Abstract
A photoelectric switch with fast response to visible light (<200 μs), suitable photosensitivity and excellent repeatability is proposed based on the ultralong single crystalline V₂O₅ nanobelt, which are synthesized by chemical vapor deposition and its photoconductive mechanism can well be explained by small polaron hopping theory. Our results reveal that the switch has a great potential in next generation photodetectors and light-wave communications.
Highlights
Generation electronic and photoelectronic systems require the elements with smaller size, higher efficiency, and less energy consumption
The synthesized products were characterized by a field emission scanning electron microscope (FE-SEM)(Hitachi S4800) and a transmission electron microscope (Tecnai G2 F20 U-TWIN) equipped with selected-area electron diffraction (SAED)
A visible light photoelectric switch has been investigated based on the centimeter-scale single crystalline V2O5 nanobelts fabricated by chemical vapor deposition (CVD), in which the Vanadium powder was used for making the fabrication easier, timesaving and less harmful
Summary
Generation electronic and photoelectronic systems require the elements with smaller size, higher efficiency, and less energy consumption. A good photoelectric switch should meet requirements in three aspects of photosensitivity, photoresponse speed and repeatability. Various one-dimensional (1D) metal-oxide nanostructures such as ZnO, SnO2, Ga2O3, Cu2O, Fe2O3, In2O3, CdO and CeO2 have been used to fabricate photoelectric switch for different wavelengths, especially for visible light because of the easiness to get economical light source, the above 1D metal-oxide nanostructures under the visible light irradiation reach only a photoresponse time from 20 millisecond (ms) to 500 second (s) [3], limiting their practical application to a large extent. It is necessary to explore higher-performance photoelectric switch with shorter response time to visible light, based on new nanostructure materials with a desired size
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