Gap States Assisted MoO3 Nanobelt Photodetector with Wide Spectrum Response
Citations Over TimeTop 10% of 2014 papers
Abstract
Molybdenum oxides have been widely investigated for their broad applications ranging from electronics to energy storage. Photodetectors based on molybdenum trioxide (MoO3), however, were seldom reported owing to their low conductivity and weak photoresponse. Herein we report a photodetector based on single MoO3 nanobelt with wide visible spectrum response by introducing substantial gap states via H2 annealing. The pristine MoO3 nanobelt possessed low electrical conductance and no photoresponse for nearly all visible lights. The H2 annealing can significantly improve the conductance of MoO3 nanobelt, and result in a good photodetector with wide visible spectrum response. Under illumination of 680 nm light, the photodetector exhibited high responsivity of ~56 A/W and external quantum efficiency of ~10200%. As corroborated by in situ ultraviolet photoelectron spectroscopy and X-ray photoelectron spectroscopy investigations, such strong wide spectrum photoresponse arises from the largely enriched gap states in the MoO3 nanobelt after H2 annealing.
Related Papers
- → Fabrication of Self-Powered Fast-Response Ultraviolet Photodetectors Based on Graphene/ZnO:Al Nanorod-Array-Film Structure with Stable Schottky Barrier(2017)129 cited
- → High responsivity ultraviolet photodetector realized via a carrier-trapping process(2010)120 cited
- → Synchronous Enhancement for Responsivity and Response Speed in In2Se3 Photodetector Modulated by Piezoresistive Effect(2019)36 cited
- → Experimental comparison between Nb2O5- and TiO2-based photoconductive and photogating GFET UV detector(2023)13 cited
- → Enhanced Responsivity of Photodetectors Realized via Impact Ionization(2012)26 cited