Journal
FERROELECTRICS
Volume 488, Issue 1, Pages 148-153Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00150193.2015.1073092
Keywords
P(VDF-TrFE); thickness; switching characteristics; ultrathin film
Funding
- National Natural Science Foundation of China [51503121]
- Natural Science Foundation of Shanghai [13ZR1418200]
- Innovation Program of Shanghai Municipal Education Commission [15ZZ093]
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In this work, switching characteristics of poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) copolymer films are investigated over wide ranges of thickness. It is found that the thickness dependence of the coercive field is in accordance with the classical crystallization model. The leakage current shows a higher value of 140 nC/cm(2) as the thickness of P(VDF-TrFE) film is reduced to 50nm. In addition, an electroactive interlayer has been employed to improve the ferroelectric properties of P(VDF-TrFE) film. After more than 10(6) cycles of switching, the cell still has good polarization performance at both 25 and 60 degrees C even as the thickness of P(VDF-TrFE) film is down to 50nm.
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