Patterning of Large Array Organic Semiconductor Single Crystals

技术概述：溶液加工是有机电子器件大面积生产的理想选择。在高通量工业制造过程中，溶液中的薄膜沉积通常在动力学结晶状态下进行。由于印刷过程中溶剂的动力学蒸发、随机成核和流体流动的不稳定性，直接通过溶液印刷获得单晶仍然具有挑战性。大多数用于制造单晶的溶液加工技术在缓慢的准平衡条件下操作，使得这些方法不适合工业应用。这些挑战要求对有机半导体（OSCs）的溶液结晶过程有更好的基本理解，以便为高性能电子器件的高通量制造开发更好的溶液处理方法。在固态与材料化学项目的支持下，本项目将以溶液剪切（SS）平台为模型系统，获得控制晶体成核和分子堆积的方法。研究了从单核位置控制晶体生长的参数和获得图像化单晶区域的方法。最后，一个全面的理解和方法将开发实现具有所需分子包装的图案单晶域。将测量所得薄膜的电荷输运特性，以表征形态和分子包装对电荷输运的影响。这项工作将对调节osc的分子堆积和形态有基本的认识。这对于前所未有的性能和未来大规模生产有机电子产品至关重要。非技术概述：溶液加工是有机电子器件大面积制造的理想选择。所提出的工作将导致对有机半导体（OSCs）溶液加工中的成核和生长的系统理解。这对于推进有机电子领域至关重要，同时也为这些设备（例如有机发光二极管、有机太阳能电池、晶体管和传感器）的未来制造提供了见解。PI和参与的学生将与斯坦福大学科学拓展办公室密切合作，接触到包括K-12、社区学院、本科生和研究生在内的广泛人群，并为未来的科学和技术新领域的教师做好准备。这项研究将使研究生和本科生接触到广泛的学科以及广泛的有机电子技术。学生将接受有效沟通的训练，以多学科方法解决问题，从而获得技术工程，基本科学理解和沟通技巧的令人印象深刻的结合。这项研究还有望支持美国跨学科研究的发展，并促进公众对有机电子对工业和经济发展的影响的理解。

TECHNICAL SUMMARY:Solution processing is highly desirable for large area production of organic electronic devices. Film deposition from solution is usually performed at the kinetic crystallization regime in high throughput industrial fabrication processes. Attaining single crystals directly through solution printing remains challenging due to kinetic solvent evaporation, stochastic nucleation, and fluid flow instabilities during the printing process. Most solution processing techniques for fabricating single crystals operate at slow quasi-equilibrium conditions, rendering these methods undesirable for industrial applications. These challenges call for a better fundamental understanding of solution crystallization processes of organic semiconductors (OSCs) to allow the development of better solution processing methods for high-throughput fabrication of high performance electronic devices. In this project, supported by the Solid State and Materials Chemistry program, ways to control crystal nucleation and molecular packing will be obtained using a solution shearing (SS) platform as a model system. The parameters for controlled crystal growth from single nucleation sites and methods to obtain patterned single-crystalline domains will be investigated. Finally, a comprehensive understanding and approach will be developed for achieving patterned single-crystalline domains with desired molecular packing. Charge transport properties of the resulting films will be measured to characterize effects of morphology and molecular packing on charge transport. This work will develop fundamental understanding on tuning molecular packing and morphology in OSCs. This is essential for unprecedented performance and future large-scale production of organic electronics.NON-TECHNICAL SUMMARY:Solution processing is highly desirable for large-area manufacturing of organic electronic devices. The proposed work will result in a systematic understanding of nucleation and growth in solution processing of organic semiconductors (OSCs). This is crucial for advancing the field of organic electronics, as well as, providing insights for future manufacturing of these devices (e.g. organic light emitting diodes, organic solar cells, transistors and sensors). The PI and student involved will work closely with the Stanford Office of Science Outreach Office to reach out to a broad population ranging from K-12, community college, undergraduate, and graduate students as well as prepare the teachers of tomorrow for new areas of science and technology. This research will expose both graduate students and undergraduates to a broad range of disciplines as well as a wide range of organic electronics technologies. Students will receive training on effective communication, a multidisciplinary approach to problem solving, thus, obtaining an impressive combination of technical engineering, basic scientific understanding, and communication skills. This research is also expected to support the development of interdisciplinary research in the United States and to promote public understanding of the impact of organic electronics on industrial and economic development.