Intramolecular Singlet Fission in Oligoacene Heterodimers

Sanders, Samuel N.; Kumarasamy, Elango; Pun, Andrew B.; Steigerwald, Michael L.; Sfeir, Matthew L.; Campos, Luis M.

doi:10.1002/ange.201510632

Title: Intramolecular Singlet Fission in Oligoacene Heterodimers

Journal Article · Tue Feb 02 00:00:00 EST 2016 · Angewandte Chemie (Online)

DOI:https://doi.org/10.1002/ange.201510632· OSTI ID:1329779

Sanders, Samuel N. ^[1]; Kumarasamy, Elango ^[1]; Pun, Andrew B. ^[1]; Steigerwald, Michael L. ^[1]; Sfeir, Matthew L. ^[2]; Campos, Luis M. ^[1]

Columbia Univ., New York, NY (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)

In this Communication we investigate singlet fission (SF) in heterodimers comprising a pentacene unit covalently bonded to another acene as we systematically vary the singlet and triplet pair energies. We find that these energies control the SF process, where dimers undergo SF provided that the resulting triplet pair energy is similar or lower in energy than the singlet state. In these systems the singlet energy is determined by the lower energy chromophore, and the rate of SF is found to be relatively independent of the driving force. However, triplet pair recombination in these heterodimers follows the energy gap law. The ability to tune the energies of these materials provides a key strategy to study and design new SF materials – an important process for third generation photovoltaics.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC00112704

OSTI ID:: 1329779

Report Number(s):: BNL-112602-2016-JA; R&D Project: 16063; 16058; KC0403020

Journal Information:: Angewandte Chemie (Online), Vol. 128, Issue 10; ISSN 1521-3757

Publisher:: German Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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