Synthesis and Photovoltaic Properties of Two-Dimensional Conjugated Macromolecules

技术概述：该奖项旨在从概念上开发新的二维半导体大分子，以研究光伏效应。所提出的二维大分子包括盘状液晶(LC)和窄带隙低聚物臂。盘状液晶材料形成自组装的强烈倾向将被用来增强pi-pi相互作用，这将导致更高的载流子迁移率。所得到的组装体将具有允许插入富勒胺衍生物(PCBM)以形成互穿网络而不中断pi-pi堆积的空隙。这是一种理想的形貌，有利于电荷分离和电荷传输，有利于提高所得到的太阳能电池的性能。为了进一步与平面核心化合物偶联，将合成具有低禁带宽度和合适官能团的新型共轭低聚物。对这些新型大分子进行了详细的合成和表征。将对这些大分子及其相应的组装体进行广泛的结构、光谱和形态表征。将在不同的成分和工艺条件下对太阳能电池的性能进行系统的研究。这一结果将为高效太阳能电池的结构/性能关系和新材料提供有洞察力的信息。非技术概述：该奖项旨在从概念上开发用于太阳能电池应用的新型二维半导体大分子。对这些新型大分子的合成和表征进行了基础性研究。这一结果将为高效太阳能电池的结构/性能关系和新材料提供有洞察力的信息。拟议中的材料将把有机太阳能电池的电力转换效率提高到10%，并使这些设备能够用于商业产品。这项研究活动可以对国家和全球开发新的、可持续的能源战略和技术的努力产生影响，从而对我国的经济产生影响，并通过减少化石燃料的使用来改善环境质量。这一研究项目为参与研究的学生提供了体验跨学科培训和学习应对未来科学挑战的技能的机会。拟议的材料将吸引行业合作伙伴和国际合作者的兴趣。这个项目提供了平台，让学生与工业和国际研究团体建立合作关系，并认识到可再生能源研究的重要性。

TECHNICAL SUMMARY:This award is aimed at developing conceptually new two-dimensional semiconducting macromolecules to investigate photovoltaic effect. The proposed two-dimensional macromolecules include discotic liquid crystal (LC) and narrow bad gap oligomer arms. The strong tendency in discotic LC materials to form self assemblies will be used to enhance pi-pi interaction, which will lead to higher charge carriers' mobility. The resulting assembly will possess void spaces that allow the insertion of fulleride derivatives (PCBM) to form interpenetrating networks without interrupting the pi-pi stacking. It is an ideal morphology that will facilitate charge separation and charge transport and benefit the enhancement of the performances of resulting solar cells. New conjugated oligomers with low bandgap and suitable functional groups will be synthesized for further coupling with planar core compounds. Detailed synthesis and characterization of these new macromolecules are proposed. Extensive structural, spectroscopic and morphological characterizations will be carried out on these macromolecules and their corresponding assemblies. Systematic studies on solar cell performances will be carried out in different compositions and processing conditions. The results will provide insightful information on structure/property relationship and new materials for highly efficient solar cells. NON-TECHNICAL SUMMARY:This award is aimed at developing conceptually new two-dimensional semiconducting macromolecules for solar cell applications. Fundamental research on synthesis and characterization of these new macromolecules is proposed. The results will provide insightful information on structure/property relationship and new materials for highly efficient solar cells. The proposed materials will push the power conversion efficiency of organic solar cells to 10% and make these devices viable for commercial products. This research activity can have an impact on the national and global effort in developing new and sustainable energy strategy and technologies, thus having an impact on our nation's economy and improving environmental quality by reducing the use of fossil fuels. This research project offers the students involved the opportunity to experience interdisciplinary training and learn the skills to face future scientific challenges. The proposed materials will attract interest from industrial partners and international collaborators. This project provides platforms to allow students to establish collaborations with industrial and international research groups and appreciate the importance of renewable energy research.