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Van der Waals Integration of Bismuth Quantum Dots–Decorated Tellurium Nanotubes (Te@Bi) Heterojunctions and Plasma‐Enhanced Optoelectronic Applications
Author(s) -
Zhang Ye,
Zhang Feng,
Wu Leiming,
Zhang Yupeng,
Huang Weichun,
Tang Yanfeng,
Hu Lanping,
Huang Pu,
Zhang Xiuwen,
Zhang Han
Publication year - 2019
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201903233
Subject(s) - heterojunction , tellurium , bismuth , materials science , quantum dot , van der waals force , optoelectronics , nanotechnology , plasma , chemistry , molecule , physics , quantum mechanics , organic chemistry , metallurgy
Van der Waals (vdW)‐integrated heterojunctions have been widely investigated in optoelectronics due to their superior photoelectric conversion capability. In this work, 0D bismuth quantum dots (Bi QDs)‐decorated 1D tellurium nanotubes (Te NTs) vdW heterojunctions (Te@Bi vdWHs) are constructed by a facile bottom‐up assembly process. Transient absorption spectroscopy suggests that Te@Bi vdWH is a promising candidate for new‐generation optoelectronic devices with fast response properties. The subsequent experiments and density functional theory calculations demonstrate the vdW interaction between Te NTs and Bi QDs, as well as the enhanced optoelectronic characteristics owing to the plasma effects at the interface between Te NTs and Bi QDs. Moreover, Te@Bi vdWHs‐based photodetectors show significantly improved photoresponse behavior in the ultraviolet region compared to pristine Te NTs or Bi QDs‐based photodetectors. The proposed integration of vdWHs is expected to pave the way for constructing new nanoscale heterodevices.