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Gap States Assisted MoO3 Nanobelt Photodetector with Wide Spectrum Response

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 o... Full description

Journal Title: Scientific Reports (Nature Publisher Group) May 2014, p.4891
Main Author: Xiang, Du
Other Authors: Han, Cheng , Zhang, Jialin , Chen, Wei
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: E-ISSN: 20452322 ; DOI: 10.1038/srep04891
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title: Gap States Assisted MoO3 Nanobelt Photodetector with Wide Spectrum Response
format: Article
creator:
  • Xiang, Du
  • Han, Cheng
  • Zhang, Jialin
  • Chen, Wei
subjects:
  • X Rays
  • Spectrum Analysis
  • Molybdenum
  • Conductance
  • Oxides
  • Molybdenum
  • Energy Storage
  • Light Effects
  • Photoelectron Spectroscopy
  • Illumination
  • Spectroscopy
ispartof: Scientific Reports (Nature Publisher Group), May 2014, p.4891
description: 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.
language: eng
source:
identifier: E-ISSN: 20452322 ; DOI: 10.1038/srep04891
fulltext: fulltext_linktorsrc
issn:
  • 20452322
  • 2045-2322
url: Link


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titleGap States Assisted MoO3 Nanobelt Photodetector with Wide Spectrum Response
creatorXiang, Du ; Han, Cheng ; Zhang, Jialin ; Chen, Wei
ispartofScientific Reports (Nature Publisher Group), May 2014, p.4891
identifierE-ISSN: 20452322 ; DOI: 10.1038/srep04891
subjectX Rays ; Spectrum Analysis ; Molybdenum ; Conductance ; Oxides ; Molybdenum ; Energy Storage ; Light Effects ; Photoelectron Spectroscopy ; Illumination ; Spectroscopy
descriptionMolybdenum 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.
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titleGap States Assisted MoO3 Nanobelt Photodetector with Wide Spectrum Response
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abstractMolybdenum 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.
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