PbI<sub>2</sub> Reagent Impurities Catalyze Mixed-Cation Halide Perovskite Ink Degradation
Ross A. Kerner, Kelly Schutt, Kai Zhu, Joseph J. Berry
Abstract
Non-negligible K, acetate (OAc–), and nitrate (NO3–) impurities have been identified in commercially available PbI2 reagents, plausibly remnant from synthesis. Here, we characterize the individual impact of each of these impurities on the relative rate of the methylammonium (MA) condensation reaction with formamidinium (FA) to release N-methylformamidinium (MFA), a main degradation pathway of mixed-cation halide perovskite inks, emphasizing the need to better control purity in halide perovskites.
Topics & Concepts
HalideFormamidiniumPerovskite (structure)ImpurityReagentChemistryDegradation (telecommunications)Inorganic chemistryOrganic chemistryComputer scienceTelecommunicationsPerovskite Materials and ApplicationsQuantum Dots Synthesis And Properties