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Nowadays for the Piezoelectric sensing are is mostly used ceramics. The earliest one was Titanate. The three most popular piezoelectric materials are Zinc oxide (ZnO), Aluminum nitride (AIN) and lead-zirconite-titanium oxides what is known as PZT.
Piezoelectric materials are usually sensitive to temperature changes. For example quarts loose quartz looses sensitivity if the temperature drops with a slope of -0,016%/Celsius. With PVCF films and materials the sensitivity changes when the temperature is on the higher or lower side of 40 Celsius.
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http://en.wikipedia.org/wiki/Piezoelectricity
https://www.americanpiezo.com/piezo-theory/ceramics.html
https://www.americanpiezo.com/knowledge-center/piezo-theory/new-materials.html
Jacob Fraden: Handbook of Modern Sensors (Physics, Designs and Applications), Fourth Edition, Springer
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