The unifying theme in this diverse group of research
projects is
the study of intra- and intermolecular energy and
electron transfer.
We are actively pursuing a number of interesting
kinetic and
thermodynamic problems as they apply to
dye-sensitized solar cells
(DSSC's or Gratzel cells). In the context of
DSSC's, we are
interested in the energetics and dynamics of
polypyridyl dye monolayers on
semiconducting (TiO2 and SnO2) nanoparticles as well
as self-assembled
multilayers of porphyrinic dye molecules on
semiconducting surfaces.
In both cases, the transfer of electrons at the
interface of the
organometallic dyes and the inorganic semiconductor
and the
intermolecular transfer of excitation energy
(excitons) are our
fundamental concerns. We strive to synthesize
original
organometallic molecules to study their
fundamental photophysical properties in a variety of
chemical
environments. The members of this subgroup are
well-versed in
electrochemistry, transient absorbance and
fluorescence, steady-state
absorbance and fluorescence, photothermal
spectroscopies (time-resolve
photoacoustic (TRPAS) and photothermal beam
deflection spectroscopy
(TRPBD)), Stark-effect spectroscopy, and transient DC photoconductivity
(TDCP) spectroscopy, in addition to organometallic
synthetic methods and
thin film preparation.
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Fundamental
Photophysics and Dynamics of Mixed-Valency Systems
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We
presently have several projects aimed at understanding mixed valence systems.
Some of the techniques used include stark
spectroscopy, ultrafast spectroscopies, Raman scattering, and (coming
soon) transient DC conductivity.
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for more info. |
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