Rational Design and Synthesis of Targeted Nanostructures in Organic Photovoltaics

有机光伏中目标纳米结构的合理设计与合成

• 批准号: 0932666
• 负责人: Mark Dadmun
• 金额: $ 30万
• 依托单位: University of Tennessee Knoxville
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0932666&HistoricalAwards=false
• 关键词: Rational; Design; Synthesis; Targeted; Nanostructures

0932666DadmunIntellectual Merit - Conjugated polymers (CPs) are a promising class of materials for use in the conversion of solar energy to electricity. For optimal performance in bulk heterojunction CPs, the morphology of the donor and acceptor materials must form percolating interpenetrating networks maximizing interfacial contacts w/ length scale of ~10 nm. Currently, we lack the fundamental understanding to guide the formation of bulk heterojunctions to these targeted nanoscale morphologies. In this collaborative proposal, an understanding of the fundamental driving forces that govern the nanoscale self-assembly and interfaces in conjugated block copolymer (BCP) thin films will be developed in order to enable the rational design and fabrication of the targeted bicontinuous nanoscale morphologies. This will be realized by completing an interdisciplinary research program that will detail the thermodynamic driving forces that control the formation of a bicontinuous interconnected percolated morphology in a thin film of conjugated BCP with controlled rigidity on a surface that is patterned incommensurately to the periodicity of the diblock copolymer as well as the synthesis and thin film structure of conjugated diblock polymers that exhibit traditional diblock morphologies. Therefore upon completion, we will attain an understanding of the thermodynamics that control the assembly of these systems in thin films; enabling the reproducible creation of the desired bicontinuous interconnected morphologies with this structure, providing a transformative method to rationally design, tailor and fabricate nanoscale morphologies with exquisite control of size and thickness for CP systems. The successful completion of these experiments will broaden the range of nanoscale thin film morphologies that can be targeted and rationally tuned in conjugated polymer thin films, and thus allow a systematic study of CP morphology on organic photovoltaics, a critical area in their optimization, yet a parameter that is not currently controllable experimentally. Broader Impact - This project is an integrated collaborative effort between Chemistry, Chemical Engineering, and Materials Science research groups at the University of Tennessee. The broader impacts of the proposed program are embodied in this interdisciplinary collaboration, as well as the educational experiences to which it will lead. In the course of this project, the PIs will continue their outreach programs and use their research to provide training experiences for undergraduate and high school students and K-12 teachers, as well as provide input to their own teaching and exciting areas for discussion at K-12 visits. The execution of this collaborative project will also develop an interdisciplinary system of instruction, via classroom and laboratory, for training graduate and undergraduate students in chemistry, materials science, and mathematics who will be equipped to tackle modern science and engineering challenges. This project will also further develop the sustainable research infrastructure in Tennessee, an EPSCOR state, and will be implemented to ensure the participation of underrepresented groups in this research.

智能共轭聚合物(CPS)是一类很有前途的太阳能到电能转换材料。为了在体相异质结CPS中获得最好的性能，施主和受主材料的形貌必须形成渗流互穿网络，使界面接触达到最大长度，尺度为~10 nm。目前，我们缺乏基本的认识来指导这些靶向纳米级形貌的体相异质结的形成。在这项合作提案中，我们将了解控制共轭嵌段共聚物(BCP)薄膜中纳米级自组装和界面的基本驱动力，以便能够合理地设计和制备目标双连续纳米形态。这将通过完成一项跨学科研究计划来实现，该计划将详细说明控制在表面上具有受控刚性的共轭BCP薄膜中形成双连续互连渗流形态的热力学驱动力，该薄膜的表面图案化与两嵌段共聚物的周期性不相称，以及呈现传统两嵌段形态的共轭两嵌段聚合物的合成和薄膜结构。因此，完成后，我们将了解控制这些系统在薄膜中组装的热力学；能够以这种结构重复创建所需的双连续相互连接的形貌，为CP系统提供一种合理设计、定制和制造纳米级形貌的变革性方法，并精确控制尺寸和厚度。这些实验的成功完成将拓宽共轭聚合物薄膜中可定向和合理调谐的纳米级薄膜形态的范围，从而允许系统地研究有机光伏中的CP形态，这是有机光伏优化的关键领域，但目前在实验上无法控制这一参数。更广泛的影响-该项目是田纳西大学化学、化学工程和材料科学研究小组之间的综合合作努力。拟议计划的更广泛影响体现在这种跨学科合作中，以及它将带来的教育经验。在这个项目的过程中，私人投资机构将继续他们的外展计划，并利用他们的研究为本科生、高中生和K-12教师提供培训经验，并为他们自己的教学和激动人心的领域提供意见，供K-12访问时讨论。这一合作项目的实施还将通过课堂和实验室开发一个跨学科的教学系统，以培训化学、材料科学和数学方面的研究生和本科生，他们将具备应对现代科学和工程挑战的能力。该项目还将在EPSCoR州田纳西州进一步发展可持续研究基础设施，并将予以实施，以确保代表性不足的群体参与这项研究。