Investigating the Relationship Between Molecular Relaxation and Exciton Diffusion in Organic Semiconductor Materials

在固态与材料化学项目和电子与光子材料项目的联合支持下，明尼苏达大学双子城分校的Holmes教授和Blank教授研究了激发态弛豫过程如何影响有机半导体中激子能量转移和扩散的速率。这项工作旨在更好地理解分子激发态动力学和观察到的激子扩散长度（LD）之间的复杂关系，并旨在为实质性增强材料和器件（如有机光伏）中的LD提供所需的设计原则。所提出的工作对激子有机器件的设计具有潜在的影响，包括提高光发射和光电转换的效率，这对能量转换和消耗的关键问题有直接的影响。该项目还为研究生、本科生和高中生提供了跨学科的研究机会。

Under the joint support of the Solid State and Materials Chemistry Program and the Electronic and Photonic Materials Program, Prof. Holmes and Prof. Blank of the University of Minnesota-Twin Cities investigate how excited state relaxation processes impact the rate of excitonic energy transfer and diffusion in organic semiconductors. This work is directed at better understanding the complex relationship between the molecular excited state dynamics and the observed exciton diffusion length (LD) and aims to provide design principles required for a substantial enhancement of LD in materials and devices such as organic photovoltaics. The proposed work has potential impact in the design of excitonic organic devices, including improvements in the efficiency of both light emission and conversion of sunlight to electricity, which has a direct impact on the critical issues of energy conversion and consumption. This project also provides interdisciplinary research opportunities for graduate, undergraduate and high school students.