Hybrid Dye-Titania Nanoparticles for Superior Low-Temperature Dye-Sensitized Solar Cells

  1. Kunzmann, A. 2
  2. Valero, S. 4
  3. Sepúlveda, A.E. 1
  4. Rico-Santacruz, M. 4
  5. Lalinde, E. 1
  6. Berenguer, J.R. 1
  7. García-Martínez, J. 4
  8. Guldi, D.M. 2
  9. Serrano, E. 4
  10. Costa, R.D. 23
  1. 1 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

  2. 2 University of Erlangen-Nuremberg
    info

    University of Erlangen-Nuremberg

    Erlangen, Alemania

    ROR https://ror.org/00f7hpc57

  3. 3 Instituto IMDEA Materiales
    info

    Instituto IMDEA Materiales

    Getafe, España

    ROR https://ror.org/009s53a61

  4. 4 Universitat d'Alacant
    info

    Universitat d'Alacant

    Alicante, España

    ROR https://ror.org/05t8bcz72

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Revista:
Advanced Energy Materials

ISSN: 1614-6832

Año de publicación: 2018

Tipo: Artículo

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DOI: 10.1002/AENM.201702583 SCOPUS: 2-s2.0-85040764100 GOOGLE SCHOLAR

Otras publicaciones en: Advanced Energy Materials

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Resumen

In this work, a new strategy to design low-temperature (≤200 °C) sintered dye-sensitized solar cells (lt-DSSC) is reported to enhance charge collection efficiencies (ηcoll), photoconversion efficiencies (η), and stabilities under continuous operation conditions. Realization of lt-DSSC is enabled by the integration of hybrid nanoparticles based on TiO2-Ru(II) complex (TiO2_Ru_IS)-obtained by in situ bottom-up construction of Ru(II) N3 dye-sensitized titania-into the photoelectrode. Incentives for the use of TiO2_Ru_IS are i) dye stability due to its integration into the TiO2 anatase network and ii) enhanced charge collection yield due to its significant resistance toward electron recombination with electrolytes. It is demonstrated that devices with single-layer photoelectrodes featuring blends of P25 and TiO2_Ru_IS give rise to a 60% ηcoll relative to a 46% ηcoll for devices with P25-based photoelectrodes. Responsible for this trend is a better charge transport and a reduced electron recombination. When using a multilayered photoelectrode architecture with a top layer based only on TiO2_Ru_IS, devices with an even higher ηcoll (74%) featuring a η of around 8.75% and stabilities of 600 h are achieved. This represents the highest values reported for lt-DSSC to date. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.