Visualizing charge transfer and structural change at dye-nanoparticle interface

Xiaoyi Zhang*, Jianchang Guo, Jenny V. Lockard, Klaus Attenkofer, Guy Jennings, Lin X Chen

*Corresponding author for this work

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


Dye molecules (or sensitizers) adsorbed onto highly porous nanocrystalline electrode are the key elements in a dye sensitized solar cell (DSSC). Determining electron/energy transfers coupled with structural changes at dye-nanoparticle interface is essential in understanding the fundamental mechanism, and therefore, realizing the rational designs of solar cells. Laser-initiated time-resolved X-ray absorption spectroscopy (LITR-XAS) has been used to probe the electron/charge transfer and structural changes at dye-nanoparticle interface. The photoexcited RuN3 molecules inject electrons to TiO2 semiconductors and form RuN3 cations, which have been visualized by LITR-XANES and XAFS spectra measured at Ruthenium K-edge at different delay times relative to the laser excitation. The time evolution of the Ru oxidation state and intranuclear distance in RuN3 complex has been detected. These measurements demonstrate a significant potential o f using LITR-XAS to study the interfacial phenomena at surface of nanomaterials in solar fuel generation.

Original languageEnglish (US)
Title of host publicationAmerican Chemical Society - 238th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
StatePublished - Dec 1 2009
Event238th National Meeting and Exposition of the American Chemical Society, ACS 2009 - Washington, DC, United States
Duration: Aug 16 2009Aug 20 2009


Other238th National Meeting and Exposition of the American Chemical Society, ACS 2009
Country/TerritoryUnited States
CityWashington, DC

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)


Dive into the research topics of 'Visualizing charge transfer and structural change at dye-nanoparticle interface'. Together they form a unique fingerprint.

Cite this