The DOI matches its Crossref record; 28 of the 28 references it cites were found in a registry or an index.
CdSe Quantum Dot-Sensitized TiO2 Electrodes: Effect of Quantum Dot Coverage and Mode of Attachment
Abstract
We have investigated the sensitization of nanoporous titanium dioxide by previously synthesized CdSe quantum dots (QDs) protected with trioctylphosphine. Covering the nanoporous TiO 2 films with QDs has been achieved using two strategies: (i) direct adsorption from dichoromethane dispersions and (ii) anchoring the QDs through a molecular linker, concretely, mercaptopropionic acid (MPA). In contrast with MPA-mediated adsorption, direct adsorption leads to a high degree of QD aggregation, as revealed by atomic force microscopy (AFM) images obtained with both TiO 2 nanoporous films and monocrystalline surfaces. Importantly, at saturation, only 14% of the real surface area of a 5-μm thick P25 TiO 2 layer is covered for both attachment modes. For MPA attachment, the incident photon-to-current efficiency (IPCE) increases with the loading, whereas a maximum (close to 40% at the QD excitonic peak) is defined for intermediate coverages in the case of QD direct adsorption. In addition, for equivalent QD loading, IPCE values are larger in the case of direct adsorption.
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Metadata
- Authors
- Guijarro, N., Lana-Villarreal, T., Mora-Seró, I., Bisquert, J., & Gómez, R.
- Venue
- The Journal of Physical Chemistry C
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-02-16
- Volume
- 113
- Issue
- 10
- Pages
- 4208-4214
- ISSN
- 1932-7447 (ISSN-L)
- 1932-7455
- OpenAlex
- W2062670924
- Cited by
- 342
- References
- 28
- FWCI
- 18.08
- Type
- journal article
- Language
- en
- Open access
- closed
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