U.S.-Japan Cooperative Research: Photoinduced Charge Generation in Polymers

该奖项支持里诺内华多大学的理查德·D·伯克哈特教授和京都大学的山本雅治教授之间为期两年的合作研究项目。本研究项目的目的是评估三重态-三重态湮灭作为一种可行的电荷载流子产生机制在乙烯基聚合物中的作用，以及在惰性聚合物基质中作为分子掺杂剂存在的小分子。山本教授的团队将合成聚合物和小分子类似物，而Burkhart教授的团队将对聚合物的激光激发溶液和固体薄膜进行瞬变吸收光谱，以确定观察到的任何瞬变的身份，特别是寻找瞬变离子。这些实验将在从10K到环境温度的范围内进行。为了评估瞬变物种的衰减率，京都大学将进行纳秒动力学测量。当同时观测到离子和三重态衰变信号时，就有可能确定瞬变离子的形成和三重态三重态湮灭的发生之间是否存在关系。

This award supports a two-year collaborative research project between Professor Richard D. Burkhart of the University of Nevado, Reno and Professor Masahide Yamamoto of the University of Kyoto. The goal of this research project is to evaluate the role of triplet-triplet annihilations as a viable mechanism of charge carrier generation in vinylaromatic polymers as well as small molecules present as molecular dopants in inert polymer matrices. The polymers and small molecule analogues will be synthesized in Professor Yamamoto's group, while transient absorption spectroscopy on laser excited solutions and solid films of the polymers will be carried out by Professor Burkhart's group to determine the identity of any transients observed, looking especially for transient ions. These experiments will be carried out over a range of temperatures from 10K to ambient. To evaluate rates of decay of the transient species, nanosecond kinetic measurements will be carried out at the University of Kyoto. When both ion and triplet decay signals can be observed simultaneously, it will be possible to determine whether or not a relationship exists between the formation of transient ions and the occurrence of triplet-triplet annihilations.