期刊
SENSORS
卷 12, 期 1, 页码 534-548出版社
MDPI AG
DOI: 10.3390/s120100534
关键词
pyroelectricity; thermal energy; temperature variation rate; electrode
资金
- National Science Council of Taiwan [NSC 100-2221-E-150-048]
- Common Lab for Micro/Nano Science and Technology at the National Formosa University
This study proposes trenching piezoelectric (PZT) material in a thicker PZT pyroelectric cell to improve the temperature variation rate to enhance the efficiency of thermal energy-harvesting conversion by pyroelectricity. A thicker pyroelectric cell is beneficial in generating electricity pyroelectrically, but it hinders rapid temperature variations. Therefore, the PZT sheet was fabricated to produce deeper trenches to cause lateral temperature gradients induced by the trenched electrode, enhancing the temperature variation rate under homogeneous heat irradiation. When the trenched electrode type with an electrode width of 200 mu m and a cutting depth of 150 mu m was used to fabricate a PZT pyroelectric cell with a 200 mu m thick PZT sheet, the temperature variation rate was improved by about 55%. Therefore, the trenched electrode design did indeed enhance the temperature variation rate and the efficiency of pyroelectric energy converters.
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