Currently, due to the lack of precise control of flow behavior and the understanding of how it influences thin‐film crystallization, strict tuning of thin‐film properties during solution‐based coating is difficult. In this work, a continuous‐flow microfluidic‐channel‐based meniscus‐guided coating (CoMiC) is introduced, which is a system that enables manipulation of flow patterns and analysis connecting flow pattern, crystallization, and thin‐film properties. Continuous supply of a solution of an organic semiconductor with various flow patterns is generated using microfluidic channels. 3D numerical simulations and in situ microscopy allow the tracking of the flow pattern along its entire path (from within the microfluidic channel to near the liquid–solid boundary), and enable direct observation of thin‐film crystallization process. In particular, the generation of chaotic flow results in unprecedented device‐to‐device uniformity, with coefficient of variation (CV) of 7.3% and average mobility of 2.04 cm² V⁻¹ s⁻¹ in doped TIPS‐pentacene. Furthermore, CV and average mobility of 9.6% and 11.4 cm² V⁻¹ s⁻¹ are achieved, respectively, in a small molecule:polymer blend system. CoMiC can serve as a guideline for elucidating the relation between flow behavior, liquid‐to‐solid phase transition, and device performance, which has thus far been unknown.

中文翻译：

---

具有优异的器件间一致性的有机晶体管的数值模拟和原位光学显微镜连接流型，结晶和薄膜特性

当前，由于缺乏对流动行为的精确控制以及对它如何影响薄膜结晶的理解，因此很难在溶液型涂布过程中严格调节薄膜性能。在这项工作中，引入了一种基于微流通道的连续流弯月面引导涂层（CoMiC），该系统能够控制流型并分析连接流型，结晶和薄膜特性。使用微流体通道连续产生具有各种流动模式的有机半导体溶液。3D数值模拟和原位显微镜技术可沿其整个路径（从微流体通道内到液固边界附近）跟踪流型，并能够直接观察薄膜的结晶过程。尤其是，掺杂的TIPS-并五苯中的² V ^-1 s ^-1。此外，在小分子：聚合物共混体系中，CV和平均迁移率分别达到9.6％和11.4 cm ² V ^-1 s ^-1。CoMiC可以用作阐明流动行为，液相至固相转变和设备性能之间关系的指南，这是目前为止未知的。