Organic light emitting display device
AssigneeLG Display Co., Ltd.
InventorsHye-Seung KANG, Tae-Il KUM, Young-Kwan JUNG, Hyung-June KIM, Jung-Soo PARK
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Abstract
Disclosed is an organic light emitting display (OLED) device that may include first and second electrodes facing each other on a substrate, at least two light emitting units between the first and second electrodes, and a charge generation layer between the at least two light emitting units, the charge generation layer including an N-type charge generation layer and a P-type charge generation layer, wherein the N-type charge generation layer includes at least two hosts and a dopant, and wherein the at least two hosts have different lowest unoccupied molecular orbital (LUMO) energy levels.
Claims20
An organic light emitting display (OLED) device comprising:
- first and second electrodes facing each other on a substrate;
- at least two light emitting units between the first and second electrodes;
- and
- a charge generation layer between the at least two light emitting units, the charge generation layer including an N-type charge generation layer and a P-type charge generation layer,
- wherein the N-type charge generation layer comprises at least two hosts and a dopant, and wherein the at least two hosts have different lowest unoccupied molecular orbital (LUMO) energy levels.
An organic light emitting display (OLED) device comprising:
- first and second electrodes facing each other on a substrate;
- at least two light emitting units formed between the first and second electrodes;
- and
- a charge generation layer formed between the at least two light emitting units, the charge generation layer comprising an N-type charge generation layer and a P-type charge generation layer, wherein
- one of the at least two light emitting units comprises:
- a hole transport layer on the first electrode;
- an emission layer on the hole transport layer;
- and
- an electron transport layer on the emission layer,
- the N-type charge generation layer on the electron transport layer, the N-type charge generation layer including at least two hosts having different LUMO energy levels and a dopant, and
- the electron transport layer including any one of the at least two hosts in the N-type charge generation layer.
A method for manufacturing an organic light emitting display (OLED) device, the method comprising:
- forming a first electrode on a substrate;
- forming a first light emitting unit on the first electrode;
- forming a charge generation layer on the first light emitting unit, the charge geneation layer including a first host, a second host and a dopant;
- forming a second light emitting unit on the charge generation layer;
- and
- forming a second electrode on the second light emitting unit,
- wherein LUMO energy levels of the first host and the second host are different by about 0.1 eV or more, and wherein HOMO energy levels of the first host and the second host are different by about 0.1 eV or more.
Dependencies are inferred from the claim text.