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.
Keywords: piezoelectric; mechano-luminescent sensors; composites
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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.
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(4):3962-3969.
Jia, Yanmin; Tian, Xiangling; Wu, Zheng; Tian, Xiaojuan; Zhou, Jiayi; Fang, Yunzhang; Zhu, Chenchen. 2011. "Novel Mechano-Luminescent Sensors Based on Piezoelectric/Electroluminescent Composites." Sensors 11, no. 4: 3962-3969.