CAREER: Heavy Metal Complexes as Triplet Absorbers for Organic Photovoltaics

该CAREER奖在无机，生物无机和有机化学计划支持教授李健在亚利桑那州州立大学开发一系列稳定的金属络合物和聚合物材料作为活性材料的光伏应用。所提出的金属络合物吸收剂将被设计为具有扩展的吸收光谱，从而改善与太阳能源的匹配，并且由于金属离子的掺入而改变有机吸收剂的激子性质，这将导致材料中的长激子扩散长度。 具体的研究目标包括：（1）合成新型有机/金属有机化合物并研究其物理和电化学性质;（2）测量所提出材料的电荷迁移率和激子扩散长度，并将材料的结构变化与有机薄膜的性质联系起来;（3）研究有机固体中电荷输运和能量传递的机理和过程;（4）在本计划结束时实现功率转换效率为10%或更高的有机光伏电池。这项研究直接解决了提高有机太阳能电池功率转换效率的一些关键挑战。从事该项目的学生将学习现代有机合成，器件物理和工程，以及材料和器件表征。教育目标包括：（1）开发一个关于太阳能发电的教育模块，以覆盖大量K-8学生和教师（每年超过20 000人）;（2）通过提供暑期辅导和为高中高级班创建教育模块，与当地高中进行外联。教育模块，太阳能发电，将与目前现有的科学是有趣的计划。该计划培训本科实习生每年访问70多所学校，并为20，000多名学生和教师做数百次演讲。教育外联活动将针对代表性不足的主要群体，包括少数族裔学生和女生。

This CAREER award in the Inorganic, Bioinorganic and Organometallic Chemistry program supports Professor Jian Li at Arizona State University to develop a range of stable metal-complex and polymeric materials as active materials for photovoltaic applications. The proposed metal-complex absorbers will be designed to have extended absorption spectra, resulting in an improved matching to the solar source, and modified exciton properties of organic absorbers due to the incorporation of metal ions, which will lead to long exciton diffusion lengths in the materials. Specific research aims include: (1) synthesizing novel organic/organometallic compounds and studying their photophysical and electrochemical properties; (2) measuring the charge mobility and exciton diffusion length of the proposed materials, and correlating the structural changes of materials and properties of organic thin films; (3) studying the mechanisms and processes of charge transport and energy transfer in the organic solids; (4) achieving organic photovoltaic cells with 10% power conversion efficiency or higher at the end of this program. This research directly addresses some critical challenges in improving the power conversion efficiency of organic solar cells. Students working on this project will learn modern organic synthesis, device physics and engineering, as well as materials and device characterization. The educational aims include: (1) developing an educational module on solar electricity to reach a large number of K-8 students and teachers (over 20,000 per year); (2) outreach to local high schools by providing summer mentorship and creating educational modules for high school advanced-placement classes. The educational module, Solar Electricity, will be integrated with current existing Science is Fun program. This program trains undergraduate interns to visit more than 70 schools annually and give several hundred presentations to over 20,000 students and teachers. Educational outreach will target key underrepresented groups, including minority as well as female students.