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Design principles for efficient singlet fission in anthracene-based organic semiconductors

Bae, YounJue, Christensen, Joseph, Kang, Gyeongwon, Malliakas, Christos D., Zhou, Jiawang, Nelson, Jordan, Young, Ryan M., Wu, Yi-Lin ORCID:, Van Duyne, Richard P., Schatz, George, Wasielewski, Michael R., Congreve, Daniel, Bronstein, Hugo A., Nielsen, Christian and Deschler, Felix 2019. Design principles for efficient singlet fission in anthracene-based organic semiconductors. Presented at: SPIE Nanoscience + Engineering 2019, San Diego, CA, USA, 11-15 August 2019. Published in: Nielsen, Christine, Congreve, Daniel, Bronstein, Hugo A. and Deschler, Felix eds. Proceedings Volume 11084, Physical Chemistry of Semiconductor Materials and Interfaces XVIII. Society of Photo-Optical Instrumentation Engineers, p. 24. 10.1117/12.2527346

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Singlet fission (SF) in two or more electronically coupled organic chromophores converts a high-energy singlet exciton into two low-energy triplet excitons, which can be used to increase solar cell efficiency. Many known SF chromophores are unsuitable for device applications due to chemical instability and low triplet state energies. This work summarizes structurally dependent SF dynamics for 9,10-bis(phenylethynyl)anthracene (BPEA) and its derivatives in the solid-state using time-resolved optical spectroscopies, and electronic structure calculations. By modulating the packing structure in thin films, we can effectively tune electronic energy and coupling. The systematic study in BPEA organic semiconductors shows that maximizing the thermodynamic driving force can achieve the highest SF rate and efficiency.

Item Type: Conference or Workshop Item (Paper)
Date Type: Published Online
Status: Published
Schools: Chemistry
Publisher: Society of Photo-Optical Instrumentation Engineers
Date of First Compliant Deposit: 14 October 2019
Date of Acceptance: 15 September 2019
Last Modified: 13 Jan 2023 02:34

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