Meng Xiao, Gorbunov Andrey V, Christian Roelofs W S, Meskers Stefan C J, Janssen René A J, Kemerink Martijn, Sijbesma Rint P
Laboratory of Macromolecular and Organic Chemistry Eindhoven University of Technology PO Box 513 Eindhoven MB 5600 The Netherlands.
Department of Applied Physics Eindhoven University of Technology PO Box 513 Eindhoven MB 5600 The Netherlands.
J Polym Sci B Polym Phys. 2017 Apr 1;55(8):673-683. doi: 10.1002/polb.24318. Epub 2017 Feb 18.
We explore a new approach to organic ferroelectric diodes using a benzene-tricarboxamide (BTA) core connected with C10 alkyl chains to pyrrole groups, which can be polymerized to provide a semiconducting ferroelectric material. The compound possesses a columnar hexagonal liquid crystalline (LC) phase and exhibits ferroelectric switching. At low switching frequencies, an additional process occurs, which leads to a high hysteretic charge density of up to ∼1000 mC/m. Based on its slow rate, the formation of gas bubbles, and the emergence of characteristic polypyrrole absorption bands in the UV-Vis-NIR, the additional process is identified as the oxidative polymerization of pyrrole groups, enabled by the presence of amide groups. Polymerization of the pyrrole groups, which is essential to obtain semiconductivity, is limited to thin layers at the electrodes, amounting to ∼17 nm after cycling for 21 h. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. , , 673-683.
我们探索了一种用于有机铁电二极管的新方法，该方法使用与吡咯基团相连的C10烷基链的苯三羧酰胺（BTA）核心，其可以聚合以提供一种半导体铁电材料。该化合物具有柱状六方液晶（LC）相并表现出铁电开关特性。在低开关频率下，会发生一个额外的过程，这会导致高达约1000 mC/m的高滞后电荷密度。基于其缓慢的速率、气泡的形成以及在紫外-可见-近红外光谱中特征性聚吡咯吸收带的出现，该额外过程被确定为吡咯基团的氧化聚合，这是由酰胺基团的存在所促成的。吡咯基团的聚合对于获得半导体特性至关重要，它仅限于电极处的薄层，在循环21小时后厚度约为17 nm。© 2017威利期刊公司。《聚合物科学杂志》，B辑：聚合物物理学，，673 - 683。
