3-7 圧電薄膜を用いた振動エナジーハーベスターの特性評価(OS3 電池レス・デバイスのためのエネルギーハーベストの展開)

概要

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We fabricated piezoelectric vibration energy harvesters composed of PZT and lead-free KNN thin films on Si cantilevers and characterized the output voltage and power of those piezoelectric films. Both of the PZT and KNN films were deposited on Pt-coated Si substrates by rf-magnetron sputtering. The harvesters had a simple unimorph cantilever structure with the almost same dimensions, and the characteristics of power generation were examined. When we applied the acceleration of 10m/s^2 on the PZT and KNN energy harvesters, they generated the output power of 1.11 and 1.01μW at the resonant frequency under 10m/s^2, indicating lead-free KNN films are comparable to PZT films for the performance for power generation.
一般社団法人日本機械学会の論文
2011-09-25