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

Filing Date

2020-09-11

Application No.

17642220

Claims

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