Synthesis of Chemically Stable Polycyclic Aromatic Hydrocarbons for High-Performance Organic Electronics

非技术描述：有机半导体对于溶液处理的晶体管、对于照明应用以及作为用于产生太阳能的材料具有日益增长的重要性，这是由于这些材料的低成本生产的前景。对于所有这些应用，有机半导体材料表现出高性能和化学稳定性至关重要。该项目旨在开发一种用于高性能电子应用的新型有机半导体材料。具体来说，该项目探讨了分子设计如何影响化学稳定性，结晶和设备性能。了解这些分子系统中的结构-性质关系将使科学家能够合理地设计出更好的材料，用于现实世界的消费电子设备。除了为来自不同背景的本科生，研究生和博士后研究人员提供研究机会（利用&PI创建的马萨诸塞州-阿默斯特大学科学工程多样性研究生），该项目中创建的新科学概念在国际会议的教程和研讨会中进行讨论，同时也教授给附近两所学校的高中生，这两所学校为马萨诸塞州西部的少数民族学生提供服务。技术描述：这个项目探讨的假设是，添加一个或多个芳香π六重奏，角多环芳烃半导体中的苯环（苯环型环）可以改善结晶薄膜中的分子堆积、电荷传输性质和化学稳定性，这是由于增加了共振稳定能。通过X射线分析，晶体管测量和理论/计算方法，探索周环/环加成反应的过渡态，通过表征晶体薄膜的假设正在得到验证。结合理论和复杂的散射方法的一类新的芳香族半导体的独特的方法和使用有助于连接分子设计的基本原则，在有机-有机和有机-基质界面的电荷传输。

Nontechnical Description: Organic semiconductors are of growing importance for solution-processed transistors, for lighting applications, and as materials used to generate solar energy due to the prospect for low-cost production of these materials. For all these applications, it is crucial that the organic semiconductor materials exhibit high performance and chemical stability. This project aims to develop a new class of organic semiconductor materials for use in high-performance electronic applications. Specifically, this project explores how molecular design will affect chemical stability, crystallization, and device performance. Understanding the structure-property relationship in these molecular systems will allow scientists to rationally design even better materials for use in real-world consumer electronic devices. In addition to providing research opportunities for undergraduate, graduate, and postdoctoral researchers from diverse backgrounds (utilizing the Graduate Students for Diversity in Science & Engineering at University of Massachusetts - Amherst that the PI created), the new scientific concepts created in this project are discussed in tutorials and workshops at international conferences, and also taught to high-school students from two nearby schools that serve a population of minority students in western Massachusetts.Technical Description: This project explores the hypothesis that the addition of one or more aromatic pi sextets (benzenoid rings) in angular polycyclic aromatic hydrocarbon semiconductors can improve the molecular packing in crystalline thin films, charge transport properties, and chemical stability due to increased resonance stabilization energies. The hypothesis is being verified through the characterization of crystalline thin films via x-ray analysis, transistor measurements, and theory/computational methods to explore transition states of pericyclic/cycloaddition reactions. The unique approach and use of a new class of aromatic semiconductors combined with theory and sophisticated scattering methods contribute to connecting fundamental principles of molecular design to charge transport at organic-organic and organic-substrate interfaces.