Collaborative Research: Charge Transport Pathways in Semiconducting Polymer Films

合作研究：半导体聚合物薄膜中的电荷传输路径

• 批准号: 1207032
• 负责人: Harald Ade
• 金额: $ 34.8万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-07-01 至 2016-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1207032&HistoricalAwards=false
• 关键词: Collaborative; Research; Charge; Transport; Pathways

TECHNICAL SUMMARYThe connection between charge transport and molecular order on intermediate length scales in films of semiconducting polymers will be examined. In most electrical devices, semiconducting polymer chains do not span the distance between the electrodes and the resulting electrical properties are the result of charge transport both along the chains and from chain-to-chain. Through a collaborative effort between scientists at UCSB and NCSU the charge transport pathways in semiconducting polymers will be studied by: 1) measuring the in-plane bulk and interface correlation length of the backbone of semiconducting polymers using a combination of physical and electrical characterization methods and 2) investigating transport in model block co-polymer systems with varying energetic structure to uncover how both positive and negative carriers are transported in complex systems. This work will use a novel polarized soft X-ray scattering method to probe the backbone correlation length that will enable a greater understanding of the connection between morphology and electrical transport. The scattering techniques developed in this work will have impact on characterization of both semiconducting and conventional polymers. NON-TECHNICAL SUMMARY Conjugated polymers have tremendous potential for use in cheap, flexible, light-weight devices as transistors in simple circuits, light emitting diodes, and solar cells. Improvement of our control of the properties of electrically conducting polymers will enable new types of electronic devices for use in energy conversion and biomedical diagnostics. This work will focus on the determination of the pathways of charge transport in conjugated polymers. Research in polymer electronics is highly multidisciplinary and will provide training for graduate students in materials science, chemistry, and microelectronics. The PIs and graduate students will also provide lab space and training for promising undergraduate students from underrepresented groups to advance their future careers in science and engineering. Outreach to children to promote science education in the local school districts will be done through demonstrations of flexible electronics devices by graduate student researchers at local science nights.

将研究半导体聚合物薄膜中电荷传输和中间长度尺度上分子有序性之间的联系。 在大多数电器件中，半导体聚合物链不跨越电极之间的距离，并且所得的电性质是电荷沿沿着链和从链到链传输的结果。通过UCSB和NCSU科学家之间的合作，将通过以下方式研究半导体聚合物中的电荷传输途径：1）使用物理和电学表征方法的组合来测量半导体聚合物主链的面内体积和界面相关长度;聚合物系统与不同的能量结构，以揭示如何积极和消极的载体在复杂的系统中进行运输。这项工作将使用一种新的偏振软X射线散射方法来探测骨干相关长度，这将使形态和电输运之间的连接有更好的理解。在这项工作中开发的散射技术将影响半导体和常规聚合物的表征。共轭聚合物在廉价、柔性、轻质器件中具有巨大的应用潜力，如简单电路中的晶体管、发光二极管和太阳能电池。我们对导电聚合物性能控制的改进将使新型电子设备能够用于能量转换和生物医学诊断。这项工作将集中在共轭聚合物的电荷传输路径的确定。聚合物电子学的研究是高度多学科的，将为材料科学，化学和微电子学的研究生提供培训。PI和研究生还将为来自代表性不足群体的有前途的本科生提供实验室空间和培训，以促进他们未来在科学和工程领域的职业生涯。将通过研究生研究人员在当地科学之夜演示柔性电子设备，向儿童宣传当地学区的科学教育。