# US 2014/0191209 A1 · Organic light-emitting device and of preparing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0191209 A1 - Document ID: US20140191209A1 - Status: Published application - Kind: A1 - Application number: 14/057,652 - Filed: 2013-10-18 - Published: 2014-07-10 - Earliest claimed: 2013-01-04 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Kyul Han; Sang-Woo Lee; Hyo-Yeon Kim; Hye-Yeon Shim; Heun-Seung Lee; Sang-Woo Pyo; Ji-Hwan Yoon - Web page: https://patentgrep.com/patent/US20140191209A1 ## CPC - H10K 59/35: comprising red-green-blue [RGB] subpixels - H10K 50/156: {comprising a multilayered structure} - H10K 59/876: {comprising a resonant cavity structure, e.g. Bragg reflector pair} - H10K 71/00: Manufacture or treatment specially adapted for the organic devices covered by this subclass - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract An organic light emitting diode (OLED) and a method of manufacturing the same. An auxiliary layer comprising a high density metallic compound and an emission layer are formed by a laser induced thermal imaging (LITI) process. The LITI process reduces manufacturing costs and time by eliminating the need for a mask patterning process. The metallic compound has a density of 2 g/cm3 or greater to promote adhesion and improve interfacial planarization. This results in improved luminance uniformity (i.e. luminance mura) between pixels within an OLED display device. ## Claims ### Claim 1 An organic light emitting device, comprising: a substrate including a first subpixel region, a second subpixel region, and a third subpixel region; a plurality of first electrodes separately arranged in the first subpixel region, the second subpixel region, and the third subpixel region of the substrate; a second electrode arranged opposite the first electrode; a first emission layer (EML) arranged in the first subpixel region to emit light having a first color; a second emission layer arranged in the second subpixel region to emit light having a second color; a first layer arranged as a common layer with respect to the first subpixel region, the second subpixel region, and the third subpixel region; and at least one of a first auxiliary layer and a second auxiliary layer, wherein the first auxiliary layer is arranged between the first emission layer and the first layer, contacts a surface of the first layer and includes a first metallic compound to facilitate transportation of electric charges from the first electrode to the first emission layer, and wherein the second auxiliary layer is arranged between the second emission layer and the first layer, contacts the surface of the first layer and includes a second metallic compound to facilitate transportation of electric charges from the first electrode to the second emission layer. ### Claim 2 (depends on 1) The organic light emitting device of claim 1, wherein the first auxiliary layer and the second auxiliary layer are produced by a laser induced thermal imaging process. ### Claim 3 (depends on 1) The organic light emitting device of claim 1, wherein the first metal compound is a metal compound which makes a first thin film exclusively including the first metal compound have a thin film density of 2 g/cm3 or greater, and the second metal compound is a metal compound which makes a second thin film exclusively including the second metal compound have a thin film density of 2 g/cm3 or greater. ### Claim 4 (depends on 1) The organic light emitting device of claim 1, wherein the first electrode is a hole injection electrode; the first layer comprises a light emitting material to emit light having a third color; the first metallic compound and the second metallic compound are oxidizing metallic compounds; and the second electrode is an electron injection electrode. ### Claim 5 (depends on 4) The organic light emitting device of claim 4, wherein the first metallic compound and the second metallic compound are each independently an oxide or a halide comprising at least one element selected from a group consisting of a Group 5 element, a Group 6 element, a Group 7, iron (Fe), antimony (Sb), and copper (Cu). ### Claim 6 (depends on 5) The organic light emitting device of claim 5, wherein the first metallic compound and the second metallic compound each independently comprise at least one compound selected from WO, W2O3, WO2, WO3, W2O5, VO, V2O3, VO2, V2O5, MoO, Mo2O3, MoO2, MoO3, Mo2O5, ReO3, FeCl3, SbCl5, and CuI. ### Claim 7 (depends on 4) The organic light emitting device of claim 4, wherein the first auxiliary layer further comprises a first organic hole transport material, and the second auxiliary layer further comprises a second organic hole transport material. ### Claim 8 (depends on 4) The organic light emitting device of claim 4, wherein the first color is red, the second color is green, and the third color is blue, wherein light having the third color is emitted from the first layer. ### Claim 9 (depends on 1) The organic light emitting device of claim 1, further comprising a second layer arranged between the first layer and the second electrode and being arranged as a common layer with respect to the first subpixel region, the second subpixel region, and the third subpixel region, the second layer comprising a light emitting material to emit light having a third color, wherein: the first electrodes are electron injection electrodes; the first layer is an electron transport layer; the first metallic compound and the second metallic compound are reducing metallic compounds; and to the second electrode is a hole injection electrode. ### Claim 10 (depends on 9) The organic light emitting device of claim 9, wherein the first metallic compound and the second metallic compound are each independently selected from a halide, an oxide, a nitride, an oxynitride, and a salt comprising at least one of an alkali metal and an alkaline earth metal. ### Claim 11 (depends on 9) The organic light emitting device of claim 9, wherein the first metallic compound and the second metallic compound each independently comprises at least one compound selected from a group consisting of LiF, KF, CsF, RbF, NaF, LiO2, Li2O2, Rb2O2, Cs2O, LiAlO2, LiBO2, LiCl, RbCl, NaCl, KCl, CsCl, KAlO2, Na2WO4, K2SiO3, Li2CO3, LiCO3, Na2CO3, NaCO3, K2CO3, KCO3, RbCO3, RbCO3, Cs2CO3, CsCO3, BeCO, BeCO3, MgCO, MgCO3, CaO, Ca2CO3, CaCO3, SrCO, SrCO3, BaCO, and BaCO3. ### Claim 12 (depends on 9) The organic light emitting device of claim 9, wherein the first auxiliary layer further comprises a first organic electron transport material and the second auxiliary layer further comprises a second organic electron transport material. ### Claim 13 (depends on 9) The organic light emitting device of claim 9, wherein the first color is red, the second color is green, the third color is blue, and light having the third color is emitted from the second layer. ### Claim 14 A method of manufacturing an organic light emitting device, comprising: forming a plurality of first electrodes in a first subpixel region, a second subpixel region, and a third subpixel region, respectively on a substrate; forming a first layer as a common layer with respect to the first subpixel region, the second subpixel region, and the third subpixel region; forming at least one of a first auxiliary layer and a second auxiliary layer, wherein the first auxiliary layer is arranged between a first emission layer and the first layer, contacts a surface of the first layer and includes a first metallic compound to facilitate transportation of electric charges from the first electrode to the first emission layer, and wherein the second auxiliary layer is arranged between a second emission layer and the first layer, contacts the surface of the first layer and includes a second metallic compound to facilitate transportation of electric charges from the first electrode to the second emission layer; forming the first emission layer in the first subpixel region to emit light of a first color; forming the second emission layer in the second subpixel region to emit light of a second color; and forming a second electrode opposite to the first electrodes. ### Claim 15 (depends on 14) The method of claim 14, wherein the first auxiliary layer and the second auxiliary layer are formed by a laser induced thermal imaging technique. ### Claim 16 (depends on 14) The method of claim 14, wherein the first metal compound is a metal compound which makes a first thin film exclusively including the first metal compound to have a thin film density of 2 g/cm3 or greater, and the second metal compound is a metal compound which makes a second thin film exclusively including the second metal compound to have a thin film density of 2 g/cm3 or greater. ### Claim 17 (depends on 14) The method of claim 14, wherein: the first electrodes are hole injection electrodes; the first layer is a common layer comprising a light emitting material to emit light of a third color; the first metallic compound and the second metallic compound are oxidizing metallic compounds; and the second electrode is an electron injection electrode. ### Claim 18 (depends on 17) The method of claim 17, wherein the first metallic compound and the second metallic compound each independently comprise at least one material selected from a group consisting of WO, W2O3, WO2, WO3, W2O5, VO, V2O3, VO2, V2O5, MoO, Mo2O3, MoO2, MoO3, Mo2O5, ReO5, FeCl3, SbCl5, and CuI. ### Claim 19 (depends on 14) The method of claim 14, further comprising forming a second layer between the first layer and the second electrode, the second layer being a common layer with respect to the first subpixel region, the second subpixel region, and the third subpixel region, the second layer including a light emitting material to emit light of a third color, wherein: the first electrodes are electron injection electrodes; the first layer is an electron transport layer; the first metallic compound and the second metallic compound are reducing metallic compounds; and the second electrode is a hole injection electrode. ### Claim 20 (depends on 19) The method of claim 19, wherein the first metallic compound and the second metallic compound each independently comprises at least one material selected from a group consisting of LiF, KF, CsF, RbF, NaF, LiO2, Li2O2, Rb2O2, Cs2O, LiAlO2, LiBO2, LiCl, RbCl, NaCl, KCl, CsCl, KAlO2, Na2WO4, K2SiO3, Li2CO3, LiCO3, Na2CO3, NaCO3, K2CO3, KCO3, RbCO3, RbCO3, Cs2CO3, CsCO3, BeCO, BeCO3, MgCO, MgCO3, CaO, Ca2CO3, CaCO3, SrCO, SrCO3, BaCO and BaCO3.