Piezoelectric materials allow for the interconversion between mechanical and electrical energy and find applications in diverse areas including as sensors, actuator, and high precision motors. Current state-of-the art piezoelectric materials are based on inorganic ceramics such as lead zirconate titanate (PbZr 1 -x Ti x O 3 , PZT) with large piezoelectric responses. However, these materials are brittle, require high processing temperatures, and may contain toxic and environmentally hazardous lead, which impose challenges for flexible and biocompatible technologies.