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Layer-by-Layer Assembly of Monolayer Films Precisely Controlled by LB Technology to Realize Low Energy Consumption and High Stability Ternary Data-Storage Devices.

Organic semiconductor device with low energy consumption and excellent stability is highly desirable, controlling intermolecular alignment orientation by designing molecular structure or optimization of film preparation process is an alternative way to achieve this goal. In this paper, a new idea was proposed to realize the formation of aligned monomolecular layer and multimolecular layer thin films on the electrode substrate by controlling the surface pressure of molecular layer on the liquid surface by LB technology, an amphiphilic π-conjugated D-A molecule was synthesized, and the influence of spin coating and LB technology on intermolecular ordered stacking in the film and the electrical memory performance were investigated. The results demonstrated that the film fabricated by LB technology has some advantages compared with that fabricated by spin-coating method, such as higher crystallinity, lower surface roughness and better-organized monomolecular and multimolecular layer, which significantly promoted the performance of the electrical memory device with lower power consumption and longer stability.