Development of a micro vibration energy harvesting device using silicon dioxide electret film including alkali ions

这项研究的重点是一种新开发的驻极体薄膜，它是由含钾离子的二氧化硅制成的。我们进行了充电特性控制实验，发现(1)充电电压可控，(2)充电结束检测是可能的，(3)充电电压是可测量的，(4)最大充电电压超过400V。我们还利用驻极体方法制作了振动能量采集装置，对发光二极管进行了0.85微瓦的照射。此外，我们还对驻极体薄膜进行了加速老化试验，估算了-1dB电压衰减时间，结果表明，在室温下充电电压可以保持在30000年以上。

This research focuses on a newly developed electret film that is made of silicon dioxide including potassium ions. We conducted experiments that aim control of charging property, and found that (1) the charging voltage is controllable, (2) the charging end detection is possible, (3) the charging voltage is measureable using electrostatic actuators, and (4) the maximum charging voltage is over 400V. We also fabricated a vibration energy harvesting device using the electret method and demonstrated LED illumination by 0.85 micro watts.In addition, we examined accelerated aging tests of the electret film and evaluated -1dB voltage decay time; resulting in the charging voltage will be maintained over 30000 year at room temperature.