Abstract
Ferroelectric poly(vinylidene fluoride-hexafluoropropylene) (PVDF/HFP) thin films were prepared through a solution coating approach on aluminum-coated silicon substrates. The crystalline phase and morphology of the obtained PVDF/HFP thin films strongly depended on the drying temperature for the spin-coated films and chemical additives. When magnesium nitrate hexahydrate (Mg(NO 3) 2·6H 2O) was introduced into the solution precursor, dominant β phase, the desired ferroelectric phase, was formed in the thin films. Their ferroelectric and piezoelectric properties were investigated. The results indicate that our methods have overcome a critical barrier for integrating ferroelectric PVDF/HFP thin films for device applications.
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