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Enhanced light trapping in solar cells using snow globe coating.

Basch A, Beck F, Söderström T, Varlamov S, Catchpole KR - Prog Photovolt (2012)

Bottom Line: The coating is formed from high refractive index titania particles without containing binder and gives close to 100% reflectance for wavelengths above 400 nm.Snow globe coating is a physicochemical coating method executable in pH neutral media.The mild conditions of this process make this method applicable to many different types of solar cells.

View Article: PubMed Central - PubMed

Affiliation: Centre for Sustainable Energy Systems, The Australian National University Canberra, ACT, 0200, Australia ; Institute of Physics, University of Graz Universitätsplatz 5, 8010, Graz, Austria.

No MeSH data available.


The pH as a function of the zeta-potential. The isoelectric point of titania is found at a pH of 5.3.
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fig02: The pH as a function of the zeta-potential. The isoelectric point of titania is found at a pH of 5.3.

Mentions: To choose a suitable medium in which the particles would form a stable dispersion, we determined the zeta potential of the titania particles, which is a measure of the charge of the particles. The zeta potential was obtained from measurements of the electrophoretic mobility of the charged particles as described in Ref. [9]. Figure 2 shows the results for the zeta potential as a function of pH of the medium. There is a high positive value of the zeta potential for strongly acidic solutions (pH < 3) and a high negative value of the zeta potential for neutral and alkaline solutions. These correspond to high charge on the titania particles and hence stable dispersions. In the pH regions 4–6, the zeta potential is relatively low, corresponding to low charge on the particles. Hence, solutions in this region would be expected to be unstable.


Enhanced light trapping in solar cells using snow globe coating.

Basch A, Beck F, Söderström T, Varlamov S, Catchpole KR - Prog Photovolt (2012)

The pH as a function of the zeta-potential. The isoelectric point of titania is found at a pH of 5.3.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4538979&req=5

fig02: The pH as a function of the zeta-potential. The isoelectric point of titania is found at a pH of 5.3.
Mentions: To choose a suitable medium in which the particles would form a stable dispersion, we determined the zeta potential of the titania particles, which is a measure of the charge of the particles. The zeta potential was obtained from measurements of the electrophoretic mobility of the charged particles as described in Ref. [9]. Figure 2 shows the results for the zeta potential as a function of pH of the medium. There is a high positive value of the zeta potential for strongly acidic solutions (pH < 3) and a high negative value of the zeta potential for neutral and alkaline solutions. These correspond to high charge on the titania particles and hence stable dispersions. In the pH regions 4–6, the zeta potential is relatively low, corresponding to low charge on the particles. Hence, solutions in this region would be expected to be unstable.

Bottom Line: The coating is formed from high refractive index titania particles without containing binder and gives close to 100% reflectance for wavelengths above 400 nm.Snow globe coating is a physicochemical coating method executable in pH neutral media.The mild conditions of this process make this method applicable to many different types of solar cells.

View Article: PubMed Central - PubMed

Affiliation: Centre for Sustainable Energy Systems, The Australian National University Canberra, ACT, 0200, Australia ; Institute of Physics, University of Graz Universitätsplatz 5, 8010, Graz, Austria.

No MeSH data available.