25 February 2015 Incorporation of nanocrystals with different dimensionalities in hybrid TiO2/P3HT solar cells
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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.
© 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
Flavio Santos Freitas, Juliana Martins de Souza e Silva, Mateus Borba Cardoso, 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 . Submission:
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