Improved photoresponse performances of V₂O₅ and rGO

Abstract

The vanadium pentoxide nanowires (V₂O₅, several microns) have been manufactured via solution method for photodetectors. For further to improve the photoelectric performance, a hybrid nanostructure of V₂O₅/graphene oxide (GO) and V₂O₅/reduced graphene oxide (rGO) was adopted. Besides that, the photoelectric performance of (V₂O₅, V₂O₅/GO, V₂O₅/rGO) were measured, they were made into a form of composite paper with a wavelength of 532 nm laser irradiation, as the incident light power increases at room temperature, the photocurrent increases, especially V₂O₅/rGO (50 μA, 10 mA), which is 10 times as much as V₂O₅ (4.12 μA, 13 mA), and 5 times as much as V₂O₅/GO (9.8 μA, 10 mA). It’s ascribed to the dispersion of rGO (GO) layer between the build-up of V₂O₅, improving the build-up between them, and the excellent electrical conductivity of rGO layer can rapidly move the photo-generated carriers, thereby greatly increasing the photocurrent density. These results pave an effective approach to further improve the practical application of V₂O₅ in photodetection.

Keywords:

• V₂O₅
• graphene
• hybrid nanostructure
• photodetection

Acknowledgements

This work was supported by the Program for Changjiang Scholars and Innovative Research Team in University (IRT 17R91), National Basic Research Program of China (2015CB921103), the Grants from National Natural Science Foundation of China (No. 11874316 and 11474244), the Innovative Research Team in University (IRT13093), the National Natural Science Foundation of China (51772255), and Science and Technology Program of Xiangtan University Funding (No. CXY-ZD20172002). Thanks to Xiangtan University for funding.