In:
Journal of Nanoelectronics and Optoelectronics, American Scientific Publishers, Vol. 16, No. 1 ( 2021-01-01), p. 38-47
Abstract:
The interest in investigating hollow core–shell nanostructures was stimulated by their intrinsic advantage in light absorption and photocarrier separation for promising applications in photoelectrochemical devices. Here, SnO 2 @TiO 2 core–shell hierarchical tubular structure was designed and prepared via a low-temperature solution route using carbon nanofibers as templates. The heterostructure consists of SnO 2 nanotubes and TiO 2 nanocones, which facilities photocarrier separation and transport by built-in electric field at their interface, and direct transport path served by SnO 2 nanotubes. The large specific surface area was also believed to contribute to improve performance by providing more active sites for chemical reactions. After assembling into a photoelectrochemical-type ultraviolet photodetector, the detector exhibits a high short-circuit photocurrent density of 870 μ A cm –2 under ultraviolet illumination (λ = 365 nm) of 35 mW cm –2 without bias voltage. The photosensitivity can reach up to 3781, and the feature response time was in microseconds, 33 ms for rise process and 13 ms for decay process. It is believed that this structure with combined advantageous features is extendable to other photoelectrochemical cases, such as dye-sensitized solar cells and artificial photosynthesis.
Type of Medium:
Online Resource
ISSN:
1555-130X
DOI:
10.1166/jno.2021.2902
Language:
English
Publisher:
American Scientific Publishers
Publication Date:
2021
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