Premium
Intramolecular Singlet Fission in Oligoacene Heterodimers
Author(s) -
Sanders Samuel N.,
Kumarasamy Elango,
Pun Andrew B.,
Steigerwald Michael L.,
Sfeir Matthew Y.,
Campos Luis M.
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201510632
Subject(s) - singlet fission , singlet state , pentacene , chromophore , acene , intramolecular force , fission , chemical physics , chemistry , atomic physics , photochemistry , materials science , physics , nanotechnology , stereochemistry , excited state , molecule , nuclear physics , organic chemistry , neutron , thin film transistor , layer (electronics)
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.