Collaborative Research: Energy Transfer in Strongly Coupled Hybrid Organic-Inorganic Systems

合作研究：强耦合有机-无机杂化系统中的能量转移

• 批准号: 1411064
• 负责人: Stephen Forrest
• 金额: $ 24万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-07-01 至 2017-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1411064&HistoricalAwards=false
• 关键词: Collaborative; Research; Energy; Transfer; Strongly

Non-technical Description: Energy transfer between molecular systems lies at the heart of several natural and artificial energy harvesting systems as well as in high-performance light emitters and sensors. Thus understanding and controlling the energy transfer process are of significant importance to both fundamental research and technological applications. This collaborative project develops artificial organic-inorganic hybrid systems where the energy transfer process is controlled by engineering the surrounding optical environment. The results of the project will provide guidelines for the design of efficient energy transferring organic/inorganic molecular systems geared towards applications such as next-generation solar cells, light emitting diodes and sensors. The project provides training in an interdisciplinary environment to graduate and undergraduate students at City College of New York and University of Michigan. In addition, the project integrates with outreach efforts such as high-school student participation in the research and public lectures/demonstrations to local-area high-school students. These are excellent recruiting and training tools for future scientists and engineers.Technical Description: The primary goal of this project is to elucidate the role of exciton wavefunction delocalization in the energy transfer process between donor and acceptor molecules and to develop methods to control it using artificially engineered systems. In this context researchers develop artificially engineered energy transfer systems through strongly coupled organic-inorganic hybrid excitons. By exploiting the fundamentally different nature of excitons in organic and inorganic systems and hybridizing them provides a whole new control parameter for energy transfer. Here the coupling strengths and exciton wavefunctions are controlled via light, morphology and dimensionality. Specific materials systems investigated include inorganic excitons of zinc oxide (ZnO) and cadmium sulfide (CdS) quantum dots and the organic excitons of polycrystalline organic 3,4,7,8 napthalenetetracarboxylic dianhydride (NTCDA) and anthracene. These studies are designed to form the basis for developing highly efficient energy transfer systems for practical applications.

非技术描述：分子系统之间的能量转移是几个天然和人工能量收集系统的核心，也是高性能光发射器和传感器的核心。因此，了解和控制能量传递过程对基础研究和技术应用都具有重要意义。这个合作项目开发了人工有机-无机混合系统，其中能量转移过程通过工程周围的光学环境进行控制。该项目的结果将为设计面向下一代太阳能电池、发光二极管和传感器等应用的高效能量转移有机/无机分子系统提供指导。该项目为纽约城市学院和密歇根大学的研究生和本科生提供跨学科环境的培训。此外，该项目还与推广工作相结合，如高中生参与研究和对当地高中生的公开讲座/示范。技术描述：该项目的主要目标是阐明激子波函数离域在供体和受体分子之间的能量传递过程中的作用，并开发使用人工工程系统来控制它的方法。在此背景下，研究人员开发了通过强耦合有机-无机混合激子的人工工程能量转移系统。通过利用有机和无机系统中激子的根本不同性质，并将它们混合在一起，为能量转移提供了一个全新的控制参数。其中，耦合强度和激子波函数由光、形态和维度控制。所研究的特殊材料体系包括氧化锌(ZnO)和硫化镉(CDS)量子点的无机激子，以及多晶有机3，4，7，8-萘四甲酸二酐(NTCDA)和菲的有机激子。这些研究旨在为实际应用开发高效的能量传输系统奠定基础。