IP Library › Granted Patent US 11,588,109
Granted Patent B2
US 11,588,109 · App. 16/742,060 · Granted Feb 21, 2023

Organic electroluminescent device

Inventors: Tae Hyung Kim (Seongnam-si, KR); HoCheol Park (Suwon-si, KR); Young Bae Kim (Hwaseong-si, KR); Chang Jun Lee (Ansan-si, KR); Eunjung Lee (Seoul, KR); Youngmi Beak (Yongin-si, KR)
Assignee: SOLUS ADVANCED MATERIALS CO., LTD.
H01L51/0067C09K11/025C09K11/06H01L51/0054H01L51/0058H01L51/0071H01L51/0072H01L51/0085H01L51/50C09K2211/1007C09K2211/1029C09K2211/185H01L51/504H01L51/5004H01L51/5012H01L51/5016H01L51/5056H01L51/5072H01L51/5092H01L51/5096H01L2251/552
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Quick Facts
Patent No.
US 11,588,109
App. No.
16/742,060
Granted
Feb 21, 2023
Kind
B2
Abstract

The present disclosure provides an organic electroluminescent device including: an anode; a cathode; and one or more organic material layers interposed between the anode and cathode and selected from the group consisting of a hole injection layer, a hole transporting layer, a light emitting layer, an electron transporting layer, and an electron injection layer, and further including a lifetime enhancement layer (LEL) between the light emitting layer and the electron transporting layer.

Claims (7)

1. An organic electroluminescent device comprising:

an anode;

a cathode; and

one or more organic material layers interposed between the anode and the cathode,

wherein said one or more organic material layers comprise (a) a light emitting layer, (b) a lifetime enhancement layer consisting of a bipolar compound, (c) an electron transporting layer, and (d) at least one layer selected from the group consisting of a hole injection layer, a hole transporting layer, and an electron injection layer,

wherein the lifetime enhancement layer is interposed between the light emitting layer and the electron transporting layer, and

wherein the bipolar compound is selected from the group consisting of the following formulae LE-33 and LE-35:

Assignments (2)
CHANGE OF NAME Recorded Dec 29, 2020
From: DOOSAN SOLUS CO., LTD.
To: SOLUS ADVANCED MATERIALS CO., LTD.
Reel/Frame 054867/0169 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 16, 2020
From: DOOSAN CORPORATION
To: DOOSAN SOLUS CO., LTD.
Reel/Frame 052128/0274 →