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: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=589951
• 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有硒和碲的新型材料方面的研究计划，这些材料具有多种应用，包括太阳能。首要目标是通过明智地掺入金属和半金属原子，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器件（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，结构和组成与固态性能的关系。同时，将合成新的聚合物图案，包括在其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态裂变（SF）的程序。SF是有机物质特有的过程，其中光子的吸收导致两个电荷载流子的产生。这有可能大大提高太阳能电池的效率。尽管自20世纪60年代以来，小分子中的SF就已为人所知，但聚合物对于最终实现为器件将更加有用。在这个项目中，我们将制备含有SF小分子结构基序的新聚合物。我们将使用我们的制造设施来开发使用这些聚合物通过SF机制操作的太阳能电池。该项目将对能源和材料产生长期影响，并将培训学生进行多学科研究，以便在工业，学术界和政府部门就业。