CAREER: Fundamental Limits of Charge Transport in Organic Semiconductors

该项目的目标是开发具有前所未有的性能和可重复性的大面积、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架构来实现。在电荷注入和输运方面获得的结果将使这些高性能器件的工程喷涂沉积成为可能。知识价值在于(1)探索单晶形式的可溶性小分子有机半导体的固有性质，(2)将成功的候选材料纳入喷雾沉积器件中，以及(3)通过控制薄膜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用于高迁移率半导体和介电材料，以降低工作电压。探索加工细节与由此产生的接触效应、薄膜微观结构和电荷输运之间的相互作用将为开发更好的器件提供反馈。该项目在设计一个独特的平台来回答有关技术相关材料中的电荷传输问题方面具有变革性，是第一个使用与溶液沉积技术兼容的材料单晶的项目。更广泛的影响与有机电子对我们经济发展的预期重要性相一致；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跨越晶体生长、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新课程和推广项目中。PI将说服女孩们，科学事业是令人兴奋和可能的。

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.