Fluorine Treatment of TiO2 for Enhancing Quantum Dot Sensitized Solar Cell Performance
Impact
![Google Scholar](/xmlui/themes/Mirage2/images/uji/logo_google.png)
![Microsoft Academico](/xmlui/themes/Mirage2/images/uji/logo_microsoft.png)
Metadata
Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7013
comunitat-uji-handle3:10234/8638
comunitat-uji-handle4:
INVESTIGACIONThis resource is restricted
http://dx.doi.org/10.1021/jp202819y |
Metadata
Title
Fluorine Treatment of TiO2 for Enhancing Quantum Dot Sensitized Solar Cell PerformanceAuthor (s)
Date
2011-06Publisher
ACSISSN
1932-7447Type
info:eu-repo/semantics/articlePublisher version
http://pubs.acs.org/doi/full/10.1021/jp202819yVersion
info:eu-repo/semantics/publishedVersionAbstract
Surface treatments of TiO2 nanostructure in semiconductor quantum dot sensitized solar cells (QDSCs) aimed to increase the photovoltaic conversion efficiencies of the solar cells are analyzed. A fluorine treatment, ... [+]
Surface treatments of TiO2 nanostructure in semiconductor quantum dot sensitized solar cells (QDSCs) aimed to increase the photovoltaic conversion efficiencies of the solar cells are analyzed. A fluorine treatment, with NH4F or HF, on the TiO2 electrodes leads to a general increase of QDSCs performance in a range of QDSCs using different light absorbing materials: CdS, CdSe, and PbS/CdS. In contrast, no significant effect on QDSC performance has been observed after a TiCl4 treatment conventionally used for high performance dye sensitized solar cells (DSCs). Surface and photoelectrochemical characterization of treated electrodes and full solar cells was carried out by means of X-ray photoelectron spectroscopy (XPS), impedance spectroscopy (IS), and applied bias voltage decay (ABVD), to understand the origin of the beneficial effect of fluorine. It was found that the origin of the enhancement is different depending on the semiconductor material (CdS, CdSe, and PbS/CdS). For CdS and CdSe, the recombination of photoinjected carrier is reduced after F treatment. On the other hand, for PbS/CdS, the treatment accelerates the deposition kinetics of PbS by successive ionic layer adsorption and reaction (SILAR), increasing the amount of deposited material and consequently the light harvesting. Our study indicates, in general, that treatments different from those conventionally used in DSCs are required and, specifically, that F treatment can be systematically used in QDSCs to increase the solar cell performance. [-]
Is part of
Journal of Physical Chemistry C, 2011, 115 (29)Rights
Copyright © 2011 American Chemical Society
http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/restrictedAccess
http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/restrictedAccess
This item appears in the folowing collection(s)
- QFA_Articles [825]