# US 2013/0153871 A1 · Top-emitting white organic light-emitting diodes having improved efficiency and stability > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0153871 A1 - Document ID: US20130153871A1 - Status: Published application - Kind: A1 - Application number: 13/712,845 - Filed: 2012-12-12 - Published: 2013-06-20 - Earliest claimed: 2011-12-14 - Assignees: Nitto Denko Corporation - Inventors: LIPING MA; QIANXI LAI; BRETT T. HARDING; SHIJUN ZHENG; AMANE MOCHIZUKI - Web page: https://patentgrep.com/patent/US20130153871A1 ## CPC - H10K 50/11: characterised by the electroluminescent [EL] layers - H10K 50/13: comprising stacked EL layers within one EL unit - H10K 50/131: {with spacer layers between the electroluminescent layers} - H10K 50/18: Carrier blocking layers - H10K 85/342: {comprising iridium} - H10K 85/615: {Polycyclic condensed aromatic hydrocarbons, e.g. anthracene} - H10K 85/633: {comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom} - H10K 85/636: {comprising heteroaromatic hydrocarbons as substituents on the nitrogen atom} - H10K 85/654: {comprising only nitrogen as heteroatom (H10K85/652 takes precedence)} - H10K 85/657: {Polycyclic condensed heteroaromatic hydrocarbons} - H10K 85/6572: {comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole} - H10K 2101/10: Triplet emission - H10K 2101/27: {Combination of fluorescent and phosphorescent emission} - H10K 2101/40: Interrelation of parameters between multiple constituent active layers or sublayers, e.g. HOMO values in adjacent layers - H10K 2102/3026: {Top emission} - H10K 2102/351: {Thickness} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract Treatment for Cancer Using A Preparation containing a combination of one or more Natural or Synthetic or a Combination of Natural and Synthetic Boswellic Acids and one or more Natural or Synthetic or a Combination of Natural and Synthetic Cytokinins such as Kinetin, Kinetin Riboside and other Cytokinins and (the Preparation) could also contain one or more Natural or Synthetic or a Combination of Natural and Synthetic plant growth hormones such as Auxins in any percentage Ratio and could Optionally include Pharmaceutically Suitable Radioactive Agent (Radio Therapy) in any percentage ratio as a “Stand Alone” Treatment for Cancer or to Be used in Conjunction with other Pharmaceutically Suitable Therapy and Treatment(s) in any percentage ratio as a Treatment for Treating Cancer. ## Claims ### Claim 1 A top-emission white organic light-emitting diode (OLED) comprising an emissive construct, wherein the emissive construct comprises: a fluorescent emissive layer comprising a first host material; a phosphorescent emissive layer comprising a second host material; a partial hole-blocking layer having a first thickness disposed between the fluorescent emissive layer and phosphorescent emissive layer; and wherein the fluorescent emissive layer and the phosphorescent emissive layer define a recombination zone having a second thickness; and wherein the first thickness is less than about one-third of the second thickness. ### Claim 2 (depends on 1) The top-emission white OLED according to claim 1, wherein the first thickness is in the range of about 0.5 nm to about 3 nm. ### Claim 3 (depends on 1) The top-emission white OLED according to claim 1, wherein the partial hole-blocking layer allows about 50% to about 95% of the holes reaching the hole blocking layer to pass from the phosphorescent emissive layer to the fluorescent emissive layer, or allows about 50% to about 95% of the holes reaching the hole blocking layer to pass from the fluorescent emissive layer to the phosphorescent emissive layer. ### Claim 4 (depends on 1) The top-emission white OLED according to claim 1, wherein the first host emits blue light. ### Claim 5 (depends on 4) The top-emission white OLED according to claim 4, wherein the fluorescent emissive layer is undoped. ### Claim 6 (depends on 4) The top-emission white OLED according to claim 4, wherein the fluorescent emissive layer comprises a blue light-emitting fluorescent dopant. ### Claim 7 (depends on 6) The top-emission white OLED according to claim 6, where the first host material has a T1 that is lower than a T1 of the blue light-emitting fluorescent dopant. ### Claim 8 (depends on 6) The top-emission white OLED according to claim 6, where the first host material has a S1 energy level that is higher than a S1 energy level of the blue light-emitting fluorescent dopant. ### Claim 9 (depends on 6) The top-emission white OLED according to claim 6, where the first host material has a singlet energy that is higher than a singlet energy of the blue light-emitting fluorescent dopant. ### Claim 10 (depends on 1) The top-emission white OLED according to claim 1, wherein the phosphorescent emissive layer comprises a phosphorescent dopant, wherein the light emitted by the phosphorescent dopant provides white light when combined with the light emitted by the fluorescent emissive layer. ### Claim 11 (depends on 10) The top-emission white OLED according to claim 10, wherein the phosphorescent emissive layer comprises a yellow-emitting phosphorescent dopant and a red-emitting phosphorescent dopant. ### Claim 12 (depends on 1) The top-emission white OLED according to claim 1, wherein both the fluorescent emissive layer and the phosphorescent emissive layer are about 20 nm thick. ### Claim 13 (depends on 1) The top-emission white OLED according to claim 1, wherein the phosphorescent emissive layer further comprises a first sub-layer and a second sub-layer, wherein the first sub-layer comprises a yellow-emitting phosphorescent dopant and the second sub-layer comprises a red-emitting phosphorescent dopant. ### Claim 14 (depends on 1) The top-emission white OLED according to claim 1, wherein a highest occupied molecular orbital of the hole-blocking layer has a higher energy than a highest occupied molecular orbital of the first host material. ### Claim 15 (depends on 1) The top-emission white OLED according to claims 1, further comprising an anode and a cathode, wherein the emissive construct is positioned between the anode and the cathode. ### Claim 16 (depends on 15) The top-emission white OLED according to claim 15, further comprising: a hole-injection layer disposed over the anode; a hole-transport layer disposed over the hole-injection layer; wherein the emissive construct is over the hole-transport layer; an electron transporting layer disposed over the emissive construct; an electron injection layer disposed on the electron transporting layer; and wherein the cathode is disposed on the electron transport layer. ### Claim 17 A method for color tuning a top-emission white organic light-emitting diode, comprising: inserting a partial hole-blocking layer having a first thickness between a fluorescent emissive layer and a phosphorescent emissive layer, wherein the fluorescent emissive layer and the phosphorescent emissive layer combined has a second thickness, and the first thickness is less than about one-third of the second thickness; and adjusting the first thickness to tune the color of the top-emission white organic light-emitting diode. ### Claim 18 (depends on 17) The method for color tuning a top-emission white organic light-emitting diode according to claim 17, wherein adjusting the first thickness comprises increasing the first thickness to provide a desired blue shift in color. ### Claim 19 (depends on 17) The method for color tuning a top-emission white organic light-emitting diode according to claim 17, wherein adjusting the first thickness comprises decreasing the first thickness to provide a desired red shift in color.