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• W2334683705 endingPage "14292" @default.
• W2334683705 startingPage "14286" @default.
• W2334683705 abstract "We demonstrated a single microwire photodetector first made using a VO2 microwire that exhibted high responsivity (Rλ) and external quantum efficiency (EQE) under varying light intensities. The VO2 nanowires/microwires were grown and attached on the surface of the SiO2/Si(100) substrate. The SiO2 layer can produce extremely low densities of long VO2 microwires. An individual VO2 microwire was bonded onto the ends using silver paste to fabricate a photodetector. The high-resolution transmission electron microscopy image indicates that the nanowires grew along the [100] axis as a single crystal. The critical parameters, such as Rλ, EQE, and detectivity, are extremely high, 7069 A W–1, 2.4 × 1010%, and 1.5 × 1014 Jones, respectively, under a bias of 4 V and an illumination intensity of 1 μW cm–2. The asymmetry in the I–V curves results from the unequal barrier heights at the two contacts. The photodetector has a linear I–V curve with a low dark current while a nonlinear curves was observed under varing light intensities. The highly efficient hole-trapping effect contributed to the high responsivity and external quantum efficiency in the metal–oxide nanomaterial photodetector. The responsivity of VO2 photodetector is 6 and 4 orders higher than that of graphene (or MoS2) and GaS, respectively. The findings demonstrate that VO2 nanowire/microwire is highly suitable for realizing a high-performance photodetector on a SiO2/Si substrate." @default.
• W2334683705 created "2016-06-24" @default.
• W2334683705 creator A5012597303 @default.
• W2334683705 creator A5031269040 @default.
• W2334683705 date "2014-07-28" @default.
• W2334683705 modified "2023-10-16" @default.
• W2334683705 title "Ultrahigh Responsivity and External Quantum Efficiency of an Ultraviolet-Light Photodetector Based on a Single VO₂ Microwire" @default.
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• W2334683705 doi "https://doi.org/10.1021/am503598g" @default.
• W2334683705 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25027392" @default.
• W2334683705 hasPublicationYear "2014" @default.
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