Single-crystal semiconductors have been at the forefront of scientific interest for more than 70 years, serving as the backbone of electronic devices. Inorganic single crystals are typically grown from a melt using time-consuming and energy-intensive processes. Organic semiconductor single crystals, however, can be grown using solution-based methods at room temperature in air, opening up the possibility of large-scale production of inexpensive electronics targeting applications ranging from field-effect transistors and light-emitting diodes to medical X-ray detectors. Here we demonstrate a low-cost, scalable spray-printing process to fabricate high-quality organic single crystals, based on various semiconducting small molecules on virtually any substrate by combining the advantages of antisolvent crystallization and solution shearing. The crystals' size, shape and orientation are controlled by the sheer force generated by the spray droplets' impact onto the antisolvent's surface. This method demonstrates the feasibility of a spray-on single-crystal organic electronics.

译文

70多年来,单晶半导体一直处于科学关注的最前沿,是电子设备的骨干。无机单晶通常使用耗时且耗能的方法从熔体中生长。但是,可以在室温下在空气中使用基于溶液的方法来生长有机半导体单晶,这为大规模生产廉价的电子靶向应用提供了可能性,从场效应晶体管和发光二极管到医用x射线检测器。在这里,我们展示了一种低成本,可扩展的喷涂工艺,通过结合抗溶剂结晶和溶液剪切的优点,基于几乎任何基材上的各种半导体小分子来制造高质量的有机单晶。晶体的大小,形状和取向受喷雾液滴撞击反溶剂表面所产生的压力控制。该方法证明了喷涂单晶有机电子器件的可行性。

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