Unified model for singlet fission within a non-conjugated covalent pentacene dimer

Bettina S. Basel, Johannes Zirzlmeier, Constantin Hetzer, Brian T. Phelan, Matthew D. Krzyaniak, S. Rajagopala Reddy, Pedro B. Coto, Noah E. Horwitz, Ryan M. Young, Fraser J. White, Frank Hampel, Timothy Clark, Michael Thoss, Rik R. Tykwinski, Michael R Wasielewski, Dirk M. Guldi

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

When molecular dimers, crystalline films or molecular aggregates absorb a photon to produce a singlet exciton, spin-allowed singlet fission may produce two triplet excitons that can be used to generate two electron-hole pairs, leading to a predicted 1/450% enhancement in maximum solar cell performance. The singlet fission mechanism is still not well understood. Here we report on the use of time-resolved optical and electron paramagnetic resonance spectroscopy to probe singlet fission in a pentacene dimer linked by a non-conjugated spacer. We observe the key intermediates in the singlet fission process, including the formation and decay of a quintet state that precedes formation of the pentacene triplet excitons. Using these combined data, we develop a single kinetic model that describes the data over seven temporal orders of magnitude both at room and cryogenic temperatures.

Original languageEnglish
Article number15171
JournalNature Communications
Volume8
DOIs
Publication statusPublished - May 18 2017

Fingerprint

Dimers
fission
dimers
excitons
Electron Spin Resonance Spectroscopy
Photons
Cryogenics
Paramagnetic resonance
Spectrum Analysis
Solar cells
cryogenic temperature
Spectroscopy
Electrons
spacers
Crystalline materials
electron paramagnetic resonance
Kinetics
Temperature
solar cells
pentacene

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Basel, B. S., Zirzlmeier, J., Hetzer, C., Phelan, B. T., Krzyaniak, M. D., Reddy, S. R., ... Guldi, D. M. (2017). Unified model for singlet fission within a non-conjugated covalent pentacene dimer. Nature Communications, 8, [15171]. https://doi.org/10.1038/ncomms15171

Unified model for singlet fission within a non-conjugated covalent pentacene dimer. / Basel, Bettina S.; Zirzlmeier, Johannes; Hetzer, Constantin; Phelan, Brian T.; Krzyaniak, Matthew D.; Reddy, S. Rajagopala; Coto, Pedro B.; Horwitz, Noah E.; Young, Ryan M.; White, Fraser J.; Hampel, Frank; Clark, Timothy; Thoss, Michael; Tykwinski, Rik R.; Wasielewski, Michael R; Guldi, Dirk M.

In: Nature Communications, Vol. 8, 15171, 18.05.2017.

Research output: Contribution to journalArticle

Basel, BS, Zirzlmeier, J, Hetzer, C, Phelan, BT, Krzyaniak, MD, Reddy, SR, Coto, PB, Horwitz, NE, Young, RM, White, FJ, Hampel, F, Clark, T, Thoss, M, Tykwinski, RR, Wasielewski, MR & Guldi, DM 2017, 'Unified model for singlet fission within a non-conjugated covalent pentacene dimer', Nature Communications, vol. 8, 15171. https://doi.org/10.1038/ncomms15171
Basel BS, Zirzlmeier J, Hetzer C, Phelan BT, Krzyaniak MD, Reddy SR et al. Unified model for singlet fission within a non-conjugated covalent pentacene dimer. Nature Communications. 2017 May 18;8. 15171. https://doi.org/10.1038/ncomms15171
Basel, Bettina S. ; Zirzlmeier, Johannes ; Hetzer, Constantin ; Phelan, Brian T. ; Krzyaniak, Matthew D. ; Reddy, S. Rajagopala ; Coto, Pedro B. ; Horwitz, Noah E. ; Young, Ryan M. ; White, Fraser J. ; Hampel, Frank ; Clark, Timothy ; Thoss, Michael ; Tykwinski, Rik R. ; Wasielewski, Michael R ; Guldi, Dirk M. / Unified model for singlet fission within a non-conjugated covalent pentacene dimer. In: Nature Communications. 2017 ; Vol. 8.
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AU - Krzyaniak, Matthew D.

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AU - White, Fraser J.

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AU - Clark, Timothy

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