Patent · US Active

Organic electroluminescent device

US11450817B2 · kind B2 · utility

0Cited by

1References

7Claims

0Family size

Assignee

KYULUX, INC. · JP

Inventors

Hajime Nakanotani · Fukuoka, JP
Chihaya Adachi · Fukuoka, JP
Takahiro Higuchi · Heidingsfeld, DE
Taro FURUKAWA · Fukuoka, JP

Key dates

Filing date	Oct 15, 2020
Grant date	Sep 20, 2022
Priority date	—
Expiry date	Mar 28, 2041

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02B20/00
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

An organic electroluminescent device having an anode, a cathode, and a light emitting layer between the anode and the cathode, in which the light emitting layer contains a first organic compound, a second organic compound, and a third organic compound that satisfy the following expression (A), the second organic compound is a delayed fluorescent material, and the third organic compound is a light emitting material, is capable of enhancing the light emission efficiency. ES1(A), ES1(B) and ES1(C) represent a lowest singlet excitation energy level of the first, second and third organic compound, respectively. ES1(A)>ES1(B)>ES1(C) (A)

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.