Novel Mechano-Luminescent Sensors Based on Piezoelectric/Electroluminescent Composites

Sensors

Yanmin Jia²  Xiangling Tian²  Zheng Wu¹  Xiaojuan Tian²  Jiayi Zhou²  Yunzhang Fang² 

[1] College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua, 321004, China; E-Mail:;Department of Physics, Zhejiang Normal University, Jinhua, 321004, China; E-Mails:

关键词: piezoelectric;    mechano-luminescent sensors;    composites;   

DOI  :  10.3390/s110403962

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.