Molecular-Wire Energy Transfer and Exciton Diffusion in Self-Assembled Photonic Materials

技术：该项目的目标是对自组装有机金属材料的合成/加工以及结构和光子特性之间的关系有更深入的了解，从而可以观察单线态和三重态激子。该方法包括合成和研究配位材料，该配位材料由单线态供体、扩展共轭低聚物和三重态受体（如Pt（II）卟啉）组成。将合成两种类型的发射配位材料。一种类型将包括两个单重态发射器，双（8-喹啉酸酯）（AcAc）AlIII和共轭低聚物，以及掺杂混合的三态受体，而第二种类型将由相同的构建块组成，其中受体包含在“光子线”桥中。研究将集中于了解这些材料的光学和结构特性。我们将特别关注能量传递和三重态扩散的作用。高三重态能量组件将用于制造能够利用更高能量过程产生天蓝色和绿色磷光的材料。通过三重态-三重态能量转移来平衡天蓝（~490 nm）、绿色和橙色/红色发射以及激子平衡优化，有望有助于设计适合oled的材料，特别是基于oled的固态照明。这些材料的设计将允许对激子动力学进行严格的研究，包括单线态和三重态以及激子扩散，这是许多固态器件中非常重要的过程。根据材料成分和激发/敏化方法的不同，三个过程，单线态，三重态能量传递和激子扩散在不同的时间尺度上进行，允许单独评估过程。非技术：该项目涉及与电子和光子学技术相关的材料科学主题领域的基础研究问题。本项目旨在研究对有机电子材料性能有重大影响的能量传递和激子扩散过程。在这个项目的工作过程中产生的知识将使人们更好地理解和设计将用于有机光电二极管的材料，从而促进节能技术的发展。该项目强调通过实验室参与、补充课程和拓展活动，对大学预科学生、本科生和研究生进行综合教育和研究培训。该项目的多学科特点为本科生、研究生和博士后的教育提供了一个独特的机会。这也是相关的国家资助的俄亥俄州可持续能源未来人才建设项目的目标，该项目旨在为俄亥俄州化学和物理专业的本科生提供可再生能源发电的STEM领域。该项目还使社区大学的学生能够转学到圣鲍灵格林大学，并接受STEM专业的学士学位教育。

Technical: The goal of this project is greater fundamental understanding of synthesis/processing and relationships between structure and photonic properties of self-assembled organometallic materials that allow for observation of both singlet and triplet excitons. The approach involves synthesis and investigation of coordination materials consisting of a singlet donor, with extended conjugated oligomers, and triplet acceptors, such as Pt(II) porphyrins. Two types of emissive coordination materials will be synthesized. One type will comprise two singlet state emitters, bis(8- quinolinolate)(AcAc)AlIII and conjugated oligomers, and doped-blended triplet acceptor, while the second will be composed of the same building block with the acceptor incorporated in a 'photonic wire' bridge. Studies will be focused on understanding the optical and structural properties of these materials. Particular attention will be devoted to the role of energy transfer and triplet diffusion. High-triplet energy components will be used to make materials capable of harnessing higher-energy processes for sky-blue and green phosphorescence. Insight into balancing sky-blue (~490 nm), green and orange/red emission and exciton-balance optimization via triplet-triplet energy transfer is expected to aid in the design of materials suitable for OLEDs and particularly for OLED-based solid-state lighting. The materials will be designed to allow for rigorous investigation of exciton dynamics, both singlet and triplet as well as exciton diffusion, processes of high importance in many solid state devices. Depending on the material components and method of excitation/sensitization, three processes, singlet, triplet energy transfer, and exciton diffusion proceed on different timescales, allowing evaluation of the processes separately. Non-technical: The project addresses basic research issues in a topical area of materials science with technological relevance in electronics and photonics. This project is aimed at investigating energy transfer and exciton diffusion processes that have a major impact on performance of organic electronic materials. The knowledge generated during the work on this project will enable a better understanding and design of materials that will be used in OLEDs, organic photovoltaics, thus contributing to the development of energy-efficient technologies. The project emphasizes integrated education and research in training of pre-college, undergraduate, and graduate students through laboratory participation, complementary coursework, and outreach activities. The multidisciplinary character of the project provides a unique opportunity for education of undergraduate and graduate students and postdocs. This is also a goal of the associated state-funded Building Ohio Talent for a Sustainable Energy Future program aimed at STEM areas of renewable energy generation for Ohio undergraduates in chemistry and physics. This program also enables community college students to transfer to Bowling Green St. U. and receive B.S. education in STEM majors.