Interest of binary PMMA/P(VDF–TrFE) blend thin films

Thin films of binary amorphous PMMA–ferroelectric P(VDF–17 mol% TrFE) copolymer have been produced by spin-coating on Ti-covered silicon wafers. Thermal, structural, dielectric, ferroelectric and pyroelectric properties were investigated as a function of PMMA content up to 10 wt%. If functional properties slightly decrease with increasing PMMA content, both the adhesion of such binary-copolymer thin films on metal electrodes and the reliability of as-grown devices can be dramatically improved. 1–2 wt% PMMA-based binary blends appear as very promising alternative materials for pyroelectric applications.