Liu Jie, Yu Yamin, Liu Jie, Li Tao, Li Chunlei, Zhang Jing, Hu Wenping, Liu Yunqi, Jiang Lang
Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
University of the Chinese Academy of Sciences, Beijing, 100049, China.
Adv Mater. 2022 Feb;34(7):e2107574. doi: 10.1002/adma.202107574. Epub 2022 Jan 2.
Organic single-crystalline semiconductors are highly desired for the fabrication of integrated electronic circuits, yet their uniform growth and efficient patterning is a huge challenge. Here, a general solution procedure named the "soft-template-assisted-assembly method" is developed to prepare centimeter-scale monolayer molecular crystal (MMC) arrays with precise regulation over their size and location via a capillary-confinement crystallization process. It is remarkable that the field-effect mobility of the array is highly uniform, with variation less than 4.4%, which demonstrates the most uniform organic single-crystal arrays ever reported so far. Simulations based on fluid dynamics are carried out to understand the function mechanism of this method. Thanks to the ultrasmooth crystalline orientation surface of MMCs, high-quality p-n heterojunction arrays can be prepared by weak epitaxy growth of n-type material atop the MMC. The p-n heterojunction field-effect transistors show ambipolar characteristics and the corresponding inverters constructed by these heterojunctions exhibit a competitive gain of 155. This work provides a general strategy to realize the preparation and application of logic complementary circuits based on patterned organic single crystals.
有机单晶半导体对于集成电路制造来说是非常理想的材料，然而其均匀生长和高效图案化却是一个巨大的挑战。在此，我们开发了一种通用的解决方法，即“软模板辅助组装法”，通过毛细管限制结晶过程来制备厘米级的单层分子晶体（MMC）阵列，并对其尺寸和位置进行精确调控。值得注意的是，该阵列的场效应迁移率高度均匀，变化小于4.4%，这展示了迄今为止报道的最均匀的有机单晶阵列。基于流体动力学进行了模拟，以了解该方法的作用机制。得益于MMC超光滑的晶体取向表面，通过在MMC顶部进行n型材料的弱外延生长，可以制备高质量的p-n异质结阵列。p-n异质结场效应晶体管表现出双极性特性，由这些异质结构建的相应反相器具有155的竞争增益。这项工作提供了一种通用策略，以实现基于图案化有机单晶的逻辑互补电路的制备和应用。
