A flexible ultraviolet photodetector based on single crystalline MoO3 nanosheets

Qinghong Zheng; Jin Huang; Shilin Cao; Haili Gao

doi:10.1039/C5TC00850F

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A flexible ultraviolet photodetector based on single crystalline MoO₃ nanosheets†

Qinghong Zheng,*^a Jin Huang,^b Shilin Cao^a and Haili Gao^a

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* Corresponding authors

^a College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, People's Republic of China
E-mail: fafuzqh@163.com

^b Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, People's Republic of China

Abstract

Large scale two dimensional orthorhombic structured MoO₃ single crystalline belts with a bandgap of 3.28 eV were prepared by substrate-free physical vapor deposition. Ultra-thin MoO₃ nanosheets were exfoliated from the belt and transferred to a polyethylene terephthalate substrate. A flexible ultraviolet photodetector (UVPD) based on the single crystalline MoO₃ nanosheet was fabricated, and its optoelectronic response properties were investigated in detail. The UVPD has a high responsivity of 183 mA W⁻¹, a high on/off ratio of over two orders and a response speed below 1 s. Moreover, the flexible UVPD exhibits excellent stability and reproducibility under different mechanical deformations. The excellent operating characteristics make the UVPD a potential candidate for wearable UV meters, touch sensor panels, communication devices and UV imaging cameras.

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Article information

DOI: https://doi.org/10.1039/C5TC00850F
Article type: Paper
Submitted: 27 Mar 2015
Accepted: 10 Jun 2015
First published: 11 Jun 2015

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J. Mater. Chem. C, 2015,3, 7469-7475

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A flexible ultraviolet photodetector based on single crystalline MoO₃ nanosheets

Q. Zheng, J. Huang, S. Cao and H. Gao, J. Mater. Chem. C, 2015, 3, 7469 DOI: 10.1039/C5TC00850F

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Journal of Materials Chemistry C