13Multi‐cation Hybrid Perovskite Solar Cells
Jacob N. Vagott and Juan‐Pablo Correa‐Baena
Georgia Institute of Technology, School of Materials Science and Engineering, Atlanta, GA, 30332‐0245, USA
13.1 Introduction
Perovskites are materials with the crystal structure ABX3. Hybrid organic–inorganic perovskites are those where the A‐cation is an organic molecule, the B‐cation is typically a divalent metal, and the X anion is a halide. Organic A‐cations include methylammonium (MA) and formamidinium (FA). Pb and Sn are commonly used for the B‐site cation, and the halogen (X) is usually iodine, bromine, or a combination of the two (known as mixed‐halide).
Single‐cation perovskites such as MAPbI3, FAPbI3, or CsPbI3, while showing some promising ...
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