Novel mechano-luminescent sensors based on piezoelectric/electroluminescent composites

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Abstract

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.

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Jia, Y., Tian, X., Wu, Z., Tian, X., Zhou, J., Fang, Y., & Zhu, C. (2011). Novel mechano-luminescent sensors based on piezoelectric/electroluminescent composites. Sensors, 11(4), 3962ā€“3969. https://doi.org/10.3390/s110403962

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