CAREER: Fundamental Limits of Charge Transport in Organic Semiconductors

该计划的目标是开发具有前所未有的性能和重复性的大面积、低成本的有机场效应晶体管和有机光伏。这一目标将通过使用单晶来设计和实现新的材料和器件结构来实现。在电荷注入和输运方面取得的成果将使喷雾沉积高性能器件的工程化成为可能。智能的优点在于(1)探索单晶形式的可溶小分子有机半导体的内在性质，(2)将成功的候选者纳入喷射沉积器件，以及(3)通过控制膜的均匀性和器件结构来优化其性能。非破坏性接触沉积技术将与高迁移率半导体和促进降低工作电压的介质一起使用。探索工艺细节与由此产生的接触效应、薄膜微结构和电荷传输之间的相互作用，将为开发更好的器件提供反馈。该项目具有变革性，设计了一个独特的平台来回答与技术相关的材料中的电荷传输问题，首次使用了与溶液沉积技术兼容的材料单晶。更广泛的影响与有机电子对我们经济进步的预期重要性一致；项目成果将推动高性能设备的发展，从而引发一项新技术。此外，研究生、本科生和高中生将获得横跨晶体生长、器件设计、制造和表征的知识和技能。基础设施和成果将被整合到当地科学博物馆的一门新课程和推广计划中。PI将说服女孩们相信科学职业是令人兴奋的和可能的。

The objective of this program is to develop large-area, low-cost organic field-effect transistors and organic photovoltaics with unprecedented performance and reproducibility. This goal will be achieved by using single-crystals to design and implement novel materials and device architectures. Results obtained on charge injection and transport will enable engineering of these high performance devices by spray-deposition.The intellectual merit inheres in (1) exploring the intrinsic properties of soluble small-molecule organic semiconductors in single-crystal form, (2) incorporating successful candidates in spray-deposited devices, and (3) optimizing their performance by controlling film uniformity and device structure. Nondestructive contact deposition techniques will be used with high mobility semiconductors and with dielectrics promoting reduced operating voltages. Exploring the interplay between processing details and the resulting contact effects, film microstructure and charge transport will provide feedback for developing better devices. The project is transformational in devising a unique platform to answer questions about charge transport in technologically relevant materials, being the first to use single crystals of materials compatible with solution-deposition techniques.The broader impacts are aligned with the anticipated importance of organic electronics to our economic progress; project results will advance high-performance devices that spark a new technology. In addition, graduate, undergraduate, and high-school students will gain knowledge and skill sets spanning crystal growth, device design, fabrication and characterization. Infrastructure and results will be integrated in a new course and outreach programs at the local science museum. The PI will persuade girls that science careers are exciting and possible.