The classical organic ferroelectric, poly(vinylidene fluoride) (PVDF), has attracted much attention as a promising candidate for data storage applications compatible with all-organic electronics. However, it is the low crystallinity, the large coercive field, and the limited thermal stability of remanent polarization that severely hinder large-scale integration. In light of that, we show a molecular ferroelectric thin film of [Hdabco][ReO₄] (dabco = 1,4-diazabicyclo[2.2.2]octane) (1), belonging to another class of typical organic ferroelectrics. Remarkably, it displays not only the highest Curie temperature of 499.6 K but also the fastest polarization switching of 100k Hz among all reported molecular ferroelectrics. Combined with the large remanent polarization values (∼9 μC/cm²), the low coercive voltages (∼10 V), and the unique multiaxial ferroelectric nature, 1 becomes a promising and viable alternative to PVDF for data storage applications in next-generation flexible devices, wearable devices, and bionics.

中文翻译：

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居里温度最高，极化转换最快的多轴分子铁电体

作为与全有机电子产品兼容的数据存储应用的有前途的候选者，经典的有机铁电体聚偏二氟乙烯（PVDF）已引起了广泛的关注。但是，由于结晶度低，矫顽场大以及剩余极化的热稳定性有限，严重阻碍了大规模集成。有鉴于此，我们显示了[Hdabco] [ReO ₄ ]的分子铁电薄膜（dabco = 1,4-二氮杂双环[2.2.2]辛烷）（1），属于另一类典型的有机铁电体。值得注意的是，它不仅显示了最高的居里温度499.6 K，而且在所有已报道的分子铁电体中显示了最快的100k Hz极化转换。结合较大的剩余极化值（〜9μC/ cm²），低矫顽电压（〜10 V）和独特的多轴铁电特性1成为PVDF的有前途和可行的替代品，用于下一代柔性设备，可穿戴设备和仿生设备中的数据存储。