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A perspective on triplet fusion upconversion: triplet sensitizers beyond quantum dots

Published online by Cambridge University Press:  02 September 2019

Zachary A. VanOrman ,
Alexander S. Bieber ,
Sarah Wieghold  and
Lea Nienhaus Open the ORCID record for Lea Nienhaus [Opens in a new window]
Zachary A. VanOrman
Affiliation:
Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, FL 32306, USA
Alexander S. Bieber
Affiliation:
Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, FL 32306, USA
Sarah Wieghold
Affiliation:
Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, FL 32306, USA
Lea Nienhaus*
Affiliation:
Department of Chemistry and Biochemistry, Florida State University, 95 Chieftan Way, Tallahassee, FL 32306, USA
*
Address all correspondence to Lea Nienhaus at lnienhaus@fsu.edu
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Abstract

The processes of singlet fission and triplet fusion could allow state-of-the-art photovoltaic devices to surpass the Shockley–Queisser limit by optimizing the utilized solar spectrum by reducing thermal relaxation and inaccessible sub-bandgap photons, respectively. Triplet fusion demands precise control of the spin-triplet state population, and requires a sensitizer to efficiently populate the triplet state of an acceptor molecule. In this perspective, we highlight the established field of sensitized upconversion and further examine alternative triplet sensitization routes, including the possibility of bulk solid-state semiconductors as triplet sensitizers, which provide a new avenue for charge transfer-based triplet sensitization rather than excitonic triplet energy transfer.

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Prospective Articles
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MRS Communications , Volume 9 , Issue 3 , September 2019 , pp. 924 - 935
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Copyright © Materials Research Society 2019 

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Footnotes

†

These authors contributed equally to this work.

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