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Effect of the Chromophores Structures on the Performance of Solid-State Dye Sensitized Solar Cells
KTH, Royal Institue of Technology.
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2014 (English)In: Nano, ISSN 1793-2920, Vol. 9, no 5, 1440005- p.Article in journal (Refereed) Published
Abstract [en]

The er effect of metal-free chromophores on dye-sensitized solar cell performance is investigated. Solid state dye-sensitized solar cells (ssDSCs) using dirfferent molecular sensitizers based on tri-phenylamine (TPA) with thiophene linkers and different alkyl chain in the donor unit have been characterized using impedance spectroscopy (IS). We show that different molecular structures play a fundamental role on solar cell performance, by the effect produced on TiO2 conduction band position and in the recombination rate. Dye structure and its electronic properties are the main factors that control the recombination, the capacitance and the efficiency of the cells. A clear trend between the performance of the cell and the optimization level of the blocking effect of the dye structure has been identified in the solid state solar cells with Spiro-OMeTAD hole conductor.

Place, publisher, year, edition, pages
2014. Vol. 9, no 5, 1440005- p.
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Physical Chemistry Materials Engineering
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URN: urn:nbn:se:uu:diva-228186DOI: 10.1142/S1793292014400050ISI: 000339000700005OAI: oai:DiVA.org:uu-228186DiVA: diva2:732909
Available from: 2014-07-07 Created: 2014-07-07 Last updated: 2014-08-12Bibliographically approved

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Tian, HainingHagfeldt, Anders

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