Direct Current Piezoelectric Energy Harvesting Based on Plasmon-Enhanced Solar Radiation Pressure

摘要

A piezoelectric energy generating device that produces electricity usingplasmon-enhanced solar radiation pressure (SRP) is developed. The SRP isgreatly enhanced on the operational region of the device with a unique craterlikestructure, and direct current is generated successfully on the device. Byoptimizing the material and thickness of top electrode, a maximum powerdensity of 396 μW cm~(?2) is obtained. In addition, by using Raman measurements,finite-difference time-domain simulation, and COMSOL Multiphysicsanalysis, it is confirmed that the SRP is greatly amplified on the operationalregion with the nanoscale surface roughness due to resonance between theincident light and surface plasmons. By increasing the rotational speed of anoptical chopper used to measure the change in the output characteristics ofthe device, and comparing this with the simulated result, it is found that theconstant charge produced by the piezoelectric effect arose due to the superpositionof charge phases in the device.