The paper is aimed to study the recent progress on lead-free piezoelectric materials, focusing on synthesis and various properties such
as structural, electrical and optical of them. Lead zirconate titanate (Pb (ZrxTi1-x) O3, PZT) and its associated solid solutions are
extensively used in several memory devices, sensors, actuators, and transducers in this era. The toxic nature of lead (or lead oxide)
creates health and environmental problems. With the environmental concerns, researchers are very much interested in finding out
environmental-friendly lead-free materials, which can substitute the said toxic materials with the same industrial applications with
high-efficiency situations. Various classes of materials are now under investigation by several researchers, considered as highly
potential alternatives to the above said toxic materials. The perovskite structures such as pure Bismuth Sodium Titanate (BNT), its
binary and ternary solid solution systems along with their structural, electrical, and optical properties are reviewed in this paper. The
observation reveals that various lead-free material compositions illustrate stability in piezoelectric results, even if it is not matching
completely with the performance of lead-based material. It motivates active research on this subject matter, i.e., lead-free materials to
overcome lead-based materials, cited herewith. This has stimulated us to analyze the function of lead-free material with a vision that it
would provide further ignition for a wide range of industrial applications to modern scientists, continuing research in this field.