Method for preparing perovskite nanoparticle using fluidic channel

A method for preparing a perovskite nanoparticle using a fluidic channel including a first outer tube with both sides open, a second outer tube disposed on one side of the first outer tube, and a storage tube disposed on the other side of the first outer tube, the method comprising:

• a first step of forming the fluidic channel including the first outer tube, the second outer tube, and the storage tube capable of introducing flows of fluids;
• a second step of inducing formation of the perovskite nanoparticles by continuously preparing a mixed fluid with a laminar flow based on a flow rate by introducing a flow of a base fluid into the first outer tube, and introducing a flow of a dispersion fluid in the same direction as the flow of the base fluid into the second outer tube;
• and
• a third step of storing the mixed fluid in the storage tube, stirring the mixed fluid stored in the storage tube, and separating the perovskite nanoparticles from the mixed fluid stored in the storage tube,
• wherein the dispersion fluid contains a perovskite precursor, an organic ligand, and a polar aprotic solvent,
• wherein the base fluid contains a liquid crystal, and
• wherein the second step includes limiting a particle growth of the perovskite nanoparticle by an elastic force of the liquid crystal contained in the base fluid occurring when the perovskite nanoparticle becomes larger than a characteristic region defined by an elastic constant and a surface anchoring coefficient of the base fluid containing the liquid crystal contained in the mixed fluid.