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Dye-sensitized Solar Cells Employing a SnO2-TiO2 Core-shell Structure Made by Atomic Layer Deposition
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
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2013 (English)In: Chimia (Basel), ISSN 0009-4293, Vol. 67, no 3, p. 142-148Article in journal (Refereed) Published
Abstract [en]

This paper describes the synthesis and characterization of core-shell structures, based on SnO2 and TiO2, for use in dye-sensitized solar cells (DSc). Atomic layer deposition is employed to control and vary the thickness of the TiO2 shell. Increasing the TiO2 shell thickness to 2 nm improved the device performance of liquid electrolyte-based DSC from 0.7% to 3.5%. The increase in efficiency originates from a higher open-circuit potential and a higher short-circuit current, as well as from an improvement in the electron. lifetime. SnO2-TiO2 core-shell DSC devices retain their photovoltage in darkness for longer than 500 seconds, demonstrating that the electrons are contained in the core material. Finally core-shell structures were used for solid-state DSC applications using the hole transporting material 2,2',7,7',-tetrakis(N,N-di-p-methoxyphenyl-amine)-9,9',-spirofluorene. Similar improvements in device performance were obtained for solid-state DSC devices.

Place, publisher, year, edition, pages
2013. Vol. 67, no 3, p. 142-148
Keyword [en]
Core-shell, Dye-sensitized solar cell, Electron lifetime, Photo-capacitor, Spiro-OMeTAD
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:uu:diva-199557DOI: 10.2533/chimia.2013.142ISI: 000317024300006OAI: oai:DiVA.org:uu-199557DiVA, id: diva2:620057
Available from: 2013-05-07 Created: 2013-05-07 Last updated: 2017-12-06Bibliographically approved

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Eriksson, Susanna K.Rensmo, HåkanBoman, MatsBoschloo, GerritHagfeldt, Anders

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