File Download

There are no files associated with this item.

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

백정민

Baik, Jeong Min
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

Highly-sensitive and highly-correlative flexible motion sensors based on asymmetric piezotronic effect

Author(s)
Lee, Jae WonYe, Byeong UkWang, Zhong LinLee, Jong-LamBaik, Jeong Min
Issued Date
2018-09
DOI
10.1016/j.nanoen.2018.06.059
URI
https://scholarworks.unist.ac.kr/handle/201301/24733
Fulltext
https://www.sciencedirect.com/science/article/pii/S2211285518304543?via%3Dihub
Citation
NANO ENERGY, v.51, pp.185 - 191
Abstract
This paper describes two highly-sensitive flexible motion sensors (piezoelectric nanogenerators and ultraviolet light emitting diodes based flexible GaN) based on asymmetric polarization created across flexible GaN film and very high correlations of the sensors for precise motion measurement. The operation mechanism is based on piezotronic effect using polarization charges at the interface for tuning the electronic and optoelectronic processes. The nanogenerator showed very high sensitivity (S = 93 at 0.45% under concave bending) and the convex bending led to the decrease of the sensitivity to 24. The electroluminescence intensity also almost linearly decreased with the change of the bending direction, clearly shown in the confocal scanning electroluminescence microscopy images with the bending motion. The two sets of measures showed very high correlations (R-2 = 0.98 and 0.96 under concave and convex bending, respectively) with very sensitive directional information. This approach makes to recognize the direction of bending as well as to measure the magnitude of the strain for realizing multi-functional, motion detection sensing devices.
Publisher
Elsevier BV
ISSN
2211-2855
Keyword (Author)
Asymmetric polarizationPiezotronic effectHigh-correlationNanogeneratorMotion sensor
Keyword
STRAIN SENSORENHANCED PERFORMANCEGALLIUM NITRIDEELECTRONIC SKINLARGE-AREAFIBERGANNANOGENERATORSTRANSPARENTPRESSURE

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.