Selenium and tellurium-based organic materials

硒碲基有机材料

• 批准号: RGPIN-2015-04685
• 负责人: Seferos, Dwight
• 金额: $ 5.39万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=691727
• 关键词: Selenium; tellurium; based; organic; materials

This proposal describes our research program in the creation of novel materials that contain selenium and tellurium with multiple applications including solar energy. The overarching goal is to transform high carbon-content electronic materials into better semiconductors through the judicious incorporation of metal and semimetal atoms. I propose a suite of new tellurium-containing materials that include polymers, graphene, and molecular frameworks. We will examine these systems as solids and as electronic devices (solar cells and transistors). Another part of this program is aimed at unraveling the phase behavior of selenium-containing block copolymers. Our goals are to synthesize a variety of compositions and develop a deep understanding of how polymer chain length, structure, and composition relate to solid-state properties. In parallel new polymer motifs will be synthesized including circular and bottlebrush-type polymers that contain selenium in their structure. In a third research thrust, I propose to build a program on singlet fission (SF). SF is a process that is unique to organic matter, where the absorption of a photon leads to the generation of two charge carriers. This has the potential to greatly improve solar cell efficiency. Whereas SF in small molecules has been known since the 1960s, polymers would be much more useful for eventual implementation as devices. For this project we will prepare new polymers that contain the structural motifs of SF small-molecules. We will use our fabrication facility to develop solar cells that use these polymers to operate by the SF mechanism. The project will have a long-term impact in energy and materials and will train students in multidisciplinary research for employment in industry, academia and government. *****************************

该提案描述了我们在创造含硒和碲的新型材料方面的研究计划，该材料具有多种应用，包括太阳能。总体目标是通过明智地结合金属和半金属原子，将高碳含量的电子材料转化为更好的半导体。我提出了一套新的含碲材料，包括聚合物、石墨烯和分子框架。我们将把这些系统作为固体和电子设备（太阳能电池和晶体管）来研究。该计划的另一部分旨在揭示含硒嵌段共聚物的相行为。我们的目标是合成各种组合物，并深入了解聚合物链长度、结构和组成与固态特性的关系。与此同时，新的聚合物图案将被合成，包括结构中含有硒的圆形和瓶刷型聚合物。在第三个研究重点中，我建议建立一个关于单线态裂变（SF）的项目。 SF 是有机物特有的过程，其中光子的吸收导致产生两个电荷载流子。这有可能大大提高太阳能电池的效率。虽然小分子中的 SF 自 20 世纪 60 年代以来就已为人所知，但聚合物对于最终作为设备的实现来说会更有用。对于这个项目，我们将制备包含 SF 小分子结构基序的新聚合物。我们将利用我们的制造设施来开发使用这些聚合物通过 SF 机制运行的太阳能电池。该项目将对能源和材料领域产生长期影响，并将培养学生进行多学科研究，以便在工业界、学术界和政府部门就业。 ******************************