Light-induced pyroelectric effect as an effective approach for ultrafast ultraviolet nanosensing

Zhaona Wang, Ruomeng Yu, Caofeng Pan, Zhaoling Li, Jin Yang, Fang Yi and Zhong Lin Wang ()
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Zhaona Wang: School of Materials Science and Engineering, Georgia Institute of Technology
Ruomeng Yu: School of Materials Science and Engineering, Georgia Institute of Technology
Caofeng Pan: Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences
Zhaoling Li: School of Materials Science and Engineering, Georgia Institute of Technology
Jin Yang: School of Materials Science and Engineering, Georgia Institute of Technology
Fang Yi: School of Materials Science and Engineering, Georgia Institute of Technology
Zhong Lin Wang: School of Materials Science and Engineering, Georgia Institute of Technology

Nature Communications, 2015, vol. 6, issue 1, 1-7

Abstract: Abstract Zinc oxide is potentially a useful material for ultraviolet detectors; however, a relatively long response time hinders practical implementation. Here by designing and fabricating a self-powered ZnO/perovskite-heterostructured ultraviolet photodetector, the pyroelectric effect, induced in wurtzite ZnO nanowires on ultraviolet illumination, has been utilized as an effective approach for high-performance photon sensing. The response time is improved from 5.4 s to 53 μs at the rising edge, and 8.9 s to 63 μs at the falling edge, with an enhancement of five orders in magnitudes. The specific detectivity and the responsivity are both enhanced by 322%. This work provides a novel design to achieve ultrafast ultraviolet sensing at room temperature via light-self-induced pyroelectric effect. The newly designed ultrafast self-powered ultraviolet nanosensors may find promising applications in ultrafast optics, nonlinear optics, optothermal detections, computational memories and biocompatible optoelectronic probes.

Date: 2015
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DOI: 10.1038/ncomms9401

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