Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 21, Pages 18751-18757Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am504320h
Keywords
photovoltaic; methylammonium lead(ii) triiodide; solution-processed semiconductor; mesoporous TiO2; dichloromethane; emission lifetime
Funding
- Swedish Energy Agency
- Swedish Research Council (VR)
- STandUP for Energy program
- Knut and Alice Wallenberg Foundation
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A two-step wet chemical synthesis method for methylammonium lead(II) triiodide (CH3NH3PbI3) perovskite is further developed for the preparation of highly reproducible solar cells, with the following structure: fluorine-doped tin oxide (FTO)/TiO2 (compact)/TiO2 (mesoporous)/CH3NH3PbI3/spiro-OMeTAD/Ag. The morphology of the perovskite layer could be controlled by careful variation of the processing conditions. Specifically, by modifying the drying process and inclusion of a dichloromethane treatment, more uniform films could be prepared, with longer emission lifetime in the perovskite material and longer electron lifetime in solar cell devices, as well as faster electron transport and enhanced charge collection at the selective contacts. Solar cell efficiencies up to 13.5% were obtained.
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