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

自组装光子材料中的分子线能量转移和激子扩散

• 批准号: 1006761
• 负责人: Pavel Anzenbacher
• 金额: $ 43.1万
• 依托单位: Bowling Green State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-08-15 至 2016-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1006761&HistoricalAwards=false
• 关键词: Molecular; Wire; Energy; Transfer; Exciton

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.

技术支持：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性质之间的关系有更深入的基本了解，这些材料允许观察单重态和三重态激子。该方法涉及合成和调查的协调材料组成的单重态供体，与扩展的共轭低聚物，和三重态受体，如铂（II）卟啉。合成了两种发光配位材料。一种类型将包括两个单重态发射体，双（8-喹啉酸酯）（AcAc）AlIII和共轭低聚物，以及掺杂共混的三重态受体，而第二种将由相同的结构单元组成，其中受体被并入“光子线”桥中。研究将集中在了解这些材料的光学和结构特性。特别注意将致力于能量转移和三重态扩散的作用。高三重态能量成分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。对平衡天蓝色（~490 nm）、绿色和橙子/红色发射以及通过三重态-三重态能量转移的激子平衡优化的洞察预期有助于设计适用于OLED并且特别是适用于基于OLED的固态照明的材料。这些材料将被设计为允许严格调查激子动力学，无论是单重态和三重态以及激子扩散，在许多固态设备的高度重要的过程。根据材料成分和激发/敏化方法，三个过程，单线态，三线态能量转移，和激子扩散进行不同的时间尺度，允许单独评估的过程。非技术性：该项目涉及材料科学专题领域的基础研究问题，与电子和光子学技术相关。本计画旨在研究对有机电子材料性能有重大影响的能量传递与激子扩散过程。该项目工作期间产生的知识将使人们能够更好地理解和设计用于OLED、有机光伏的材料，从而为节能技术的开发做出贡献。该项目强调通过实验室参与，补充课程和推广活动，在大学预科，本科和研究生的培训中进行综合教育和研究。该项目的多学科性质为本科生和研究生以及博士后的教育提供了独特的机会。这也是相关的国家资助的建设俄亥俄州人才可持续能源未来计划的目标，旨在为俄亥俄州化学和物理本科生提供可再生能源发电的STEM领域。这个项目也使社区学院的学生能够转到保龄球绿色圣U。并获得B. S。STEM专业的教育。