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Abstract
To enable the design of more intuitive product user interfaces, the prospects of matching piezoelectric touch sensors with flexible organic light emitting diode (OLED) technology are investigated. Low stiffness piezoelectric composite sensors, combining piezoelectric Pb(Zr,Ti)O3 powder with a polymer matrix, are prepared and compared to existing ceramic and polymer sensors. The piezoelectric sensitivity per stiffness of these piezoelectric composites can be tailored by adapting the polymer matrix to the stiffness required by the OLED, while retaining a relatively high sensitivity. Concurrently, the relatively low energy output of these flexible piezoelectric sensors can be increased through optimized sensor design.
Acknowledgments
The authors acknowledge the Max Planck Institute for Polymer Research in Mainz, Germany for the use of their facility for hysteresis measurements. Furthermore, the authors are grateful to Ferroperm Piezoceramics for providing PZ27 references, Esstech, Inc. for providing UDMA monomers, accelerator and photoinitiator and Morgan Electro Ceramics for providing the PZT507 and PZT5A4 powder used in this research.
Funding
This work was made possible thanks to a research grant from the European Commission, FP7 NMP program, under grant no. 310311.