Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics , Southeast University , Nanjing 211189 , People's Republic of China.
Ordered Matter Science Research Center , Nanchang University , Nanchang 330031 , People's Republic of China.
J Am Chem Soc. 2018 Jul 5;140(26):8051-8059. doi: 10.1021/jacs.8b04600. Epub 2018 Jun 20.
Though dominating most of the practical applications, inorganic ferroelectric thin films usually suffer from the high processing temperatures, the substrate limitation, and the complicated fabrication techniques that are high-cost, energy-intensive, and time-consuming. By contrast, molecular ferroelectrics offer more opportunities for the next-generation flexible and wearable devices due to their inherent flexibility, tunability, environmental-friendliness, and easy processability. However, most of the discovered molecular ferroelectrics are uniaxial, one major obstacle for improving the thin-film performance and expanding the application potential. In this Perspective, we overview the recent advances on multiaxial molecular ferroelectric thin films, which is a solution to this issue. We describe the strategies for screening multiaxial molecular ferroelectrics and characterizations of the thin films, and highlight their advantages and future applications. Upon rational and precise design as well as optimizing ferroelectric performance, the family of multiaxial molecular ferroelectric thin films surely will get booming in the near future and inject vigor into the century-old ferroelectric field.
尽管无机铁电薄膜在大多数实际应用中占据主导地位，但它们通常存在加工温度高、基底限制以及复杂的制造技术等问题，这些技术成本高、能源密集且耗时。相比之下，由于分子铁电体具有固有柔韧性、可调谐性、环保性和易于加工性，为下一代柔性和可穿戴设备提供了更多机会。然而，大多数已发现的分子铁电体是单轴的，这是提高薄膜性能和扩大应用潜力的主要障碍之一。在本观点中，我们综述了多轴分子铁电薄膜的最新进展，这是解决这一问题的方法。我们描述了筛选多轴分子铁电体和薄膜特性的策略，并强调了它们的优势和未来应用。通过合理和精确的设计以及优化铁电性能，多轴分子铁电薄膜家族必将在不久的将来蓬勃发展，并为百年铁电领域注入活力。
