Interfacial structure and dynamics in molecular solar cells

Oliver L.A. Monti, Laura K. Schirra, Michael L. Blumenfeld, Jason M. Tyler, Brandon S. Tackett

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


A novel approach to studying interfacial processes in dye-sensitized solar cells is presented. In order to reduce the complexities of heterogeneity at the heterojunction in such cells, charge transfer is investigated from single fluorescent molecules (alkyl-perylene bisimide) to a highly defined single-crystalline wide-bandgap semiconductor (GaN) using confocal fluorescence microscopy under ultrahigh vacuum conditions. We report detailed studies on the energy level alignment between the perylene bisimide and GaN, characterize the nature of the surfaces involved and demonstrate confocal fluorescence microscopy in an ultrahigh vacuum set-up. The results reported here indicate that the excited state in the chromophore lies at 0 = 100 meV with respect to the bulk conduction band minimum of GaN.

Original languageEnglish (US)
Title of host publicationPhysical Chemistry of Interfaces and Nanomaterials VI
StatePublished - 2007
EventPhysical Chemistry of Interfaces and Nanomaterials VI - San Diego, CA, United States
Duration: Aug 26 2007Aug 28 2007

Publication series

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


OtherPhysical Chemistry of Interfaces and Nanomaterials VI
Country/TerritoryUnited States
CitySan Diego, CA


  • Dye-sensitized solar cells
  • GaN
  • Perylene bisimide
  • Single molecule spectroscopy

ASJC Scopus subject areas

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


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