Sensitization of silicon by singlet exciton fission in tetracene

Tony C. Wu, Markus Einzinger, Julia Kompalla, Hannah Smith, Collin Perkinson, Leas Nienhaus, Sarah Wieghold, Daniel Congreve, Nicholas Thompson, Antoine Kahn, Moungi Bawendi, Marc A. Baldo

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Singlet fission can split a high energy singlet exciton and generate two lower energy triplet excitons. This process has shown near 200 percent triplet exciton yield. Sensitizing solar cells with singlet fission material, it can potentially increase the power conversion efficiency limit from 29 percent to 35 percent. Singlet fission in the tetracene is known to be efficient, and the energy of the triplet excitons are energetically matched to the silicon bandgap. In this work, we designed an optical measurement with an external magnetic field to determine the efficiencies of triplet exciton transfer from tetracene to silicon. Using this method, we have found that a passivation layer of 8 angstroms of hafnium oxynitride on silicon allows efficient triplet exciton transfer around 133 percent.

Original languageEnglish (US)
Title of host publicationPhysical Chemistry of Semiconductor Materials and Interfaces XIX
EditorsChristian Nielsen, Daniel Congreve, Andrew J. Musser
ISBN (Electronic)9781510637344
StatePublished - 2020
EventPhysical Chemistry of Semiconductor Materials and Interfaces XIX 2020 - Virtual, Online, United States
Duration: Aug 24 2020Sep 4 2020

Publication series

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


ConferencePhysical Chemistry of Semiconductor Materials and Interfaces XIX 2020
Country/TerritoryUnited States
CityVirtual, Online

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


  • Hybrid Silicon Solar Cell
  • Singlet Fission


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