Abstract
Singlet fission (SF) in two or more electronically coupled organic chromophores converts a high-energy singlet exciton into two low-energy triplet excitons, which can be used to increase solar cell efficiency. Many known SF chromophores are unsuitable for device applications due to chemical instability and low triplet state energies. This work summarizes structurally dependent SF dynamics for 9,10-bis(phenylethynyl)anthracene (BPEA) and its derivatives in the solid-state using time-resolved optical spectroscopies, and electronic structure calculations. By modulating the packing structure in thin films, we can effectively tune electronic energy and coupling. The systematic study in BPEA organic semiconductors shows that maximizing the thermodynamic driving force can achieve the highest SF rate and efficiency.
Original language | English (US) |
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Title of host publication | Physical Chemistry of Semiconductor Materials and Interfaces XVIII |
Editors | Christian Nielsen, Daniel Congreve, Hugo A. Bronstein, Felix Deschler |
Publisher | SPIE |
ISBN (Electronic) | 9781510628618 |
DOIs | |
State | Published - 2019 |
Event | Physical Chemistry of Semiconductor Materials and Interfaces XVIII 2019 - San Diego, United States Duration: Aug 11 2019 → Aug 13 2019 |
Publication series
Name | Proceedings of SPIE - The International Society for Optical Engineering |
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Volume | 11084 |
ISSN (Print) | 0277-786X |
ISSN (Electronic) | 1996-756X |
Conference
Conference | Physical Chemistry of Semiconductor Materials and Interfaces XVIII 2019 |
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Country/Territory | United States |
City | San Diego |
Period | 8/11/19 → 8/13/19 |
Funding
This work was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award DE-FG02-99ER14999 (M.R.W.). G.K., R.P.V.D., and G.C.S. acknowledge support from the Air Force Office of Scientific Research MURI (FA9550-14-1-0003). GK and GCS (theory work) acknowledge the LEAP Center, DOE grant DE-SC0001059. Y.B. thanks Phi Lamda Upsilon and Northwestern University for travel grant.
Keywords
- Anthracene
- Frankel Excitons
- Organic Semiconductors
- Singlet Fission
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering