| 초록 |
The high-performance flexible piezoelectric nanogenerator was demonstrated using a piezoelectric single crystal PMN-PZT thin film which was grown via the Solid-State Crystal Growth (SSCG) method. The flexible PMN-PZT energy harvesting device converts biomechanical energy into electrical energy with a voltage of up to 100V and a current of 20μA. Also, research has been conducted on the optimization of circuit design to improve the energy transfer efficiency from flexible energy harvesters to electronic devices. In this study, we developed a reconfigurable rectifying circuit system consisting of a flexible piezoelectric nanogenerator, low-loss active rectifier, and reconfigurable capacitor charger array, which can transfer 4 times higher electric energy to an external load compared to a conventional rectifying circuit. Finally, in order to operate the portable handheld electronics, we built a flexible PMN-PZT nanogenerator into the combat boot to create a self-powered military boot. The self-powered military boots generated output signals of up to 12V and 1.2μA from walking and running motion, which was enough to turn on the light emitting diodes (LEDs) and liquid crystal display (LCD) directly. |
