Surface Analytical Investigation on Organic Donor-Acceptor Interfaces

有机供体-受体界面的表面分析研究

• 批准号: 1006098
• 负责人: Yongli Gao
• 金额: $ 38万
• 依托单位: University of Rochester
• 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: 2010-07-15 至 2014-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1006098&HistoricalAwards=false
• 关键词: Surface; Analytical; Investigation; Organic; Donor

Technical: This project studies the interfaces in small-molecule organic photovoltaic materials using surface analytical probes. The objective of the experimental research is to understand the fundamental aspects of the interface electronic structures and the exciton dissociation at the donor-acceptor interfaces. The main experimental techniques include x-ray photoemission spectroscopy, ultraviolet photoemission spectroscopy, and inverse photoemission spectroscopy. Exciton dissociation at the donor-acceptor interfaces is measured by observing the quenching of the photoluminescence spectroscopy intensity. The charge transfer dynamics across the donor-acceptor interfaces is investigated with time-resolved two-photon photoemission spectroscopy. X-ray photoemission spectroscopy is used to study the interface chemistry. The morphology of the organic layers is characterized with scanning tunneling microscopy, atomic force microscopy, and near-field scanning optical microscopy. The project will also test the concepts developed through the surface/interface analysis by fabricating and characterize simple organic photovoltaic devices fabricated based on the findings of surface analytical investigations.Non-technical: The project addresses basic research issues in a topical area of materials science with high technological relevance. It addresses fundamental understanding of organic photovoltaics, a promising candidate important for renewable and environmentally friendly energy source. A major part of the project is educating and training graduate and undergraduate students through interdisciplinary research in advanced organic materials and devices and in materials surface/interface characterization. A strong focus of the program is providing early exposure of research to middle and high school students through programs including University of Rochester Pre-College Experience in Physics for women.

技术：本项目使用表面分析探针研究小分子有机光伏材料中的界面。实验研究的目的是了解界面电子结构和激子在施主-受主界面的解离的基本方面。主要的实验技术包括X射线光电子能谱、紫外光电子能谱和逆光电子能谱。通过观察光致发光光谱强度的猝灭来测量在施主-受主界面处的激子解离。用时间分辨双光子光电子能谱研究了施主-受主界面的电荷转移动力学。X射线光电子能谱被用来研究界面化学。用扫描隧道显微镜、原子力显微镜和近场扫描光学显微镜对有机层的形貌进行了表征。该项目还将测试通过表面/界面分析开发的概念，制作简单的有机光伏器件，并根据表面分析调查的结果进行表征。非技术性：该项目涉及具有高技术相关性的材料科学专题领域的基础研究问题。它解决了有机光化学的基本理解，一个有前途的候选人重要的可再生和环境友好的能源。该项目的一个主要部分是教育和培训研究生和本科生，通过跨学科研究先进的有机材料和设备，并在材料表面/界面表征。该方案的一个重点是通过包括罗切斯特大学物理学预科课程在内的妇女方案，向初中和高中学生提供早期研究。