【T²CoMSA Forum】

Speaker: Prof. Chern Chuang (Department of Chemistry and Biochemistry, University of Nevada, Las Vegas, USA)

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

Time: 10:30am, Friday, May 26, 2023

Place：4F Lecture Hall, Cosmology Hall NTU (Hybrid, Webex)

臺大次震宇宙館4樓演講廳

Online Link：https://nationaltaiwanuniversity-zbh.my.webex.com/nationaltaiwanuniversity-zbh.my/j.php?MTID=m553688e414cd67982d7df03381b8ea7c
Meeting number: 2554 192 9024
Password: vSt8YMBcP63 (87889622 from phones and video systems)

Abstract

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.

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[2] Chem (2019), 5, 1.
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[4] Chem. Phys. Rev. (2022), 3, 021401.
[5] 10.26434/chemrxiv-2022-5m8sx