Abstract
The size and photoluminescence quantum efficiency of FAPbBr3 perovskite nanocrystals could be adjusted by adjusting the viscosity of the solvent and the reaction temperature. If toluene and silicone oil were mixed at a weight ratio of 1:1, FAPbBr3 perovskite nanocrystals can be synthesized at an elevated temperature of 50°C according to the ligand-assisted re-precipitation method. As a result, perovskite nanocrystals with optimal peak wavelength of 535 nm, full width at half maximum of 24.8 nm, and photoluminescence quantum efficiency of 87.5% were achieved. TEM analysis confirmed that the particle was an average size of 10 nm. This synthetic method provides a more convenient route to synthesize perovskite nanoparticles while avoiding aggregation of particles.
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