High-Performance (Na0.5K0.5)NbO3 Thin Film Piezoelectric Energy Harvester

Authors
Kim, Bo-YunSeo, In-TaeLee, Youn-SeonKim, Jin-SeongNahm, SahnKang, Chong-YunYoon, Seok-JinPaik, Jong-HooJeong, Young-Hun
Issue Date
2015-01
Publisher
WILEY
Citation
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, v.98, no.1, pp.119 - 124
Abstract
The pseudocubic structure of a (Na0.5K0.5)NbO3 (NKN) film grown on a Pt/Ti/SiO2/Si substrate changed to an orthorhombic structure when the film was transferred onto a polyimide substrate. Piezoelectric constant for the transferred NKN film increased considerably from 74 +/- 11 to 120 +/- 18pm/V because the crystal structure of the film had changed from pseudocubic to orthorhombic. A gold interdigitated electrode was deposited onto the transferred NKN film to synthesize a NKN piezoelectric energy harvester. The NKN piezoelectric energy harvester was poled before bending under a 100kV/cm DC electric field across the electrodes. When a strain of 0.85% and a strain rate of 4.05%/s were applied to the NKN piezoelectric energy harvester, it produced a maximum output voltage of 1.9V and a current of 38nA, corresponding to a power density of 2.89W/cm(3).
Keywords
POTASSIUM-SODIUM NIOBATE; ELECTRICAL-PROPERTIES; LOW-TEMPERATURE; NANOGENERATOR; CERAMICS; GROWTH; POTASSIUM-SODIUM NIOBATE; ELECTRICAL-PROPERTIES; LOW-TEMPERATURE; NANOGENERATOR; CERAMICS; GROWTH
ISSN
0002-7820
URI
https://pubs.kist.re.kr/handle/201004/125971
DOI
10.1111/jace.13238
Appears in Collections:
KIST Article > 2015
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