The Role of Local Heterogeneity in Organic Semiconductor Performance

局部异质性在有机半导体性能中的作用

• 批准号: 1005504
• 负责人: David Ginger
• 金额: $ 36万
• 依托单位: University of Washington
• 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: 2010-07-01 至 2013-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1005504&HistoricalAwards=false
• 关键词: Role; Local; Heterogeneity; Organic; Semiconductor

Technical: The goal of this proposal is to study how local nanoscale heterogeneity affects the performance of organic semiconductors using electrical scanning-probe microscopy. By bringing novel experimental capabilities to directly measure nanoscale variations in the electronic properties of model organic semiconductor films and study at the microscopic level how heterogeneity arising from variations in processing parameters leads to variations in performance. This project will address unique new challenges including:1) Studying the evolution of local current distributions as a function of processing-induced disorder in charge transport in organic semiconductors;2) Obtaining local information about vertical film structure to construct a picture of 3D morphology in photovoltaic blends using local scanning probes.3) Using time-resolved electrostatic force microscopy to study trapping, de-trapping, and photochemical degradation kinetics on sub-100 microsecond, and sub-100 nm scales to probe correlations between nanoscale film structures and trapping in organic semiconductor films.These objectives are of fundamental scientific importance to the field of organic semiconductors and address basic description of transport processes in these systems: if 1D models are insufficient, what is the most physical yet efficient way for 3D models to include +the requisite spatial disorder? How are the disorder parameters in theory linked to experimental processing conditions and observables? While the morphology/performance relationship in organics is widely recognized as a central challenge that affects the field from theory to synthesis to manufacturing, most methods of characterizing morphology permit only a correlation of average performance with average local structure and thus overlook the important role of local heterogeneity. This proposal will help transform the understanding and use of organic semiconductors.Non-technical: The project addresses basic research issues in a topical area of materials science with technological relevance, and is expected to provide unique opportunities for graduate and undergraduate training in an interdisciplinary field. This research project is also expected to have broader impacts through the training of scientists in this research field, through the wide dissemination of the findings of this research through publications. The proposed research program will take place at the intersection of chemistry, physics, and materials science, and has technological applications in the areas of photovoltaics, energy efficient displays, and lighting. This proposal will support established educational programs including ongoing recruitment of under-represented groups into scientific careers, public outreach to K- 12 students, and broader interactions with the local community. The project will create new undergraduate research projects, international collaborations, and new industrial educational experiences and partnerships.

技术：该提案的目的是研究局部纳米级异质性如何使用电扫描 - 探针显微镜影响有机半导体的性能。通过带来新颖的实验能力，可以直接测量模型有机半导体膜的电子性质中的纳米级变化，并在微观级别进行研究，如何因处理参数的变化而产生异质性。 This project will address unique new challenges including:1) Studying the evolution of local current distributions as a function of processing-induced disorder in charge transport in organic semiconductors;2) Obtaining local information about vertical film structure to construct a picture of 3D morphology in photovoltaic blends using local scanning probes.3) Using time-resolved electrostatic force microscopy to study trapping, de-trapping, and photochemical degradation纳米级膜结构和捕获有机半导体膜中的探测相关性的微秒和100 nm的动力学。这些目标对有机半导体的科学重要性至关重要理论中的疾病参数如何与实验处理条件和可观察结果相关联？尽管有机物中的形态/性能关系被广泛认为是影响从理论到综合再到制造领域的核心挑战，但大多数表征形态学的方法只允许平均性能与平均局部结构的相关性，因此忽略了局部异质性的重要作用。该建议将有助于改变有机半导体的理解和使用。没有技术：该项目解决了具有技术相关性的材料科学局部研究领域的基础研究问题，并有望为跨学科领域的研究生和本科培训提供独特的机会。预计，通过在该研究领域的科学家培训这项研究，通过通过出版物对这项研究的发现进行广泛的传播，该研究项目将产生更大的影响。拟议的研究计划将在化学，物理学和材料科学的交汇处进行，并在光伏，节能显示和照明领域具有技术应用。 该提案将支持既定的教育计划，包括持续招募代表性不足的团体从事科学职业，公开向K-12学生宣传以及与当地社区的更广泛互动。该项目将创建新的本科研究项目，国际合作以及新的工业教育经验和合作伙伴关系。