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Singlet Fission in 9,10-Bis(phenylethynyl)anthracene Thin Films

Singlet Fission in 9,10-Bis(phenylethynyl)anthracene Thin Films

Youn Jue Bae, Gyeongwon Kang, Christos D Malliakas, Jordan N Nelson, Jiawang Zhou, Ryan M Young, Yi-Lin Wu, Richard P Van Duyne, George C Schatz, Michael R Wasielewski

J Am Chem Soc. 2018 Nov 14;140(45):15140-15144.

PMID: 30372052

Abstract:

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. The results described here show that efficient SF occurs in polycrystalline thin films of 9,10-bis(phenylethynyl)anthracene (BPEA), a commercial dye that has singlet and triplet energies of 2.40 and 1.11 eV, respectively, in the solid state. BPEA crystallizes into two polymorphs with space groups C2/ c and Pbcn, which undergo SF with kSFA = (109 ± 4 ps)-1 and kSFB = (490 ± 10 ps)-1, respectively. The high triplet energy and efficient SF evidenced from the 180 ± 20% triplet yield make BPEA a promising candidate for enhancing solar cell performance.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP10075851	9,10-Bis(phenylethynyl)anthracene		10075-85-1	Price

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