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Sensors 2011, 11(4), 3962-3969; doi:10.3390/s110403962

Novel Mechano-Luminescent Sensors Based on Piezoelectric/Electroluminescent Composites

1,* , 1
1 Department of Physics, Zhejiang Normal University, Jinhua, 321004, China 2 College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China 3 School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, China 4 ACCIS Group, Aerospace Engineering, Faculty of Engineering, University of Bristol, Tyndall Avenue, Bristol BS8 1TH, UK
* Author to whom correspondence should be addressed.
Received: 21 February 2011 / Revised: 17 March 2011 / Accepted: 31 March 2011 / Published: 1 April 2011
(This article belongs to the Section Physical Sensors)
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A high-sensitivity mechano-luminescent sensor was fabricated on the basis of piezoelectric/electroluminescent composites. The working principle of this mechano-luminescent sensor was elucidated by analyzing the relationship between the piezoelectric-induced charges and the electroluminescent effects. When a stress is applied on the piezoelectric layer, electrical charges will be induced at both the top and bottom sides of the piezoelectric layer. The induced electrical charges will lead to a light output from the electroluminescent layer, thus producing a mechano-luminescence effect. By increasing the vibration strength or frequency applied, the mechano-luminescence output can be obviously enhanced. Mechano-luminescence sensors have potential in smart stress-to-light devices, such as foot-stress-distribution-diagnosis systems and dynamic-load-monitors for bridge hanging cables.
Keywords: piezoelectric; mechano-luminescent sensors; composites piezoelectric; mechano-luminescent sensors; composites
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Jia, Y.; Tian, X.; Wu, Z.; Tian, X.; Zhou, J.; Fang, Y.; Zhu, C. Novel Mechano-Luminescent Sensors Based on Piezoelectric/Electroluminescent Composites. Sensors 2011, 11, 3962-3969.

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