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Efficient and stable CH3NH3PbI3-sensitized ZnO nanorod array solid-state solar cells
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, Physical Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Physical Chemistry.
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2013 (English)In: Nanoscale, ISSN 2040-3364, E-ISSN 2040-3372, Vol. 5, no 23, p. 11686-11691Article in journal (Refereed) Published
Abstract [en]

We report for the first time the use of a perovskite (CH3NH3PbI3) absorber in combination with ZnO nanorod arrays (NRAs) for solar cell applications. The perovskite material has a higher absorption coefficient than molecular dye sensitizers, gives better solar cell stability, and is therefore more suited as a sensitizer for ZnO NRAs. A solar cell efficiency of 5.0% was achieved under 1000 W m(-2) AM 1.5 G illumination for a solar cell with the structure: ZnO NRA/CH3NH3PbI3/spiro-MeOTAD/Ag. Moreover, the solar cell shows a good long-term stability. Using transient photocurrent and photovoltage measurements it was found that the electron transport time and lifetime vary with the ZnO nanorod length, a trend which is similar to that in dye-sensitized solar cells, DSCs, suggesting a similar charge transfer process in ZnO NRA/CH3NH3PbI3 solar cells as in conventional DSCs. Compared to CH3NH3PbI3/TiO2 solar cells, ZnO shows a lower performance due to more recombination losses.

Place, publisher, year, edition, pages
2013. Vol. 5, no 23, p. 11686-11691
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Natural Sciences
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URN: urn:nbn:se:uu:diva-213101DOI: 10.1039/c3nr01542dISI: 000326982000042OAI: oai:DiVA.org:uu-213101DiVA, id: diva2:681190
Available from: 2013-12-19 Created: 2013-12-18 Last updated: 2017-12-06Bibliographically approved

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Bi, DongqinBoschloo, GerritYang, LeiJohansson, Erik M. J.Hagfeldt, Anders

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