Steering the multiexciton generation in slip-stacked perylene dye array via exciton coupling

Yongseok Hong, Maximilian Rudolf, Munnyon Kim, Juno Kim, Tim Schembri, Ana Maria Krause, Kazutaka Shoyama, David Bialas, Merle I.S. Röhr, Taiha Joo, Hyungjun Kim, Dongho Kim, Frank Würthner

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Dye arrays from dimers up to larger oligomers constitute the functional units of natural light harvesting systems as well as organic photonic and photovoltaic materials. Whilst in the past decades many photophysical studies were devoted to molecular dimers for deriving structure-property relationship to unravel the design principles for ideal optoelectronic materials, they fail to accomplish the subsequent processes of charge carrier generation or the detachment of two triplet species in singlet fission (SF). Here, we present a slip-stacked perylene bisimide trimer, which constitutes a bridge between hitherto studied dimer and solid-state materials, to investigate SF mechanisms. This work showcases multiple pathways towards the multiexciton state through direct or excimer-mediated mechanisms by depending upon interchromophoric interaction. These results suggest the comprehensive role of the exciton coupling, exciton delocalization, and excimer state to facilitate the SF process. In this regard, our observations expand the fundamental understanding the structure-property relationship in dye arrays.

Original languageEnglish
Article number4488
JournalNature communications
Volume13
Issue number1
DOIs
Publication statusPublished - 2022 Dec

Bibliographical note

Publisher Copyright:
© 2022, The Author(s).

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Biochemistry,Genetics and Molecular Biology
  • General
  • General Physics and Astronomy

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