We report the development of a coating device (multiple-droplet drop-casting), which releases multiple droplets simultaneously or with a short time-lag (<10 ms) using a multi-channel syringe pump to achieve deposition of large-area (up to ∼100 cm2) and patterned coatings. The device exhibits the following features and characteristics: simple, low-cost, and scalable; adaptive to various solution-processed materials; insensitive to small contaminations/impurities; minimizes material waste; and can create patterns (printing). The demonstration of the device performance was carried out by fabricating coatings using four strategic model solutions, namely, carbon nanotube ink, graphene oxide ink, [poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)] PEDOT:PSS solution, and n-methyl-2-pyrrolidone diluted methylammonium lead iodide (CH3NH3PbI3)-based light harvesting perovskite. We investigated the effect of release height (droplet velocity or Weber number) and the film area on the film characteristics. The results show that the device yields reproducible and uniform films on the order of micrometers in thickness and ∼1 μm in roughness.

中文翻译：

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涂层装置的设计和开发：多液滴滴涂（MDDC-Alpha）

我们报告了一种涂层设备（多滴滴铸）的开发，该设备使用多通道注射泵同时或以短时间延迟（<10 毫秒）释放多个液滴，以实现大面积（向上）的沉积。约 100 cm2) 和图案涂层。该设备具有以下特点和特点：简单、低成本、可扩展；适应各种溶液加工材料；对小污染/杂质不敏感；最大限度地减少材料浪费；并且可以创建图案（印刷）。通过使用四种战略模型解决方案制造涂层来进行器件性能的演示，即碳纳米管墨水、氧化石墨烯墨水、[聚（3,4-乙撑二氧噻吩）：聚（苯乙烯磺酸盐）] PEDOT：PSS 溶液，和 n-甲基-2-吡咯烷酮稀释的甲基碘化铅（CH3NH3PbI3）基光捕获钙钛矿。我们研究了释放高度（液滴速度或韦伯数）和薄膜面积对薄膜特性的影响。结果表明，该装置产生可重复且均匀的薄膜，厚度约为微米，粗糙度约为 1 微米。