US 12,677,529 B2Granted

Organic light emitting device

AssigneeLG Display Co., Ltd.

InventorsChun-Ki Kim, Jeong-Eun Won, Seung-Ryong Joung, Yo-Sub Lee

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Abstract

An organic light emitting device (e.g., a display device or a lighting device) is described, which includes a substrate; and an OLED over the substrate, the organic light emitting diode comprising: a cathode; an anode over the cathode; and an organic light emitting layer including a first emitting part, a second emitting part between the first emitting part and the anode and a third emitting part between the first and second emitting parts. The first emitting part includes a first EML, a p-doping layer between the cathode and the first EML, an n-doping layer between the first EML and the p-doping layer and a first ETL between the first EML and the n-doping layer. The second emitting part includes a second EML, and the third emitting part includes a third EML. The p-doping layer includes an HTL and first and second p-doping layers at both sides of the HTL, respectively.

Claims20

Dependent claims

An organic light emitting device, comprising:

a substrate;
and
an organic light emitting diode over the substrate, the organic light emitting diode comprising:
a cathode over the substrate;
an anode over the cathode;
and
an organic light emitting layer positioned between the cathode and the anode,
and comprising a first emitting part, a second emitting part between the first emitting
part and the anode and a third emitting part between the first and second emitting parts,
wherein the first emitting part comprises a first emitting material layer, a p-doping layer between the cathode and the first emitting material layer, an n-doping layer between the first emitting material layer and the p-doping layer, and a first electron transporting layer between the first emitting material layer and the n-doping layer,
wherein the second emitting part comprises a second emitting material layer, and the third emitting part comprises a third emitting material layer, and
wherein the p-doping layer comprises a hole transporting material layer, and a first p-doping layer and a second p-doping layer positioned at sides of the hole transporting material layer, respectively.

9 more elements

Dependencies are inferred from the claim text.