Incorporation of nanocrystals with different dimensionalities in hybrid TiO2/P3HT solar cells

Flavio Santos Freitas; Juliana Martins de Souza e Silva; Mateus Borba Cardoso; Ana Flavia Nogueira

doi:10.1117/1.JPE.5.057407

25 February 2015 Incorporation of nanocrystals with different dimensionalities in hybrid TiO2/P3HT solar cells

Flavio Santos Freitas, Juliana Martins de Souza e Silva, Mateus Borba Cardoso, Ana Flavia Nogueira

Author Affiliations +

Journal of Photonics for Energy, Vol. 5, Issue 1, 057407 (February 2015). https://doi.org/10.1117/1.JPE.5.057407

Abstract

We investigate the effect of TiO₂ nanoparticles–nanospheres and nanorods–inserted in the poly(3-hexylthiophene) (P3HT) matrix of TiO₂/P3HT inverted hybrid solar cells. X-ray diffraction, high-resolution transmission electron microscopy, small-angle x-ray scattering, photoluminescence, and photoelectrochemical experiments were employed to investigate the structure, morphology, and photoactivity of TiO₂ nanoparticles modified with 2-thiopheneacetic acid, mixed or not with P3HT. Both TiO₂ nanospheres and TiO₂ nanorods presented a good dispersion in the polymer matrix. The incorporation of TiO₂ nanospheres and nanorods has improved the photocurrent generation, and devices with efficiency values up to 1.35% were obtained. Our results reveal that the nanoscale morphology enables an enhanced interfacial area for exciton dissociation. In particular, the nanospheres contribute with their high specific area, and the nanorods contribute with their high aspect ratio.

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Flavio Santos Freitas, Juliana Martins de Souza e Silva, Mateus Borba Cardoso, and Ana Flavia Nogueira "Incorporation of nanocrystals with different dimensionalities in hybrid TiO2/P3HT solar cells," Journal of Photonics for Energy 5(1), 057407 (25 February 2015). https://doi.org/10.1117/1.JPE.5.057407

Published: 25 February 2015

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