# US 10,121,983 B2 · Light-emitting device including nano particle having core shell structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,121,983 B2 - Document ID: US10121983B2 - Status: Granted - Kind: B2 - Application number: 15/420,877 - Filed: 2017-01-31 - Published: 2017-09-21 - Granted: 2018-11-06 - Earliest claimed: 2016-03-17 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Junhee Choi; Taeho Shin - Web page: https://patentgrep.com/patent/US10121983B2 ## CPC - C09K 11/02: Use of particular materials as binders, particle coatings or suspension media therefor - H10K 50/11: characterised by the electroluminescent [EL] layers - H10K 50/115: comprising active inorganic nanostructures, e.g. luminescent quantum dots - H10K 50/13: comprising stacked EL layers within one EL unit - H10K 50/15: Hole transporting layers - H10K 50/16: Electron transporting layers - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract A light-emitting device is provided. The light-emitting device includes a first electrode structure, a light-emitting layer disposed on the first electrode structure, a second electrode structure disposed on the light-emitting layer, and a plurality of nano-particles disposed within the light-emitting layer. Each of the nano-particles includes a metal core and a dielectric shell that surrounds the metal core to generate plasmon resonance. ## Claims ### Claim 1 A light-emitting device comprising: a first electrode structure; a light-emitting layer disposed on the first electrode structure; a second electrode structure disposed on the light-emitting layer; and a plurality of nano-particles disposed within the light-emitting layer, wherein each of the plurality of nano-particles comprises a metal core and a dielectric shell surrounding the metal core, and wherein the nano-particles are arranged such that none of the plurality of nano-particles contacts an interface between the light-emitting layer and the first electrode structure and none of the plurality of nano-particles contacts an interface between the light-emitting layer and the second electrode structure. ### Claim 2 (depends on 1) The light-emitting device of claim 1, wherein the light-emitting layer comprises one of an organic light-emitting material and quantum dots. ### Claim 3 (depends on 1) The light-emitting device of claim 1, wherein the nano-particles arranged in a regular, repeating pattern within the light-emitting layer. ### Claim 4 (depends on 1) The light-emitting device of claim 1, wherein the nano-particles are irregularly arranged within the light-emitting layer. ### Claim 5 (depends on 1) The light-emitting device of claim 1, wherein a volume ratio between a total volume of the plurality of nano-particles and a volume of the light-emitting layer is in a range from about 1:1 to about 1:100,000. ### Claim 6 (depends on 1) The light-emitting device of claim 1, wherein the metal core of each of the plurality of nano-particles comprises at least one of Ag, Au, and Al, and wherein the dielectric shell of each of the plurality of nano-particles comprises at least one of Si3N4, SiO2, Al2O3, and HfO2. ### Claim 7 (depends on 1) The light-emitting device of claim 1, wherein a diameter of the metal core of each of the plurality of nano-particles is in a range from about 5 nm to about 200 nm, and a thickness of the dielectric shell of each of the plurality of nano-particles is in a range from about 1 nm to about 100 nm. ### Claim 8 (depends on 1) The light-emitting device of claim 1, wherein the light-emitting layer comprises: a first light-emitting layer that contacts the first electrode structure; a third light-emitting layer that contacts the second electrode structure; and a second light-emitting layer disposed between the first light-emitting layer and the third light-emitting layer, wherein the plurality of nano-particles are arranged in the second light-emitting layer, and no nanoparticles are present in the first light emitting layer or in the third light emitting layer. ### Claim 9 (depends on 8) The light-emitting device of claim 8, wherein a thickness of the first light-emitting layer is smaller than a thickness of the second light-emitting layer, and a thickness of the third light-emitting layer is smaller than the thickness of the second light-emitting layer. ### Claim 10 (depends on 1) The light-emitting device of claim 1, wherein the light-emitting layer comprises: a first color light-emitting layer that emits light in a first wavelength band; and a second color light-emitting layer that is disposed on the first color light-emitting layer and emits light in a second wavelength band different from the first wavelength band, wherein the plurality of nano-particles comprises a plurality of first nano-particles that generate plasmon resonance in the first wavelength band and a plurality of second nano-particles that generate plasmon resonance in the second wavelength band. ### Claim 11 (depends on 10) The light-emitting device of claim 10, wherein the plurality of first nano-particles are disposed in the first light-emitting layer and the plurality of second nano-particles are disposed in the second light-emitting layer. ### Claim 12 (depends on 10) The light-emitting device of claim 10, wherein the plurality of first nano-particles and the plurality of second nano-particles are disposed at an interface between the first color light-emitting layer and the second color light-emitting layer. ### Claim 13 (depends on 12) The light-emitting device of claim 12, wherein the first nano-particles and the second nano-particles are alternately arranged. ### Claim 14 (depends on 10) The light-emitting device of claim 10, wherein the light-emitting layer further comprises a third color light-emitting layer that emits light in a third wavelength band that is different from the first wavelength band and the second wavelength band, wherein the third color light-emitting layer is disposed on the second color light-emitting layer, and wherein the plurality of nano-particles further comprises a plurality of third nano-particles that generate plasmon resonance in the third wavelength band. ### Claim 15 (depends on 14) The light-emitting device of claim 14, wherein the plurality of first nano-particles and a first portion of the plurality of second nano-particles are disposed at an interface between the first color light-emitting layer and the second color light-emitting layer, and wherein a second portion of the plurality of second nano-particles and the plurality of third nano-particles are disposed at an interface between the second color light-emitting layer and the third color light-emitting layer. ### Claim 16 (depends on 1) The light-emitting device of claim 1, wherein the plurality of nano-particles comprises: a plurality of first nano-particles that generate plasmon resonance in a first wavelength band, a plurality of second nano-particles that generate plasmon resonance in a second wavelength band different from the first wavelength band, and a plurality of third nano-particles that generate a plasmon resonance in a third wavelength band different from the first wavelength band and the second wavelength band, and wherein the plurality of first nano-particles, the plurality of second nano-particles, and the plurality of third nano-particles are mixed and are irregularly arranged within the light-emitting layer. ### Claim 17 (depends on 16) The light-emitting device of claim 16, wherein the light-emitting layer comprises: a first light-emitting material that emits light in the first wavelength band; a second light-emitting material that emits light in the second wavelength band; and a third light-emitting material that emits light in the third wavelength band, wherein the first light-emitting material, the second light-emitting material, and the third light-emitting material are mixed within the light-emitting layer. ### Claim 18 (depends on 1) The light-emitting device of claim 1, wherein the first electrode structure comprises a first electrode layer and a first carrier transport layer disposed on the first electrode layer, wherein the second electrode structure comprises a second carrier transport layer disposed on the light-emitting layer and a second electrode layer disposed on the second carrier transport layer, and wherein one of the first electrode layer and the second electrode layer is a reflective electrode and another one of the first electrode layer and the second electrode layer is a transparent electrode.