# US 10,483,327 B2 · Light emitting diode and display device including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,483,327 B2 - Document ID: US10483327B2 - Status: Granted - Kind: B2 - Application number: 15/858,252 - Filed: 2017-12-29 - Published: 2018-09-20 - Granted: 2019-11-19 - Earliest claimed: 2017-03-14 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Dong Chan Kim; Won Jong Kim; Ji Young Moon; Dong Kyu Seo; Myung Chul Yeo; Ji Hye Lee; Yoon Hyeung Cho - Web page: https://patentgrep.com/patent/US10483327B2 ## CPC - H10K 59/32: Stacked devices having two or more layers, each emitting at different wavelengths - H10K 50/19: Tandem OLEDs - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract A light-emitting diode includes a first electrode, a second electrode overlapping the first electrode, a first emission layer and a second emission layer provided between the first electrode and the second electrode, and a first charge generating layer provided between the first emission layer and the second emission layer, the first charge generating layer including a p-type charge generating layer and an n-type charge generating layer. The n-type charge generating layer may include an organic material and an inorganic material doped to the organic material, and the inorganic material may include a lanthanide metal or an alkali earth metal, and an alkali halide. ## Claims ### Claim 1 A light-emitting diode, comprising: a first electrode; a second electrode overlapping the first electrode; a first emission layer and a second emission layer provided between the first electrode and the second electrode; and a first charge generating layer provided between the first emission layer and the second emission layer, the first charge generating layer including a p-type charge generating layer and an n-type charge generating layer, wherein: the n-type charge generating layer includes an organic material and an inorganic material doped to the organic material, the inorganic material includes a lanthanide metal, an alkali halide, and a ternary compound generated by combining the lanthanide metal and the alkali halide, or the inorganic material includes an alkali earth metal, the alkali halide, and a ternary compound generated by combining the alkali earth metal and the alkali halide. ### Claim 2 (depends on 1) The light-emitting diode as claimed in claim 1, wherein the p-type charge generating layer includes a transition metal halide. ### Claim 3 (depends on 2) The light-emitting diode as claimed in claim 2, wherein the p-type charge generating layer includes at least one selected from among CuI, AgI, AuI, ZnI2, NiI2, PdI2, PtI2, CoI2, RhI2, IrI2, FeI2, RuI2, IrI2, FeI2, RuI2, OsI2, MnI2, TcI2, ReI2, CrI3, MoI3, WI3, VI3, NbI3, TaI3, TiI4, ZrI4, HfI4, SnI2, SnI4, GeI2, GeI4, CuBr, AgBr, AuBr, ZnBr2, NiBr2, PdBr2, PtBr2, CoBr2, RhBr2, IrBr2, FeBr2, RuBr2, IrBr2, FeBr2, RuBr2, OsBr2, MnBr2, TcBr2, ReBr2, CrBr3, MoBr3, WBr3, VBr3, NbBr3, TaBr3, TiBr4, ZrBr4, HfBr4, CuCl, AgCl, AuCl, ZnCl2, NiCl2, PdCl2, PtCl2, CoCl2, RhCl2, IrCl2, FeCl2, RuCl2, IrCl2, FeCl2, RuCl2, OSCl2, MnCl2, TcCl2, ReCl2, CrCl3, MoCl3, WCl3, VCl3, NbCl3, TaCl3, TiCl4, ZrCl4, and HfCl4. ### Claim 4 (depends on 2) The light-emitting diode as claimed in claim 2, wherein the p-type charge generating layer does not include an organic material. ### Claim 5 (depends on 2) The light-emitting diode as claimed in claim 2, wherein the p-type charge generating layer includes a transition metal halide doped to an organic material. ### Claim 6 (depends on 1) The light-emitting diode as claimed in claim 1, wherein a content of an inorganic material doped on the n-type charge generating layer is about 1 volume % to about 25 volume %. ### Claim 7 (depends on 6) The light-emitting diode as claimed in claim 6, wherein a volume ratio of the lanthanide metal or the alkali earth metal from among the inorganic material vs. the alkali halide is about 1:1. ### Claim 8 (depends on 1) The light-emitting diode as claimed in claim 1, wherein the inorganic material includes: at least one metal selected from among La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Mg, Ca, Sr, Ba, and Ra, at least one alkali halide selected from among LiCl, NaCl, KCl, RbCl, CsCl, FrCl, LiBr, NaBr, KBr, RbBr, CsBr, FrBr, LiI, NaI, KI, RbI, CsI, and FrI, and a ternary compound generated by combining one selected from among the metals and one selected from among the alkali halides. ### Claim 9 (depends on 8) The light-emitting diode as claimed in claim 8, wherein the inorganic material includes at least one selected from Yb, Eu, Sm, Tm, Mg, Ca, Sr, KI, RbI, CsI, YbKI3, YbRbI3, and YbCsI3. ### Claim 10 (depends on 1) The light-emitting diode as claimed in claim 1, wherein the light-emitting diode further includes: a third emission layer provided between the first electrode and the second electrode; and a second charge generating layer provided between the second emission layer and the third emission layer, the second charge generating layer including a second p-type charge generating layer and a second n-type charge generating layer, wherein: the second n-type charge generating layer includes an organic material and an inorganic material doped to the organic material, and the inorganic material includes an alkali halide doped to the lanthanide metal or the alkali earth metal. ### Claim 11 (depends on 10) The light-emitting diode as claimed in claim 10, wherein the second p-type charge generating layer includes a transition metal halide. ### Claim 12 A display device, comprising: a substrate; a transistor provided on the substrate; and a light-emitting diode connected to the transistor, the light-emitting diode including: a first electrode, a second electrode overlapping the first electrode, a first emission layer and a second emission layer provided between the first electrode and the second electrode, and a first charge generating layer provided between the first emission layer and the second emission layer, the first charge generating layer including a p-type charge generating layer and an n-type charge generating layer, wherein: the n-type charge generating layer includes an organic material and an inorganic material doped to the organic material, the inorganic material includes a lanthanide metal, an alkali halide, and a ternary compound generated by combining the lanthanide metal and the alkali halide, or the inorganic material includes an alkali earth metal, the alkali halide, and a ternary compound generated by combining the alkali earth metal and the alkali halide. ### Claim 13 (depends on 12) The display device as claimed in claim 12, wherein the p-type charge generating layer includes a transition metal halide. ### Claim 14 (depends on 12) The display device as claimed in claim 12, wherein the p-type charge generating layer does not include an organic material. ### Claim 15 (depends on 12) The display device as claimed in claim 12, wherein the p-type charge generating layer includes a transition metal halide doped to the organic material. ### Claim 16 (depends on 12) The display device as claimed in claim 12, wherein a content of an inorganic material doped from among the n-type charge generating layer is about 1 volume % to about 25 volume %. ### Claim 17 (depends on 16) The display device as claimed in claim 16, wherein a volume ratio of the lanthanide metal or the alkali earth metal from among the inorganic material vs. the alkali halide is about 1:1. ### Claim 18 (depends on 12) The display device as claimed in claim 12, wherein the display device further includes: a third emission layer provided between the first electrode and the second electrode; and a second charge generating layer provided between the second emission layer and the third emission layer, the second charge generating layer including a second p-type charge generating layer and a second n-type charge generating layer, wherein: the second n-type charge generating layer includes an organic material and an inorganic material doped to the organic material, and the inorganic material includes an alkali halide doped to the lanthanide metal or the alkali earth metal.