# US 2013/0153868 A1 · Organic electroluminescent apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0153868 A1 - Document ID: US20130153868A1 - Status: Published application - Kind: A1 - Application number: 13/692,977 - Filed: 2012-12-03 - Published: 2013-06-20 - Earliest claimed: 2011-12-19 - Assignees: Au Optronics Corporation - Inventors: Chang-Yen Wu; Meng-Ting Lee; Meng-Huan Ho; Ting-Yi Cho; Po-Hsuan Chiang; Chieh-Wei Chen - Web page: https://patentgrep.com/patent/US20130153868A1 ## CPC - H10K 50/13: comprising stacked EL layers within one EL unit - H10K 50/131: {with spacer layers between the electroluminescent layers} - H10K 50/19: Tandem OLEDs - H10K 50/11: characterised by the electroluminescent [EL] layers - H10K 85/6572: {comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole} - H10K 85/6576: {comprising only sulfur in the heteroaromatic polycondensed ring system, e.g. benzothiophene} - H10K 2101/10: Triplet emission - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract An organic electroluminescent apparatus including an anode, a cathode, a first organic light emitting unit layer, a plurality of second organic light emitting unit layers, and a plurality of bonding layers is provided. The first organic light emitting unit layer has a phosphorescent host material for emitting blue light. The second organic light emitting unit layers have a host material for emitting light other than blue light. The first organic light emitting unit layer and the second organic light emitting unit layers are located between the anode and the cathode to obtain white light by mixing light. Each of the bonding layers is located between the first organic light emitting unit layer and one of the second organic light emitting unit layers or between two of the second organic light emitting unit layers. ## Claims ### Claim 1 An organic electroluminescent apparatus comprising: an anode; a cathode; a first organic light emitting unit layer having a phosphorescent host material for emitting blue light; a plurality of second organic light emitting unit layers having a host material for emitting light other than blue light, wherein the first organic light emitting unit layer and the second organic light emitting unit layers are located between the anode and the cathode to obtain white light by mixing light; and a plurality of bonding layers, each of the bonding layers being located between the first organic light emitting unit layer and one of the second organic light emitting unit layers or between two of the second organic light emitting unit layers. ### Claim 2 (depends on 1) The organic electroluminescent apparatus as recited in claim 1, wherein one of the second organic light emitting unit layers has a host material for emitting red light and green light. ### Claim 3 (depends on 2) The organic electroluminescent apparatus as recited in claim 2, wherein the host material of the one of the second organic light emitting unit layers for emitting the red light and the green light is a fluorescent material or a phosphorescent material. ### Claim 4 (depends on 2) The organic electroluminescent apparatus as recited in claim 2, wherein another one of the second organic light emitting unit layers has a host material for emitting red light or green light. ### Claim 5 (depends on 4) The organic electroluminescent apparatus as recited in claim 4, wherein the host material of the another one of the second organic light emitting unit layers for emitting the red light or the green light is a fluorescent material or a phosphorescent material. ### Claim 6 (depends on 1) The organic electroluminescent apparatus as recited in claim 1, wherein the first organic light emitting unit layer further has a host material for emitting red light or green light. ### Claim 7 (depends on 6) The organic electroluminescent apparatus as recited in claim 6, wherein the host material of the first organic light emitting unit layer for emitting the red light or the green light is a fluorescent material or a phosphorescent material. ### Claim 8 (depends on 1) The organic electroluminescent apparatus as recited in claim 1, wherein each of the bonding layers comprises: an electron transporting layer; a charge connecting layer; and a hole transporting layer located between the charge connecting layer and the cathode, wherein the charge connecting layer is located between the electron transporting layer and the hole transporting layer. ### Claim 9 (depends on 1) The organic electroluminescent apparatus as recited in claim 1, further comprising an electron transporting layer located between the cathode and one of the second organic light emitting unit layers closest to the cathode. ### Claim 10 (depends on 1) The organic electroluminescent apparatus as recited in claim 1, further comprising a hole transporting layer located between the first organic light emitting unit layer and the anode. ### Claim 11 (depends on 2) The organic electroluminescent apparatus as recited in claim 2, wherein the second organic light emitting unit layers comprise at least two layers both having the host material for emitting the red light and the green light. ### Claim 12 (depends on 4) The organic electroluminescent apparatus as recited in claim 4, wherein the second organic light emitting unit layers comprise two layers, one of the two layers has the host material for emitting the red light, and the other layer has the host material for emitting the green light.