Solution-processable, crystalline material for quantitative singlet fission

Ryan D. Pensack; Christopher Grieco; Geoffrey E. Purdum; Samuel M. Mazza; Andrew J. Tilley; Evgeny E. Ostroumov; Dwight S. Seferos; Yueh-Lin Loo; John B. Asbury; John E. Anthony; Gregory D. Scholes

doi:10.1039/C7MH00303J

Solution-processable, crystalline material for quantitative singlet fission†

Ryan D. Pensack,^a Christopher Grieco,^b Geoffrey E. Purdum,^c Samuel M. Mazza,^d Andrew J. Tilley,^e Evgeny E. Ostroumov,^a Dwight S. Seferos,

^e Yueh-Lin Loo,

^cf John B. Asbury,

^b John E. Anthony*^d and Gregory D. Scholes

*^a

Author affiliations

* Corresponding authors

^a Department of Chemistry, Princeton University, Princeton, New Jersey, USA
E-mail: gscholes@princeton.edu

^b Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, USA

^c Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, USA

^d Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, USA
E-mail: anthony@uky.edu

^e Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada

^f Andlinger Center for Energy and the Environment, Princeton University, Princeton, New Jersey 08544, USA

Abstract

Amorphous nanoparticles of the singlet fission chromophore 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-Pn) are fully crystallized through co-precipitation with a chemical additive. Time-resolved measurements indicate that singlet fission in the crystalline nanoparticles is quantitative, or lossless, whereas losses are evident in the amorphous nanoparticles as a result of frustrated triplet pair separation. Because triplet pairs form rapidly and separate slowly in amorphous material, mixed-phase samples are unable to compensate for these losses.

This article is part of the themed collection: 7th EuCheMS Chemistry Congress – Molecular frontiers and global challenges

Materials Horizons

Solution-processable, crystalline material for quantitative singlet fission†

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Solution-processable, crystalline material for quantitative singlet fission

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