Abstract
The effect of testing temperature and storage period on the polarization fatigue properties of poly (vinylidene fluoride-trifluoroethylene) (P(VDF–TrFE)) ultrathin film devices were investigated. The experimental results show that, even after stored in air for 150 days, the relative remanent polarization () of P(VDF–TrFE) of ultrathin films can keep at a relatively high level of 0.80 at 25 °C and 0.70 at 60 °C. To account for this result, a hydrogen fluoride (HF) formation inhibition mechanism was proposed, which correlated the testing temperature and the storage period with the microstructure of P(VDF–TrFE) molecular chain. Moreover, a theoretical model was constructed to describe the polarization fatigue evolution of P(VDF–TrFE) samples.
Highlights
In recent years, advancements in flexible electronics have enabled the fabrication of highly sensitive devices for wearable and portable devices
Poly(vinylidene fluoride-trifluoroethylene) (P(VDF–TrFE)) have some outstanding advantages, such as high flexibility, high toughness, good workability, low cost, and so on. It has been widely applied in the ferroelectric random access memory (FeRAM), printed electronics, and wearable devices [6,7,8]
In order to investigate the temporal stability of P(VDF–TrFE) ultrathin film capacitors, the Pr/Pr(0) of LC1–LC4 samples were measured at 25 ◦C and 60 ◦C
Summary
Advancements in flexible electronics have enabled the fabrication of highly sensitive devices for wearable and portable devices. Recent efforts in the miniaturization of memory devices have contributed to increasingly flexible and portable devices [1,2,3,4,5]. Poly(vinylidene fluoride-trifluoroethylene) (P(VDF–TrFE)) have some outstanding advantages, such as high flexibility, high toughness, good workability, low cost, and so on. It has been widely applied in the ferroelectric random access memory (FeRAM), printed electronics, and wearable devices [6,7,8]. For low voltage operation of flexible devices, consuming less energy, it is essential to fabricate polymer films as thin as possible. The influencing factors of P(VDF–TrFE) ultrathin film were reported, including temperature [7,9], materials of the electrode [10,11], thickness of films [12,13], switching cycles [14] and so on
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