Mapping the relation between stacking geometries and singlet fission yield in a class of organic crystals

Nicolas Renaud, Paul A. Sherratt, Mark A. Ratner

Research output: Contribution to journalArticle

96 Citations (Scopus)

Abstract

By generating two free charge carriers from a single high-energy photon, singlet fission (SF) promises to significantly improve the efficiency of a class of organic photovoltaics (OPVs). However, SF is generally a very inefficient process with only a small number of absorbed photons successfully converting into triplet states. In this Letter, we map the relation between stacking geometry and SF yield in crystals based on perylenediimide (PDI) derivatives. This structure-function analysis provides a potential explanation for the SF yield discrepancies observed among similar molecular crystals and may help to identify favorable geometries that lead to an optimal SF yield. Exploring the subtle relationship between stacking geometry and SF yield, this Letter suggests using crystal structure engineering to improve the design of SF-based OPVs.

Original languageEnglish
Pages (from-to)1065-1069
Number of pages5
JournalJournal of Physical Chemistry Letters
Volume4
Issue number7
DOIs
Publication statusPublished - Apr 4 2013

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Keywords

  • excited-state dynamics
  • organic solar cell
  • solar energy
  • triplet formation

ASJC Scopus subject areas

  • Materials Science(all)
  • Physical and Theoretical Chemistry

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