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Gong M, Liu Q, Cook B, et al. All-Printable ZnO Quantum Dots/Graphene van der Waals Heterostructures for Ultrasensitive Detection of Ultraviolet Light. ACS Nano. 2017;11(4):4114-4123doi: 10.1021/acsnano.7b00805.
Gong, M., Liu, Q., Cook, B., Kattel, B., Wang, T., Chan, W. L., Ewing, D., Casper, M., Stramel, A., & Wu, J. Z. (2017). All-Printable ZnO Quantum Dots/Graphene van der Waals Heterostructures for Ultrasensitive Detection of Ultraviolet Light. ACS nano, 11(4), 4114-4123. https://doi.org/10.1021/acsnano.7b00805
Gong, Maogang, et al. "All-Printable ZnO Quantum Dots/Graphene van der Waals Heterostructures for Ultrasensitive Detection of Ultraviolet Light." ACS nano vol. 11,4 (2017): 4114-4123. doi: https://doi.org/10.1021/acsnano.7b00805
Gong M, Liu Q, Cook B, Kattel B, Wang T, Chan WL, Ewing D, Casper M, Stramel A, Wu JZ. All-Printable ZnO Quantum Dots/Graphene van der Waals Heterostructures for Ultrasensitive Detection of Ultraviolet Light. ACS Nano. 2017 Apr 25;11(4):4114-4123. doi: 10.1021/acsnano.7b00805. Epub 2017 Mar 24. PMID: 28328198.
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ACS Nano. 2017 Apr 25;11(4):4114-4123. doi: 10.1021/acsnano.7b00805. Epub 2017 Mar 24.

All-Printable ZnO Quantum Dots/Graphene van der Waals Heterostructures for Ultrasensitive Detection of Ultraviolet Light.

ACS nano

Maogang Gong, Qingfeng Liu, Brent Cook, Bhupal Kattel, Ti Wang, Wai-Lun Chan, Dan Ewing, Matthew Casper, Alex Stramel, Judy Z Wu

Affiliations

  1. Department of Physics and Astronomy, University of Kansas , Lawrence, Kansas 66045, United States.
  2. Department of Energy's National Security Campus , Kansas City, Missouri 64147, United States.

PMID: 28328198 DOI: 10.1021/acsnano.7b00805

Abstract

In ZnO quantum dot/graphene heterojunction photodetectors, fabricated by printing quantum dots (QDs) directly on the graphene field-effect transistor (GFET) channel, the combination of the strong quantum confinement in ZnO QDs and the high charge mobility in graphene allows extraordinary quantum efficiency (or photoconductive gain) in visible-blind ultraviolet (UV) detection. Key to the high performance is a clean van der Waals interface to facilitate an efficient charge transfer from ZnO QDs to graphene upon UV illumination. Here, we report a robust ZnO QD surface activation process and demonstrate that a transition from zero to extraordinarily high photoresponsivity of 9.9 × 10

Keywords: graphene; interface; nanohybrids; printable ultraviolet photodetectors; van der Waals heterostructures; zinc oxide quantum dots

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