Organic EL Device with Different Host Materials

ChangeBridge: Patent Grants - Organic Chemistry (C07D)

Published March 24th, 2026

Detected March 24th, 2026

Summary

The USPTO has granted a patent for an organic electroluminescent (EL) device. The patent describes a device with two emitting layers, each containing a different host material and a compound that emits fluorescence with a main peak wavelength of 500 nm or less. The patent specifies a condition for the triplet energy of the host materials.

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What changed

The United States Patent and Trademark Office (USPTO) has granted patent US12583864B2 for an organic electroluminescent (EL) device. This patent details a specific configuration involving two distinct emitting layers, each utilizing a different host material. A key feature is the inclusion of a compound that emits fluorescence with a main peak wavelength of 500 nm or less in both layers, with a specified relationship between the triplet energies of the host materials (T1(H1) > T1(H2)). The patent was filed on September 11, 2020, and granted on March 24, 2026, to IDEMITSU KOSAN CO., LTD.

This patent grant establishes intellectual property rights for the described organic EL device technology. Manufacturers in the organic electronics sector, particularly those involved in the development and production of OLED displays or lighting, should be aware of this patent. While this is a patent grant and not a regulatory rule imposing direct compliance obligations, it may impact product development, licensing strategies, and freedom to operate in the organic EL market. Companies should consult their legal counsel regarding potential infringement risks or licensing opportunities related to this patent.

Source document (simplified)

← USPTO Patent Grants

Organic electroluminescent element and electronic device

Grant US12583864B2 Kind: B2 Mar 24, 2026

Assignee

IDEMITSU KOSAN CO., LTD.

Inventors

Satomi Tasaki, Kazuki Nishimura, Ryoji Maeda, Yuichiro Kawamura, Yuki Nakano

Abstract

An organic EL device includes a first emitting layer and a second emitting layer, in which the first emitting layer contains a first host material, the second emitting layer contains a second host material, the first and the second host material are mutually different, the first emitting layer and the second emitting layer at least contains a compound that emits fluorescence having a main peak wavelength of 500 nm or less, respectively, the compound contained in the first emitting layer and that emits fluorescence having a main peak wavelength of 500 nm or less is the same as or different from the compound contained in the second emitting layer, and a triplet energy T1(H1) of the first host material and a triplet energy T1(H2) of the second host material satisfy a numerical formula (Numerical Formula 1),

T1(H1)>T1(H2) (Numerical Formula 1).

CPC Classifications

C07D 493/04 C07D 211/54 C07D 231/56 C07D 241/38 C07D 251/24 C07D 307/91 C07D 311/82 C07D 333/76 C07D 403/10 C07D 403/14 C07D 405/10 C07D 405/12 C07D 471/06 C07D 487/06 C07D 491/04 C07D 491/16 C07D 491/22 C07D 495/04 C07D 495/22 C07D 519/00 C07C 13/62 C07C 15/28 C07C 15/30 C07C 15/38 C07C 15/20 C07C 255/34 C07C 255/51 C07C 2603/18 C07C 2603/26 C07C 2603/40 C07C 2603/42 C07C 2603/50 C07C 2603/52 C07C 2603/94 C07F 1/02 C07F 5/027 C07F 7/081 C07F 7/0812 C07F 7/0816 H10K 50/11 H10K 85/40 H10K 85/615 H10K 85/622 H10K 85/623 H10K 85/624 H10K 85/631 H10K 85/633 H10K 85/636 H10K 85/652 H10K 85/654 H10K 85/657 H10K 85/6572 H10K 85/6574 H10K 85/6576 H10K 85/658 H10K 2101/10 H10K 50/13 H10K 2102/351 H10K 85/626 H10K 50/12 H10K 50/15 H10K 50/16 C07B 2200/05 C07B 59/001 C07B 59/002 H05B 33/12