US 12,630,762 B2 · Hybrid wavelength converter, method for manufacturing same, and light emitting diode comprising same

Abstract

The present inventive concept relates to a hybrid wavelength converter including both a metal halide perovskite nanocrystal particles and non-perovskite-based quantum dots or non-perovskite-based phosphors converting a wavelength of light generated from an excitation light source to specific wavelengths, and a light-emitting device including the same. By including metal halide perovskite nanocrystal particles and non-perovskite quantum dots or non-perovskite phosphors in the dispersion medium, the hybrid wavelength converter according to the present inventive concept enables to make simultaneous wavelength conversion to red and green light, and to be optically stable and improved color purity and luminescence performance without changing the emission wavelength range even with a lower cadmium content than the conventional quantum dot wavelength converter.

Claims17

Dependent claims

A hybrid wavelength converter comprising:

metal halide perovskite nanocrystal particles as a first wavelength converting particle that converts the wavelength of light generated from an excitation light source into a specific wavelength;
non-perovskite-based quantum dots as a second wavelength converting particle that converts a wavelength of light generated from the excitation light source into a specific wavelength;
and
a dispersion medium for dispersing the metal halide perovskite nanocrystal particles and the non-perovskite-based quantum dots,
wherein a mixing ratio of the metal halide perovskite nanocrystal particles and the non-perovskite-based quantum dots is 1:1 to 2:1 by weight.

2 more elements

A light-emitting device comprising:

a base structure;
at least one excitation light source emitting light of a predetermined wavelength disposed on the base structure;
and
a hybrid wavelength converter disposed in the optical path of the excitation light source and converting the wavelength of light generated from the excitation light source to a specific wavelength,
wherein the hybrid wavelength converter comprises metal halide perovskite nanocrystal particles as the first wavelength converting particle converting the wavelength of light generated from the excited light source into a specific wavelength, non-perovskite-based quantum dots as the second wavelength converter converting the wavelength of light generated from the excited light source into a specific wavelength, and a dispersion medium which disperses the metal halide perovskite nanocrystal particles and the non-perovskite-based quantum dots,
wherein the metal halide perovskite nanocrystal particles and the non-perovskite-based quantum dots convert the wavelength of light generated from an excitation light source into different wavelengths, and
wherein a mixing ratio of the metal halide perovskite nanocrystal particles and the non-perovskite-based quantum dots is 1:1 to 2:1 by weight.

4 more elements

Dependencies are inferred from the claim text.

Hybrid wavelength converter, method for manufacturing same, and light emitting diode comprising same

Life of this patent

Hybrid wavelength converter, method for manufacturing same, and light emitting diode comprising same

Life of this patent

Abstract

Claims17