In:
Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 11, No. 12 ( 2023), p. 6361-6374
Kurzfassung:
One-dimensional (1D)/two-dimensional (2D) heterostructures offer attractive opportunities for developing high-performance gas sensors because of the unique built-in electric field at the hetero-interface, efficient charge separation and transportation, and synergetic properties of the 1D and 2D components. However, a relatively high operating temperature, insufficient gas sensitivity, and complex fabrication process present the key challenges for practical implementation. Here, we realize a p-type 1D/2D heterostructure consisting of Se belts and GeSe x O y nanosheets through a single-step synthesis governed by the exfoliation–nucleation process. A type II band alignment configuration is found in the heterostructure with an effective bandgap energy of ∼1.32 eV, which covers the complete visible light spectrum. The visible-light-driven optoelectronic NO 2 gas sensing performances are then investigated at room temperature. A ∼27.3% response magnitude towards 10 ppm NO 2 is achieved upon irradiation with red light, with a sub-ppb limit of detection, full reversibility, excellent selectivity, and 〉 3 months long-term stability, which is a significant improvement as a whole over those of reported 1D/2D heterostructure-based room temperature NO 2 sensors. This work paves the way for realizing mixed-dimensional heterojunction-based next-generation gas sensors in a facile and effective manner.
Materialart:
Online-Ressource
ISSN:
2050-7488
,
2050-7496
Sprache:
Englisch
Verlag:
Royal Society of Chemistry (RSC)
Publikationsdatum:
2023
ZDB Id:
2702232-8
Permalink