Spectroscopic signatures of short- and long-range excitonic interactions in organic photovoltaic materials

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日期	2023-05-15

時間	12:10-13:10

地點	R36169, 1F, Dept. of Physics, Building of Science College, NCKU

領域	Quantum Information Science

講者	莊宸教授 - 美國內華達大學拉斯維加斯分校化學與生物化學系

題目	Spectroscopic signatures of short- and long-range excitonic interactions in organic photovoltaic materials

摘要	A large class of organic chromophores form self-assembled aggregates consisting up to 10^5 molecules on micron scale. Their exotic photophysical properties imply interesting chemical physics principles and promise useful optoelectronic applications. However, the microscopic details of these supramolecular structures as well as those of the excitonic interactions among constituent chromophores, critically responsible for the said exotic photophysics, continue to evade conclusive and systematic characterization even nearly a century after their discovery. In this talk I will cover the fundamental challenges and some of the theoretical insights obtained in our ongoing effort in studying these systems, primarily in identifying key inter-relationships between spectroscopic signatures and structural parameters. Prospects in applying and generalizing these principles to related systems will be discussed. [1] J. Phys. Chem. C (2019), 123, 18702. [2] Chem (2019), 5, 1. [3] Phys. Rev. Lett. (2021), 127, 047402. [4] Chem. Phys. Rev. (2022), 3, 021401. [5] 10.26434/chemrxiv-2022-5m8sx

2023-05-10 10:06:00 ~ 2023-05-15 13:10:00