AUTHOR=Yin Hong , Li Huaiyu , Yu Xiang-xiang , Cao Minglei 

TITLE=Design of Sb2Te3 nanoblades serialized by Te nanowires for a low-temperature near-infrared photodetector

JOURNAL=Frontiers in Chemistry

VOLUME=Volume 10 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2022.1060523

DOI=10.3389/fchem.2022.1060523

ISSN=2296-2646

ABSTRACT=The dangling bond on the surface of bulk materials makes it difficult for a physically contacted heterojunction to form an ideal contact. Based on this, periodic epitaxial junctions based on Sb2Te3 nanoblades serialized by Te nanowires (Sb2Te3/Te) were fabricated by a one-step hydrothermal epitaxial growth method. X-ray diffraction and electron microscope reveal the as-prepared product has good crystal shape and heterojunction construction, which are beneficial for the separation of photogenerated carriers and leads to a fast response. When the Sb2Te3/Te composite is denoted as a photodetector, it shows superior light response performance. Electrical analysis shows that the photocurrent of the as-fabricated device declines with a rising temperature from 10K to 300K at 980 nm light illumination. The responsivity and detectivity are estimated to be 9.5×1011 μA W-1 and 1.22×1011 Jones at 50K, respectively, which are better than those of other Te-based photodetector devices. This study can suggest that the as-constructed NIR photodetector may have prospect application in low-temperature optoelectronic devices.