US 12,075,699 B2
Organic electroluminescence element and electronic device
Takushi Shiomi, Chiyoda-ku (JP); Toshinari Ogiwara, Chiyoda-ku (JP); and Hiromi Nakano, Chiyoda-ku (JP)
Assigned to IDEMITSU KOSAN CO., LTD., Tokyo (JP)
Appl. No. 17/764,846
Filed by IDEMITSU KOSAN CO.,LTD., Tokyo (JP)
PCT Filed Jan. 22, 2021, PCT No. PCT/JP2021/002267
§ 371(c)(1), (2) Date Mar. 29, 2022,
PCT Pub. No. WO2021/166552, PCT Pub. Date Aug. 26, 2021.
Claims priority of application No. 2020-024283 (JP), filed on Feb. 17, 2020.
Prior Publication US 2023/0048761 A1, Feb. 16, 2023
Int. Cl. H01L 51/50 (2006.01); C07D 209/86 (2006.01); C07D 405/10 (2006.01); C07D 405/14 (2006.01); C07D 491/048 (2006.01); C07D 495/04 (2006.01); C09K 11/06 (2006.01); H10K 85/60 (2023.01); H10K 50/11 (2023.01)
CPC H10K 85/6572 (2023.02) [C07D 209/86 (2013.01); C07D 405/10 (2013.01); C07D 405/14 (2013.01); C07D 491/048 (2013.01); C07D 495/04 (2013.01); C09K 11/06 (2013.01); H10K 85/654 (2023.02); H10K 85/657 (2023.02); H10K 85/6574 (2023.02); C07B 2200/05 (2013.01); C09K 2211/1018 (2013.01); H10K 50/11 (2023.02)] 27 Claims
OG exemplary drawing
 
1. An organic electroluminescence device, comprising:
an anode;
a cathode; and
an emitting layer disposed between the anode and the cathode, wherein:
the emitting layer comprises a delayed fluorescent compound M2 and a compound M3 having at least one deuterium atom,
the compound M3 is not a compound having a partial structure represented by a formula (1C) or (2C) below, and
a singlet energy S1(M2) of the compound M2 and a singlet energy S1(M3) of the compound M3 satisfy a relationship of a numerical formula (Numerical Formula 1) below,
S1(M3)>S1(M2)  (Numerical Formula 1),

OG Complex Work Unit Chemistry
wherein:
Y41 to Y48 are each independently a nitrogen atom, CR, or a carbon atom bonded to another atom or another structure in a molecule of the compound M3;
at least one of Y41 to Y48 is a nitrogen atom:
at least one of Y41 to Y48 is a carbon atom bonded to another atom or another structure in the molecule of the compound M3, each R is independently a hydrogen atom or a substituent; and
a plurality of R are mutually the same or different.