- - A method for manufacturing phase separated PbTe-PbS nanoparticles via a solution process and the phase separated PbTe-PbS nanoparticles manufactured therefrom

摘要

The present invention relates to a method to manufacture phase separated PbTe-PbS nanoparticles using a solution synthesis technique, and phase separated PbTe-PbS nanoparticles manufactured thereof and, more specifically, relates to a method to manufacture phase separated PbTe-PbS nanoparticles using solution synthesis technique, and phase separated PbTe-PbS nanoparticles manufactured thereof comprising: (a) a step of mixing Te and a first solvent, and applying ultrasonic wave to the mixture to acquire a Te-mixed solution; (b) a step of mixing an organic sulfur material and a second solvent, and applying the ultrasonic wave to the mixture to acquire a sulfur-mixed solution; (c) a step of mixing PbO with a third and a fourth solvent, and heating the mixture; (d) a step of adding the sulfur-mixed solution manufactured in step (b) to a result material of step (d) to perform reaction; and (f) a step of cooling a result material of step (d) at room temperature to acquire the phase separated PbTe-PbS nanoparticles. According to the present invention, the nanoparticles including PbTe and PbS in a phase separation state is able to be mass produced at low temperatures in a short time. The present invention is able to usefully be used in photovoltaic and infrared application fields, and a spinodal phase separation effect thermodynamically difficult to be generated found in a synthesis temperature range described in the present invention, thus exhibiting a possibility of controlling a microstructure of nanometer unit; thereby being able to suggest a new technique to control the microstructure.