PMN-PT単結晶を用いたエレクトレットに強化される焦電発電に関する研究

抄録

This study presents our recent progress on electret-enhanced pyroelectric energy harvesting by utilizing single crystal Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-PT). With the help of quasi-permanent charge of electret and thermal response of ferroelectric crystal, the electrical field can be synchronized with temperature variation inside the pyroelectric material to harvest unsteady thermal energy. PMN-PT single crystal is chosen for this prototype for its outstanding properties in high thermal sensitivity around room temperature, low electrical leakage in low-frequency operation, and low coercive field. Output power density over 1 mJ/cm3/ cycle can be expected with temperature fluctuation of 5 °C.