Highly Oriented Organic Ferroelectric Films with Single-Crystal-Level Properties from Restrained Crystallization

• DOI: 10.1021/acs.cgd.1c01176
• Publication Date: 2022-02-22T21:42:35Z
• Authors: Yifan Yuan; Yuanyuan Ni; Xuanyuan Jiang; Yu Yun; Jing Li; Xiaoshan Xu
• Keywords: Crystal (programming language)

Device applications often require thin film growth with quasi-two-dimensional morphology and crystallization, which are not always compatible. In this work, we exploit the method of low-temperature deposition followed by restrained crystallization (LDRC) in crystalline organic molecular films, tend to grow three-dimensionally random orientations. We demonstrate that for 2-methylbenzimidazole, a ferroelectric tends crystallize spherulites, films can be grown using LDRC highly oriented polar axes single-crystal-level properties. The process was shown occur during post-deposition annealing situ electrical measurements. limited diffusion, low nucleation density, activation energy were found critical formation plate-shaped films. These results mark an important step elucidating as effective general approach fabricating balanced crystallinity applications.