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US 9,728,687 B2Granted
Quantum platelet converter
AssigneeSeoul Semiconductor Co., Ltd.
InventorsNathan Stott, Won Cheol Seo, Ji Hye An
Life of this patent
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Abstract
In one aspect a light emitting device includes a light emitting diode (LED) chip, and an encapsulant covering the LED chip. The encapsulant is embedded with a downconverter. The downconverter includes a quasi-two dimensional quantum nanoplatelet structure.
Claims17
A light emitting device, comprising:
- a light emitting diode (LED) chip that emits light of a first wavelength;
- an encapsulant disposed over the LED chip;
- and
- one or more downconverters embedded in the encapsulant,
- wherein each downconverter includes a quasi-two dimensional quantum nanoplatelet structure that interacts with the emitted light of the first wavelength from the LED chip to produce light of a second wavelength that is longer than the first wavelength,
- wherein the quasi-two dimensional quantum nanoplatelet structure of the downconverter includes a core material covered by at least one nanoplatelet shell, and
- wherein the at least one nanoplatelet shell has a length and a width larger than a height,
- wherein the downconverter includes an on-chip downconverter that is formed as a part of the LED chip.
5 more elements
A light emitting device, comprising:
- a light emitting diode (LED) chip including a substrate, and a light emitting structure disposed over a surface of the substrate and operable to emit light of a first optical wavelength;
- an encapsulant disposed over the LED chip;
- and
- a downconverter embedded in the encapsulant and including an on-chip downconverter that is formed as a part of the LED chip,
- wherein the downconverter includes a quasi-two dimensional quantum nanoplatelet structure that converts light of the first optical wavelength from the LED chip into light of a second optical wavelength longer than the first optical wavelength,
- wherein the quasi-two dimensional quantum nanoplatelet structure of the downconverter includes a core material covered by at least one nanoplatelet shell, and
- wherein the at least one nanoplatelet shell has a length and a width larger than a height.
4 more elements
A light emitting device, comprising:
- a substrate;
- a light emitting structure disposed over a surface of the substrate;
- and
- a wavelength converting layer disposed over the light emitting structure, wherein the wavelength converting layer includes a quasi-two dimensional quantum nanoplatelet structure,
- wherein the quasi-two dimensional quantum nanoplatelet structure of the downconverter includes a core material covered by at least one nanoplatelet shell, and
- wherein the at least one nanoplatelet shell has a length and a width larger than a height, wherein the light emitting device comprises a transparent layer disposed between the wavelength converting layer and the light emitting structure.
3 more elements
Dependencies are inferred from the claim text.