Due to the ability of mechanical energy converted to electrical energy, flexible piezoelectric energy harvesters have significant attention in recent years. In this current study, we designed and developed trimetallic oxide-based samarium zinc cobalt oxides, which were prepared using the co-precipitation method. The prepared material was fabricated using a solution casting method with 15% poly (vinylidene fluoride) (PVDF) to obtain a thin film of flexible piezoelectric sensor devices (FPSDs) SmxZn1-xCoO3/PVDF which was characterized by various analytical characterizations. Piezoelectrical characterizations were conducted on the fabricated (FPSDs) such as PVDF and SmxZn1-xCoO3/PVDF, by applying different dynamic forces. The obtained results clearly show that the output voltage of SmxZn1-xCoO3/PVDF improved, (33.3%) more than that of PVDF at 1 N force. Using finger tapping force on the surface of SmxZn1-xCoO3/PVDF FPSD to charge the capacitor, and it reached 245 mV within 16 s, then the light-emitting diodes (LEDs) glowed under amplification. Finally, the fabricated thin film was utilized to control the actions like the ‘jump’ of T-REX and ‘fly’ of flapping bird gaming interfaces using finger tapping. These optimistic results confirm that our fabricated FPSD is capable of energy-harvesting applications and self-powered smart IoT devices and so on.