Journal article

Does the triphenylamine-based D35 dye sensitizer form aggregates on metal-oxide surfaces?

Viktoras Dryza, Evan J Bieske

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | ELSEVIER SCIENCE SA | Published : 2015

Abstract

The absorption and emission properties of the D35 organic dye sensitizer attached to zirconia and titania nanoparticles are examined. The dye-sensitized nanoparticles are prepared in the presence and absence of the chenodeoxycholic acid (CDCA) co-adsorbent to control the amount of dye adsorbed to the metal-oxide surface. The broadening of the dye's optical absorption band on the long wavelength side for layers without CDCA co-adsorbent demonstrates that J-aggregates are formed. Fast energy transfer is found to occur from the excited dye monomers to the dye aggregates. From the time-resolved fluorescence decay curves recorded for the dye attached to zirconia, the isolated dye monomer is deter..

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University of Melbourne Researchers

Grants

Awarded by Australian Research Council's Discovery Project funding scheme


Awarded by Australian Renewable Energy Agency Postdoctoral Fellowship


Funding Acknowledgements

This research was supported under the Australian Research Council's Discovery Project funding scheme (Project Number DPI 20100100). V. Dryza acknowledges an Australian Renewable Energy Agency Postdoctoral Fellowship (6-F004) and support from the University of Melbourne's Early Career Researcher Grant Scheme. The picosecond laser was kindly provided by K.P. Ghiggino and T.A. Smith.