Efficient and stable CH3NH3PbI3-sensitized ZnO nanorod array solid-state solar cells

We report for the first time the use of a perovskite (CH 3 NH 3 PbI 3 ) 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...

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Bibliographic Details
Published in:Nanoscale 2013-12, Vol.5 (23), p.11686-11691
Main Authors: Bi, Dongqin, Boschloo, Gerrit, Schwarzmüller, Stefan, Yang, Lei, Johansson, Erik M. J, Hagfeldt, Anders
Format: Article
Language:English
Subjects:
Coloring Agents - chemistry
Electron Transport
Iodides - chemistry
Lead - chemistry
Light
Methylamines - chemistry
Nanotubes - chemistry
Solar Energy
Zinc Oxide - chemistry
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Summary:We report for the first time the use of a perovskite (CH 3 NH 3 PbI 3 ) 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/CH 3 NH 3 PbI 3 /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/CH 3 NH 3 PbI 3 solar cells as in conventional DSCs. Compared to CH 3 NH 3 PbI 3 /TiO 2 solar cells, ZnO shows a lower performance due to more recombination losses. Efficient photovoltaic devices based on ZnO nanorod arrays in combination with CH 3 NH 3 PbI 3 .
ISSN:2040-3364
2040-3372
2040-3372
DOI:10.1039/c3nr01542d