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.
Sanders, Samuel N., Kumarasamy, Elango, Pun, Andrew B., Steigerwald, Michael L., Sfeir, Matthew L., & Campos, Luis M. (2016). Intramolecular Singlet Fission in Oligoacene Heterodimers. Angewandte Chemie (Online), 128(10). https://doi.org/10.1002/ange.201510632
Sanders, Samuel N., Kumarasamy, Elango, Pun, Andrew B., et al., "Intramolecular Singlet Fission in Oligoacene Heterodimers," Angewandte Chemie (Online) 128, no. 10 (2016), https://doi.org/10.1002/ange.201510632
@article{osti_1329779,
author = {Sanders, Samuel N. and Kumarasamy, Elango and Pun, Andrew B. and Steigerwald, Michael L. and Sfeir, Matthew L. and Campos, Luis M.},
title = {Intramolecular Singlet Fission in Oligoacene Heterodimers},
annote = {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},
url = {https://www.osti.gov/biblio/1329779},
journal = {Angewandte Chemie (Online)},
issn = {ISSN 1521-3757},
number = {10},
volume = {128},
place = {United States},
publisher = {German Chemical Society},
year = {2016},
month = {02}}