Slow light enhanced singlet exciton fission solar cells with a 126% yield of electrons per photon

Author(s)
Thompson, Nicholas J.; Goldberg, David; Menon, Vinod M.; Congreve, Daniel Norbert; Baldo, Marc A
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Abstract
Singlet exciton fission generates two triplet excitons per absorbed photon. It promises to increase the power extracted from sunlight without increasing the number of photovoltaic junctions in a solar cell. We demonstrate solar cells with an external quantum efficiency of 126% by enhancing absorption in thin films of the singlet exciton fission material pentacene. The device structure exploits the long photon dwell time at the band edge of a distributed Bragg reflector to achieve enhancement over a broad range of angles. Measuring the reflected light from the solar cell establishes a lower bound of 137% for the internal quantum efficiency.
Date issued
2013-12
URI
http://hdl.handle.net/1721.1/85952
Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Department of Materials Science and Engineering; Massachusetts Institute of Technology. Energy Frontier Research Center for Excitonics
Journal
Applied Physics Letters
Publisher
Association for Computing Machinery (ACM)
Citation
Thompson, Nicholas J., Daniel N. Congreve, David Goldberg, Vinod M. Menon, and Marc A. Baldo. “Slow Light Enhanced Singlet Exciton Fission Solar Cells with a 126% Yield of Electrons Per Photon.” Appl. Phys. Lett. 103, no. 26 (2013): 263302. © 2013 AIP Publishing LLC
Version: Final published version
ISSN
00036951
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