Intramolecular Singlet Fission in Oligoacene Heterodimers
Abstract
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 02, 2016
- Source ID
- 10.1002/anie.201510632
Entities
People
- Andrew B Pun
- Elango Kumarasamy
- Luis M Campos
- Matthew Y. Sfeir
- Michael L Steigerwald
- Samuel N Sanders
Organizations
- American Chemical Society Petroleum Research Fund
- Brookhaven National Laboratory
- Columbia University
- Office of Naval Research