Change search
ReferencesLink to record
Permanent link

Direct link
Combining a Small Hole-Conductor Molecule for Efficient Dye Regeneration and a Hole-Conducting Polymer in a Solid-State Dye-Sensitized Solar Cell
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry.
Show others and affiliations
2012 (English)In: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 116, no 34, 18070-18078 p.Article in journal (Refereed) Published
Abstract [en]

In dye-sensitized solar cells (DSC) an efficient transfer of dioles from the oxidized dye to the contact is necessary, which in solid-state DSC is performed by hole-conductor molecules. In this report we use photoinduced absorption and transient absorption spectroscopy to show that a small hole-conducting molecule, tris(p-anisyl)amine, regenerates dye molecules in the pores of the dye-sensitized TiO2 nanoparticle electrode efficiently even for thick (>5 mu m) electrodes. For similar thicknesses we observe incomplete regeneration using a larger polymer hole-conductor. However, the performance of the solar cells with the small hole-conductor molecules is poor due to that inefficient hole conduction in these small molecules may limit the collection of the charges at the contacts. Polymer hole-conductors, which may have a good hole conductivity, also have a high molecular weight, which makes these polymers difficult to infiltrate into the smallest pores in the electrode. We show that a conducting polymer, P3HT, may be added to the small molecule hole-conductor, to enable better transport of the charges to the contact and to reduce recombination and therefore increase the photocurrent. This new device construction with a small molecule efficiently regenerating the dye molecules, and a polymer conducting the holes to the contact is therefore a promising pathway for solid-state dye-sensitized solar cells.

Place, publisher, year, edition, pages
2012. Vol. 116, no 34, 18070-18078 p.
National Category
Organic Chemistry
URN: urn:nbn:se:kth:diva-103380DOI: 10.1021/jp3052449ISI: 000308120000010ScopusID: 2-s2.0-84865745135OAI: diva2:560825
Swedish Research Council, 246124

QC 20121016

Available from: 2012-10-16 Created: 2012-10-11 Last updated: 2012-10-16Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Gabrielsson, ErikSun, Licheng
By organisation
Organic Chemistry
In the same journal
The Journal of Physical Chemistry C
Organic Chemistry

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 26 hits
ReferencesLink to record
Permanent link

Direct link