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- W2969185890 abstract "Abstract Inorganic lead halide perovskites have attracted attention due to their tolerance to higher processing temperature and higher bandgap suitable for tandem solar cell application. Not only do they improve cell stability and efficiency, they also reveal many interesting and un‐anticipated material qualities. This work reports a simple cation exchange growth (CEG) method for fabricating inorganic high‐quality cesium lead iodide (CsPbI 3 ) by adding methylammonium iodide (MAI) additive in the precursor. X‐ray diffraction results reveal a multi‐stage film formation process whereby i) MAPbI 3 perovskite first formed that acts as a perovskite template for ii) subsequent ion exchange whereby the MA + ions in the MAPbI 3 are replaced by Cs + (as temperature ramps up) and iii) form g‐phase perovskite CsPbI 3 . Optical microscopy, photoluminescence, and electrical characterizations reveal that the CEG process produces high‐quality film with better absorption, uniform and dense film with better interface, lower defects, and better stability. Using the CEG approach, the power conversion efficiency of the best CsPbI 3 solar cell is significantly increased up to 14.1% for the device fabricated using 1.0 m MAI additive. The outcome is beneficial for further improvement of inorganic perovskite solar cells and their application in perovskite‐silicon tandem devices." @default.
- W2969185890 created "2019-08-22" @default.
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- W2969185890 date "2019-08-16" @default.
- W2969185890 modified "2023-10-18" @default.
- W2969185890 title "Fabrication of Efficient and Stable CsPbI <sub>3</sub> Perovskite Solar Cells through Cation Exchange Process" @default.
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- W2969185890 doi "https://doi.org/10.1002/aenm.201901685" @default.
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