which has led more and more researchers to explore new 2D materials, such as borophene, [7][8][9] silicene, [10][11][12][13] germanene, [14][15][16] tellurene, [17][18][19] etc., to obtain good applications in electronics, 19 biomedicine, 20,21 photoelectric detection, 18 etc. Recently, Fan et al synthesized a novel 2D allotrope of graphene by zipping together strings of 2,5-difluoro-p-phenylene on the Au(111) surface using a dehydrofluorination reaction, named biphenylene.…”

Enhanced Light–Tellurium Interaction through Evanescent Wave Coupling for High Speed Mid‐Infrared Photodetection

“…We fabricated another transistor with longer channel length to minimize the influence of the contact resistance, and its switching ratio was over 16, indicating performance comparable to those of similar reported devices. [ 45 ] The hole mobilities of the Te flake along with the x and y directions were 980.9 and 631.6 cm 2 V −1 s −1 at room temperature based on the calculation from the transfer curves (Figure 2b). The x and y directions represent the carrier collection direction along the x and y directions in Figure 2a, respectively.…”

“…Tellurium (Te) with great air stability has been reported and drawn much attention for optoelectronic devices in recent years, [41][42][43][44][45] which can be synthesized by low-cost solution method with large area and high quality. [42] Te possesses a thickness-dependent bandgap, which ranges from ≈0.35 eV (bulk) to ≈1 eV (monolayer).…”

2D Manganese Nanosheets with Optical-Limiting Behavior for Precision Instrument and Eye Protection

“…Materials science has shown great promise for applications in catalysis, sensing, and batteries in recent years. − As a branch of materials science, 2D nanomaterials exhibit excellent optical and chemical properties and have great innovation in applications such as optoelectronic devices, high-performance sensors, and ultrafast photonics. − Since the successful exfoliation of graphene, the research on carbon allotropes, such as carbon nanotubes, carbon nanofibers, and graphitic dienes, has exploded. − In addition, research on other main-group elements has been carried out, such as the successful preparation of silicene, tellurene, and antimonene, which have great promise in the fields of sensors, supercapacitors, and optics. − Lee et al reported the potential applications of 2D black phosphorus in medicine, especially in drug delivery and cell tracking . In 2020, Kuang et al reported the great potential of MXenes as photocatalysts for solar fuel production and biodegradation .…”