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Polariton-assisted excitation energy channeling in organic heterojunctions

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  • Mao Wang

    (University of Gothenburg)

  • Manuel Hertzog

    (University of Gothenburg)

  • Karl Börjesson

    (University of Gothenburg)

Abstract

Exciton-polaritons are hybrid light-matter states resulting from strong exciton-photon coupling. The wave function of the polariton is a mixture of light and matter, enabling long-range energy transfer between spatially separated chromophores. Moreover, their delocalized nature, inherited from the photon component, has been predicted to enhance exciton transport. Here, we strongly couple an organic heterojunction consisting of energy/electron donor and acceptor materials to the same cavity mode. Using time-resolved spectroscopy and optoelectrical characterization, we show that the rate of exciton harvesting is enhanced with one order of magnitude and the rate of energy transfer in the system is increased two- to threefold in the strong coupling regime. Our results exemplify two means of efficiently channeling excitation energy to a heterojunction interface, where charge separation can occur. This study opens a new door to increase the overall efficiency of light harvesting systems using the tool of strong light-matter interactions.

Suggested Citation

  • Mao Wang & Manuel Hertzog & Karl Börjesson, 2021. "Polariton-assisted excitation energy channeling in organic heterojunctions," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-22183-3
    DOI: 10.1038/s41467-021-22183-3
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    Cited by:

    1. Chiao-Yu Cheng & Nina Krainova & Alyssa N. Brigeman & Ajay Khanna & Sapana Shedge & Christine Isborn & Joel Yuen-Zhou & Noel C. Giebink, 2022. "Molecular polariton electroabsorption," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    2. Fan Wu & Daniel Finkelstein-Shapiro & Mao Wang & Ilmari Rosenkampff & Arkady Yartsev & Torbjörn Pascher & Tu C. Nguyen- Phan & Richard Cogdell & Karl Börjesson & Tönu Pullerits, 2022. "Optical cavity-mediated exciton dynamics in photosynthetic light harvesting 2 complexes," Nature Communications, Nature, vol. 13(1), pages 1-7, December.

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