Interfacial structure and dynamics in molecular solar cells

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

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

Abstract

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 publicationProceedings of SPIE - The International Society for Optical Engineering
Volume6643
DOIs
Publication statusPublished - 2007
EventPhysical Chemistry of Interfaces and Nanomaterials VI - San Diego, CA, United States
Duration: Aug 26 2007Aug 28 2007

Other

OtherPhysical Chemistry of Interfaces and Nanomaterials VI
CountryUnited States
CitySan Diego, CA
Period8/26/078/28/07

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Keywords

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

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Monti Masel, O. L. A., Schirra, L. K., Blumenfeld, M. L., Tyler, J. M., & Tackett, B. S. (2007). Interfacial structure and dynamics in molecular solar cells. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 6643). [66430C] https://doi.org/10.1117/12.731773