Piezoelectric effect on thermoelectric properties of ZnO based wurtzite materials

• Main Authors: Zhe-YongGong, 龔哲永
• Other Authors: Chuan-Pu Liu
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/ysvc6u

碩士 === 國立成功大學 === 材料科學及工程學系 === 106 === Due to the inseparable relation between thermoelectric properties and the carrier transportation, we consider piezoelectric effect can change thermoelectric properties. In this research, we determine the difference of the thermoelectric properties induced by the piezoelectric effect. This research will test this effect on three different materials: ZnO, MgZnO thin films and ZnO nanorods. The ZnO and MgZnO thin film grow on PET/ITO substrate by the sputtering and the ZnO nanorod arrays synthesize through the hydrothermal method. Following the synthesis is measurement of the thermal electric properties such as Seebeck coefficient and I-V characteristic. Then apply compressive and tensile strain on devices in difference bending situations and find out how piezoelectric effect changes thermoelectric properties. The results show that when the temperature range is around 300K~400K, piezoelectric effect affects thermoelectric properties. Basing on our results, we can consider about the probability of combination between piezoelectric effect and thermoelectric effect when we design thermoelectric devices and nanogenerators.