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Title: Intramolecular Singlet Fission in Oligoacene Heterodimers

Abstract

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.

Authors:
 [1];  [1];  [1];  [1];  [2];  [1]
  1. Columbia Univ., New York, NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1329779
Report Number(s):
BNL-112602-2016-JA
Journal ID: ISSN 1521-3757; R&D Project: 16063; 16058; KC0403020
Grant/Contract Number:  
SC00112704
Resource Type:
Accepted Manuscript
Journal Name:
Angewandte Chemie (Online)
Additional Journal Information:
Journal Name: Angewandte Chemie (Online); Journal Volume: 128; Journal Issue: 10; Journal ID: ISSN 1521-3757
Publisher:
German Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Center for Functional Nanomaterials

Citation Formats

Sanders, Samuel N., Kumarasamy, Elango, Pun, Andrew B., Steigerwald, Michael L., Sfeir, Matthew L., and Campos, Luis M. Intramolecular Singlet Fission in Oligoacene Heterodimers. United States: N. p., 2016. Web. doi:10.1002/ange.201510632.
Sanders, Samuel N., Kumarasamy, Elango, Pun, Andrew B., Steigerwald, Michael L., Sfeir, Matthew L., & Campos, Luis M. Intramolecular Singlet Fission in Oligoacene Heterodimers. United States. doi:10.1002/ange.201510632.
Sanders, Samuel N., Kumarasamy, Elango, Pun, Andrew B., Steigerwald, Michael L., Sfeir, Matthew L., and Campos, Luis M. Tue . "Intramolecular Singlet Fission in Oligoacene Heterodimers". United States. doi:10.1002/ange.201510632. https://www.osti.gov/servlets/purl/1329779.
@article{osti_1329779,
title = {Intramolecular Singlet Fission in Oligoacene Heterodimers},
author = {Sanders, Samuel N. and Kumarasamy, Elango and Pun, Andrew B. and Steigerwald, Michael L. and Sfeir, Matthew L. and Campos, Luis M.},
abstractNote = {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.},
doi = {10.1002/ange.201510632},
journal = {Angewandte Chemie (Online)},
number = 10,
volume = 128,
place = {United States},
year = {2016},
month = {2}
}

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