More details about microstructure results (Fig. S1.), temperature dependent dielectric properties (Fig. S2.), switching properties (Fig. S3.), dielectric properties (Fig. S4.), thermal stability (Fig. S5.), frequency stability (Fig. S6.), fatigue properties (Fig. S7.) of all PLHO-x films, and temperature dependent XRD results of PLHO-x (x= 0 and 0.04) (Fig. S8.).