Journal
NANO LETTERS
Volume 14, Issue 3, Pages 1190-1195Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl4039955
Keywords
Dye-sensitized solar cell; zinc oxide; atomic layer deposition; CH3NH3PbI3; quantum confinement; perovskite
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Funding
- EU [NMP-229036]
- Swiss confederation under Swiss Government Scholarship programme
- Balzan Foundation
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We present a photoanode for dye-sensitized solar cell (DSC) based on ZnO nanoshell deposited by atomic layer deposition at 150 degrees C on a mesoporous insulating template. An ultrathin layer of ZnO between. 3 and 6 nm, which exhibits quantum confinement effect, is found to be sufficient to transport the photogenerated electrons to the external contacts and exhibits near-unity collection efficiency. A 6 nm ZnO nanoshell on a 2.5 mu m mesoporous nanoparticle Al2O3 template yields photovoltaic power conversion efficiency (PCE) of 4.2% in liquid DSC. Perovskite absorber (CH3NH3PbI3) based solid state solar cells made with similar ZnO nanostructures lead to a high PCE of 7%.
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