Ordered Matter Science Research Center, and Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University , Nanjing 211189, P. R. China.
J Am Chem Soc. 2017 Oct 4;139(39):13903-13908. doi: 10.1021/jacs.7b07715. Epub 2017 Sep 15.
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][ReO] (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/cm), 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.
经典的有机铁电体聚偏二氟乙烯（PVDF）作为与全有机电子兼容的数据存储应用的有前途的候选材料引起了广泛关注。然而，其低结晶度、大矫顽场和剩余极化稳定性有限严重阻碍了其大规模集成。有鉴于此，我们展示了一种属于另一类典型有机铁电体的[Hdabco][ReO]（dabco = 1,4-二氮杂二环[2.2.2]辛烷）（1）的分子铁电体薄膜。值得注意的是，它不仅表现出最高的居里温度 499.6 K，而且在所有报道的分子铁电体中具有最快的 100k Hz 极化开关速度。结合较大的剩余极化值（约 9 μC/cm）、较低的矫顽电压（约 10 V）以及独特的多轴铁电性质，1 成为了在下一代柔性设备、可穿戴设备和仿生学中用于数据存储应用的有前途的可行替代品，可替代 PVDF。
