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Identifying triplet pathways in dilute pentacene films

Author

Listed:
  • Daphné Lubert-Perquel

    (Imperial College London)

  • Enrico Salvadori

    (Queen Mary University of London
    University College London)

  • Matthew Dyson

    (Imperial College London
    Eindhoven University of Technology)

  • Paul N. Stavrinou

    (Oxford University)

  • Riccardo Montis

    (Imperial College London)

  • Hiroki Nagashima

    (Kobe University)

  • Yasuhiro Kobori

    (Kobe University
    1-1 Rokkodaicho, Nada-ku)

  • Sandrine Heutz

    (Imperial College London
    Imperial College London)

  • Christopher W. M. Kay

    (University College London
    University of Saarland)

Abstract

Building efficient triplet-harvesting layers for photovoltaic applications requires a deep understanding of the microscopic properties of the components involved and their dynamics. Singlet fission is a particularly appealing mechanism as it generates two excitons from a single photon. However, the pathways of the coupled triplets into free species, and their dependence on the intermolecular geometry, has not been fully explored. In this work, we produce highly ordered dilute pentacene films with distinct parallel and herringbone dimers and aggregates. Using electron paramagnetic resonance spectroscopy, we provide compelling evidence for the formation of distinct quintet excitons in ambient conditions, with intrinsically distinctive electronic and kinetic properties. We find that the ability of quintets to separate into free triplets is promoted in the parallel dimers and this provides molecular design rules to control the triplets, favouring either enhanced photovoltaic efficiency (parallel) or strongly bound pairs that could be exploited for logic applications (herringbone).

Suggested Citation

  • Daphné Lubert-Perquel & Enrico Salvadori & Matthew Dyson & Paul N. Stavrinou & Riccardo Montis & Hiroki Nagashima & Yasuhiro Kobori & Sandrine Heutz & Christopher W. M. Kay, 2018. "Identifying triplet pathways in dilute pentacene films," Nature Communications, Nature, vol. 9(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-06330-x
    DOI: 10.1038/s41467-018-06330-x
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    Cited by:

    1. Guiying He & Emily M. Churchill & Kaia R. Parenti & Jocelyn Zhang & Pournima Narayanan & Faridah Namata & Michael Malkoch & Daniel N. Congreve & Angelo Cacciuto & Matthew Y. Sfeir & Luis M. Campos, 2023. "Promoting multiexciton interactions in singlet fission and triplet fusion upconversion dendrimers," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    2. Nilabja Maity & Woojae Kim & Naitik A. Panjwani & Arup Kundu & Kanad Majumder & Pranav Kasetty & Divji Mishra & Robert Bittl & Jayashree Nagesh & Jyotishman Dasgupta & Andrew J. Musser & Satish Patil, 2022. "Parallel triplet formation pathways in a singlet fission material," Nature Communications, Nature, vol. 13(1), pages 1-14, December.
    3. Yusuke Kawashima & Tomoyuki Hamachi & Akio Yamauchi & Koki Nishimura & Yuma Nakashima & Saiya Fujiwara & Nobuo Kimizuka & Tomohiro Ryu & Tetsu Tamura & Masaki Saigo & Ken Onda & Shunsuke Sato & Yasuhi, 2023. "Singlet fission as a polarized spin generator for dynamic nuclear polarization," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
    4. Ryan D. Dill & Kori E. Smyser & Brandon K. Rugg & Niels H. Damrauer & Joel D. Eaves, 2023. "Entangled spin-polarized excitons from singlet fission in a rigid dimer," Nature Communications, Nature, vol. 14(1), pages 1-7, December.

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