Articles producció científica> Enginyeria Electrònica, Elèctrica i Automàtica

Two-dimensional finite-element modeling of periodical interdigitated full organic solar cells

  • Identification data

    Identifier: PC:374
    Handle: https://hdl.handle.net/20.500.11797/PC374
    Authors:
    Granero, P.Balderrama, V.S.Ferré-Borrull, J.Pallarès, J.Marsal, L.F.
    Abstract:
    10.1063/1.4788819

  • Others:

    Author, as appears in the article.: Granero, P. Balderrama, V.S. Ferré-Borrull, J. Pallarès, J. Marsal, L.F.
    Department: Enginyeria Electrònica, Elèctrica i Automàtica
    e-ISSN: 1089-7550
    Abstract: By means of ?nite-element numerical modeling, we analyze the in?uence of the nanostructured dissociation interface geometry on the behavior of interdigitated heterojunction full organic solar cells. A systematic analysis of light absorption, exciton diffusion, and carrier transport, all in the same numerical framework, is carried out to obtain their dependence on the interface geometrical parameters: pillar diameter and height, and nanostructure period. Cells are constituted of poly(3-hexylthiophene) (P3HT) and 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C61. Results show that light absorption is maximum for pillar heights of 80 nm and 230 nm. However, due to the short exciton diffusion length of organic materials, the analysis of the exciton diffusion process reveals that the 80 nm thickness gives rise to a higher photocurrent, except for the smaller pillar diameters. In terms of ef?ciency, it has been observed that the charge carrier transport is weakly dependent on the geometric parameters of the nanostructured interface if compared with the exciton diffusion process. The optimal cell is a device with a pillar height of 80 nm, a structure period of 25 nm, and a ratio of the nanopillar diameter to the period of 0.75, with an ef?ciency 3.6 times higher than the best planar bilayer reference device. This structure is such that it reaches a compromise between having a high proportion of P3HT to increase light absorption but preserving a small pillar diameter and interpillar distance to ensure an extended exciton dissociation interface.
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    Keyword in other language: Excitons Finite element analysis Light absorption organic compounds Photoconductivity
    ISSN: 0021-8979
    Last page: 7
    Journal volume: 113
    Papper version: info:eu-repo/semantics/publishedVersion
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Entity: Universitat Rovira i Virgili.
    Journal publication year: 2013
    First page: 1