Zero-Bias Visible to Near-Infrared Horizontal p-n-p TiO<sub>2</sub> Nanotubes Doped Monolayer Graphene Photodetector

Zehua Huang; Chunhui Ji; Luhua Cheng; Jiayue Han; Ming Yang; Xiongbang Wei; Yadong Jiang; Jun Wang

doi:10.3390/molecules24101870

Molecules (May 2019)

Zero-Bias Visible to Near-Infrared Horizontal p-n-p TiO<sub>2</sub> Nanotubes Doped Monolayer Graphene Photodetector

Zehua Huang,
Chunhui Ji,
Luhua Cheng,
Jiayue Han,
Ming Yang,
Xiongbang Wei,
Yadong Jiang,
Jun Wang

Affiliations

Zehua Huang: School of Optoelectronic Science and Engineering State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
Chunhui Ji: School of Optoelectronic Science and Engineering State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
Luhua Cheng: School of Optoelectronic Science and Engineering State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
Jiayue Han: School of Optoelectronic Science and Engineering State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
Ming Yang: School of Optoelectronic Science and Engineering State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
Xiongbang Wei: School of Optoelectronic Science and Engineering State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
Yadong Jiang: School of Optoelectronic Science and Engineering State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
Jun Wang: School of Optoelectronic Science and Engineering State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China

DOI: https://doi.org/10.3390/molecules24101870
Journal volume & issue: Vol. 24, no. 10
p. 1870

Abstract

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We present a p-n-p monolayer graphene photodetector doped with titanium dioxide nanotubes for detecting light from visible to near-infrared (405 to 1310 nm) region. The built-in electric field separates the photo-induced electrons and holes to generate photocurrent without bias voltage, which allows the device to have meager power consumption. Moreover, the detector is very sensitive to the illumination area, and we analyze the reason using the energy band theory. The response time of the detector is about 30 ms. The horizontal p-n-p device is a suitable candidate in zero-bias optoelectronic applications.

Published in Molecules

ISSN: 1420-3049 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Organic chemistry
Website: http://www.mdpi.com/journal/molecules

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