Photovoltaic conversion enhancement of TiO2 nanoparticles decorated with Au nanocrystals and sensitized with CdSe quantum dots and P3OT polymer

I. Zarazúa; E. De la Rosa; T. López-Luke; J. Reyes; S. Ruiz

doi:10.1117/12.861056

30 August 2010 Photovoltaic conversion enhancement of TiO₂ nanoparticles decorated with Au nanocrystals and sensitized with CdSe quantum dots and P3OT polymer

I. Zarazúa, E. De la Rosa, T. López-Luke, J. Reyes, S. Ruiz

Author Affiliations +

Proceedings Volume 7772, Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion; 777217 (2010) https://doi.org/10.1117/12.861056
Event: SPIE Solar Energy + Technology, 2010, San Diego, California, United States

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.

Citation Download Citation

I. Zarazúa, E. De la Rosa, T. López-Luke, J. Reyes, and S. Ruiz "Photovoltaic conversion enhancement of TiO₂ nanoparticles decorated with Au nanocrystals and sensitized with CdSe quantum dots and P3OT polymer", Proc. SPIE 7772, Next Generation (Nano) Photonic and Cell Technologies for Solar Energy Conversion, 777217 (30 August 2010); https://doi.org/10.1117/12.861056

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