Control of intrinsic polarity for work function modulation of polyvinylidene fluoride crystalline phases

Ferroelectric polymers with high flexibility and inherent piezo- pyro-electric properties have gained tremendous importance for next-generation wearable electronics. In this context, we investigate the intrinsic polarity mediated work function modulation in α-, γ-, β-crystalline phases of a ferroelectric polymer, namely, polyvinylidene fluoride. A wide range surface potentials (i.e., −5 to −70 V) were observed depending upon crystalline polymorph their morphologies. For example, nucleation electroactive γ- β-phases, reduction spherulite size is comparison its α-counterpart. Ultraviolet photoelectron spectroscopy was employed realize effect potential on valence bands spectrum. particular, non-electroactive α-phase (φα ∼ 5.09 eV) significantly increased when it converted into γ (φγ 5.99 β (φβ 7.39 phases. The advantage variation shown by synergistic charge generation as result contact electrification single active material-based polar interfaces different functions.