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

在固体与材料化学计划和电子与光子材料计划的共同支持下，明尼苏达双城大学的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的能量转移和扩散速度。这项工作旨在更好地理解分子激发态动力学与观察到的激子扩散长度(LD)之间的复杂关系，并旨在为大幅提高激子扩散长度在材料和器件(如有机光伏)中的应用提供设计原则。拟议的工作对激子有机器件的设计具有潜在的影响，包括提高光发射和太阳光到电能的转换效率，这直接影响到能量转换和消耗的关键问题。该项目还为研究生、本科生和高中生提供跨学科的研究机会。

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.