CAREER: Charge Carrier Dynamics in Organic Semiconductors: from Macroscopic to Microscopic Level

该奖项由材料研究部门的电子材料项目和化学部门的实验物理化学项目共同资助。技术方面：本项目从宏观和微观层面研究有机半导体中的载流子动力学，最终目标是开发单分子光电器件中利用电荷转移过程的方法。分子间电荷转移导致电导率的机制将使用光电导率技术的组合进行研究：时间分辨发光、单分子荧光显微镜和电显微镜。该项目是研究功能化多环芳烃和蒽噻吩。它的目的是(i)建立电荷光产生、传输和捕获的机制，并模拟光导性能；（ii）在单分子水平上观察和描述电荷捕获和脱陷过程；（iii）在微观尺度上测量载流子迁移率及其对局部环境的依赖；(4)设计基于电荷俘获特性的单分子器件。非技术领域：本项目针对材料科学中具有高技术相关性的主题领域的基础研究问题，并期望为有机半导体提供新的科学认识，有机半导体在薄膜晶体管、发光二极管、太阳能电池和激光器等领域具有潜在的应用前景。该项目的研究部分与教育部分相结合，旨在实现四个主要目标：(i)通过参与研究小组活动，为本科生和高中生提供学习和研究经验；（ii）在课程中引入研究背景，开发一门先进光学材料的新课程和一个基于网络的教程，说明有机光学材料的物理和应用；（iii）为公众提供接触现代科学技术的机会；（四）吸引女性从事物理学事业。

This CAREER award is co-funded by the Electronic Materials Program in the Division of Materials Research and the Experimental Physical Chemistry Program in the Chemistry Division.Technical: The project is to study charge carrier dynamics in organic semiconductors on the macroscopic and microscopic levels with the final goal of developing methodology for utilizing charge-transfer processes in single-molecule optoelectronic devices. Mechanisms of intermolecular charge transfer responsible for conductivity will be investigated using a combination of photoconductivity techniques: time-resolved luminescence, single-molecule fluorescence microscopy, and electric force microscopy. The project is to study functionalized polyacenes and anthradithiophenes. It aims (i) to establish mechanisms of charge photogeneration, transport and trapping and to model the photoconductive performance; (ii) to observe and characterize charge trapping and detrapping processes on the single molecule level; (iii) to measure charge carrier mobility on the microscopic scales and its dependence on local environment; and (iv) to design single-molecule devices based on charge trapping properties.Non-technical: The project addresses basic research issues in a topical area of materials science with high technological relevance, and is expected to provide new scientific understanding of organic semiconductors, which have potential applications in thin-film transistors, light emitting diodes, solar cells, and lasers. The research component of the project is integrated with the educational component that will aim to achieve four main goals: (i) to provide learning and research experience to undergraduate and high-school students through their involvement in the research group activities; (ii) to introduce research context in the curriculum, to develop a novel course in advanced optical materials and a web-based tutorial illustrating physics and applications of organic optical materials; (iii) to provide exposure to modern science and technology for general public; and (iv) to attract women to careers in physics.