Quantifying singlet fission in novel organic materials using nonlinear optics

Erik Busby, Jianlong Xia, Omer Yaffe, Bharat Kumar, Timothy Berkelbach, Qin Wu, John Miller, Colin Nuckolls, Xiaoyang Zhu, David Reichman, Luis Campos, Matthew Y. Sfeir

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Singlet fission is a form of multiple exciton generation in which two triplet excitons are produced from the decay of a photoexcited singlet exciton. In a small number of organic materials, most notably pentacene, this conversion process has been shown to occur with unity quantum yield on sub-ps timescales. However, a poorly understood mechanism for fission along with strict energy and geometry requirements have so far limited the observation of this process to a few classes of organic materials, with only a subset of these (most notably the polyacenes) showing both efficient fission and long-lived triplets. Here, we utilize novel organic materials to investigate how the efficiency of the fission process depends on the coupling and the energetic driving force between chromophores in both intra- And intermolecular singlet fission materials. We demonstrate how the triplet yield can be accurately quantified using a combination of traditional transient spectroscopies and recently developed excited state saturable absorption techniques. These results allow us to gain mechanistic insight into the fission process and suggest general strategies for generating new materials that can undergo efficient fission.

Original languageEnglish
Title of host publicationLight Manipulating Organic Materials and Devices
EditorsJean-Michel Nunzi
ISBN (Electronic)9781628412086
StatePublished - 2014
Externally publishedYes
EventLight Manipulating Organic Materials and Devices - San Diego, United States
Duration: 20 Aug 201421 Aug 2014

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceLight Manipulating Organic Materials and Devices
Country/TerritoryUnited States
CitySan Diego

Bibliographical note

Publisher Copyright:
© 2014 SPIE.


  • Excited state saturable absorption
  • Hexacene
  • Intramolecular singlet fission
  • Multiple exciton generation
  • Nonlinear optics
  • Polyacenes
  • Singlet fission
  • Transient absorption


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