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- W2807579810 abstract "An interfacial-gated graphene phototransistor sensitized by silicon substrate with an ultrathin 3-nm Al <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sub> O <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> dielectric layer is demonstrated. When applying gate voltages larger than a certain threshold, the phototransistor exhibits a photo-induced switching-on behavior, giving rise to its capacity of detecting light with the ultralow power of 470 pW, with a high responsivity of 1.4 × 10 <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>4</sup> A/W. The temporal measurements unveil a fast photoresponse speed with a rising time of 2 μs. The novel channel on-state trigged by light was not observed in a control device with 16-nm Al <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sub> O <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> . The difference of transfer characteristics in the dark and under illumination is assigned mainly to the photo-assisted modification of the silicon depletion region." @default.
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- W2807579810 date "2018-07-01" @default.
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- W2807579810 title "Enhanced Photoresponse in Interfacial Gated Graphene Phototransistor With Ultrathin Al<sub>2</sub>O<sub>3</sub> Dielectric" @default.
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- W2807579810 doi "https://doi.org/10.1109/led.2018.2843804" @default.
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