RED-EMITTING QUANTUM DOTS HAVING NARROW FULL WIDTH AT HALF MAXIMUM AND EMISSION WAVELENGTH FOR APPLICATION TO HIGH-COLOR-PURITY DISPLAY, AND PREPARATION METHOD THEREFOR

Abstract

One embodiment of the present invention relates to a method for preparing InP-based nanoparticles for application to a high-color-purity display, and provides: a technique for synthesizing uniform core quantum dots by providing a method for preparing quantum dots, the method comprising the steps of preparing a mixture comprising InX-based quantum dot seeds, forming an InX-based core by continuously injecting a Zn(In)X-based cluster into the mixture, forming a first shell coated on the In-based core by adding a selenium compound and a zinc precursor to the mixture, and forming a second shell coated on the first shell by adding a sulfur compound and the zinc precursor to the mixture, wherein the first shell is formed from ZnSe, the second shell is formed from ZnS, and X includes phosphorus (P), arsenic (As) or antimony (Sb); and a light emitting layer of a next generation self light-emitting device, the light emitting layer having a color purity improved over that of conventional quantum dots and resolving the stability problem thereof.