Enhanced external quantum efficiency in an organic photovoltaic cell via singlet fission exciton sensitizer

Author(s)
Reusswig, Philip David; Congreve, Daniel Norbert; Thompson, Nicholas J.; Baldo, Marc A.
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Abstract
We demonstrate bilayer organic photovoltaic cells that incorporate a singlet exciton fission sensitizer layer to increase the external quantum efficiency (EQE). This solar cell architecture is realized by pairing the singlet exciton donor layer tris[4-(5-phenylthiophen-2-yl)phenyl]amine (TPTPA) with the singlet exciton fission layer 5,6,11,12-tetraphenylnaphthacene (rubrene). The presence of the rubrene layer at the donor-acceptor interface allows for a singlet generated in TPTPA to undergo singlet exciton fission with a corresponding doubling in the TPTPA EQE from 12.8% to 27.6%. This scheme de-couples singlet exciton fission from photon absorption, exciton diffusion, and charge transport for very high EQE organic photovoltaic cells.
Date issued
2012-09
URI
http://hdl.handle.net/1721.1/85957
Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Department of Materials Science and Engineering
Journal
Applied Physics Letters
Publisher
American Institute of Physics (AIP)
Citation
Reusswig, P. D., D. N. Congreve, N. J. Thompson, and M. A. Baldo. “Enhanced External Quantum Efficiency in an Organic Photovoltaic Cell via Singlet Fission Exciton Sensitizer.” Appl. Phys. Lett. 101, no. 11 (2012): 113304. © 2012 American Institute of Physics
Version: Final published version
ISSN
00036951
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