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Proceedings Paper

Photovoltaic conversion enhancement of TiO2 nanoparticles decorated with Au nanocrystals and sensitized with CdSe quantum dots and P3OT polymer
Author(s): I. Zarazúa; E. De la Rosa; T. López-Luke; J. Reyes; S. Ruiz
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Paper Abstract

In this work, the preparation and photovoltaic conversion characterization of 10 μm films of sensitized TiO2 is reported. The 13 nm TiO2 nanocrystals with anatase crystalline phase were deposited on an FTO substrate and decorated with Au nanocrystals and sensitized with CdSe Quantum dots (QD) and poly(3-octylthiophene) (P3OT) in different configurations. The photocurrent was measured in a three electrode electrochemical cell. The results exhibited that TiO2/Au/QD/P3OT films have the largest photocurrent, giving approximately fivefold the photocurrent of TiO2 films sensitized only with QD and near sevenfold the photocurrent of Au decorated TiO2 films. These results are attributed to the ability of the Au nanocrystals to extract electrons from QD and the photogeneration and hole transport of P3OT. Both phenomena combined with the QD's photogeneration give a great amount of electrons that increase the photocurrent generation.

Paper Details

Date Published: 30 August 2010
PDF: 9 pages
Proc. SPIE 7772, Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion, 777217 (30 August 2010); doi: 10.1117/12.861056
Show Author Affiliations
I. Zarazúa, Ctr. de Investigaciones en Óptica, A.P. (Mexico)
E. De la Rosa, Ctr. de Investigaciones en Óptica, A.P. (Mexico)
T. López-Luke, Ctr. de Investigaciones en Óptica, A.P. (Mexico)
J. Reyes, Univ. de Colima (Mexico)
S. Ruiz, Ctr. de Investigaciones en Óptica, A.P. (Mexico)


Published in SPIE Proceedings Vol. 7772:
Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion
Loucas Tsakalakos, Editor(s)

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