The origin of slow electron recombination processes in dye-sensitized solar cells with alumina barrier coatings
By F. Fabregat‐Santiago, J. García-Cañadas, Emilio Palomares, J. Clifford, S. Haque, J. Durrant, G. Garcia‐Belmonte, Juan Bisquert. 2004
170 citations recorded by the source corpus.
We investigate the effect of a thin alumina coating of nanocrystalline TiO2 films on recombination dynamics of dye-sensitized solar cells. Both coated and uncoated cells were measured by a combination of techniques: transient absorption spectroscopy, electrochemical impedance spectroscopy, and open-circuit voltage decay. It is found that the alumina barrier reduces the recombination of photoinjected electrons to both dye cations and the oxidized redox couple. It is proposed that this observed retardation can be attributed primarily to two effects: almost complete passivation of surface trap states in TiO2 that are able to inject electrons to acceptor species, and slowing down by a factor of 3–4 the rate of interfacial charge transfer from conduction-band states.
Subfields: Materials Chemistry, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/610f925241597bd841ba7165a0f653c1d1743bea
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In Materials Chemistry
In Renewable Energy, Sustainability and the Environment
Citations in the corpus
- Applications of nano-catalyst in new era (2011, background): “Nanoporous electrodes in a core– shell configuration, usually a TiO2 core coated with Al2O3 (Fabregat-Santiago et al., 2004), MgO (Kumara et al., 2004), SiO2 (Palomares et al., 2003), ZrO2 (Chen et al., 2001), or Nb2O5 (Chen et al., 2001), could improve the performance of dye-sensitized solar cells.”
- The renaissance of dye-sensitized solar cells (2012, background): “Pacifying these surface states may therefore have a direct beneficial impact on charge recombinatio”