Qiu Xinxia, Xu Mingsheng, Cong Chunxiao, Qiu Zhi-Jun, Hu Laigui, Liu Ran
School of Information Science and Technology, Fudan University, Shanghai 200433, China.
Nanomaterials (Basel). 2024 Nov 28;14(23):1920. doi: 10.3390/nano14231920.
Though much progress has been achieved in the discovery of new molecular ferroelectrics in recent years, practical applications and related physics are still rarely explored due to the difficulty in high-quality film production and patterning issues. Single-crystalline films and patterns are in high demand for high device performance. Through a template-assisted space-confined strategy, herein, ordered single-crystalline nanowire patterns and optoelectronic devices of a semiconducting molecular ferroelectric (SMF), hexane-1,6-diammonium pentaiodobismuth (HDA-BiI), were successfully demonstrated. The coupling of semiconducting and ferroelectric polarization of the SMF devices enables a broadband self-powered photodetection from ultraviolet to visible light, as well as polarization-tunable photoresponsivity. These may open an avenue for high-performance SMF optoelectronic memory devices with low cost and flexibility.
尽管近年来在新型分子铁电体的发现方面取得了很大进展，但由于高质量薄膜制备困难和图案化问题，其实际应用和相关物理研究仍很少被探索。高质量单晶薄膜和图案对于高性能器件至关重要。本文通过模板辅助的空间限制策略，成功展示了有序的单晶纳米线图案以及半导体分子铁电体（SMF）己烷-1,6-二铵五碘铋（HDA-BiI）的光电器件。SMF器件的半导体极化与铁电极化的耦合实现了从紫外到可见光的宽带自供电光电探测以及偏振可调光响应。这些可能为低成本、灵活的高性能SMF光电器件开辟一条道路。
