	US 12,435,269 B2
	Organic electroluminescent element and electronic appliance
Takushi Shiomi, Chiyoda-ku (JP); Keiichi Yasukawa, Chiyoda-ku (JP); Hiromi Nakano, Chiyoda-ku (JP); and Toshinari Ogiwara, Chiyoda-ku (JP)
Assigned to IDEMITSU KOSAN CO., LTD., Tokyo (JP)
Appl. No. 17/764,778
Filed by IDEMITSU KOSAN CO., LTD., Tokyo (JP)
PCT Filed Jan. 22, 2021, PCT No. PCT/JP2021/002268 § 371(c)(1), (2) Date Mar. 29, 2022, PCT Pub. No. WO2021/166553, PCT Pub. Date Aug. 26, 2021.
Claims priority of application No. 2020-024391 (JP), filed on Feb. 17, 2020.
Prior Publication US 2022/0380387 A1, Dec. 1, 2022
Int. Cl. H01L 51/50 (2006.01); C07C 13/72 (2006.01); C07C 15/20 (2006.01); C07C 15/38 (2006.01); C07C 211/54 (2006.01); C07D 209/82 (2006.01); C07D 235/08 (2006.01); C07D 241/46 (2006.01); C07D 251/24 (2006.01); C07D 307/91 (2006.01); C07D 333/76 (2006.01); C07D 401/04 (2006.01); C07D 401/14 (2006.01); C07D 403/04 (2006.01); C07D 403/10 (2006.01); C07D 403/14 (2006.01); C07D 405/10 (2006.01); C07D 405/14 (2006.01); C07D 409/04 (2006.01); C07D 409/10 (2006.01); C07D 409/14 (2006.01); C07D 413/10 (2006.01); C07D 413/14 (2006.01); C07D 471/04 (2006.01); C07D 487/04 (2006.01); C07D 487/14 (2006.01); C07D 487/16 (2006.01); C07D 491/048 (2006.01); C07D 491/147 (2006.01); C07D 493/04 (2006.01); C07D 495/04 (2006.01); C07D 495/14 (2006.01); C07D 519/00 (2006.01); C07F 5/02 (2006.01); C07F 7/08 (2006.01); C07F 9/53 (2006.01); C09K 11/06 (2006.01); H10K 50/11 (2023.01); H10K 50/13 (2023.01); H10K 85/30 (2023.01); H10K 85/40 (2023.01); H10K 85/60 (2023.01); H10K 101/20 (2023.01)

CPC C09K 11/06 (2013.01) [C07C 13/72 (2013.01); C07C 15/20 (2013.01); C07C 15/38 (2013.01); C07C 211/54 (2013.01); C07D 209/82 (2013.01); C07D 235/08 (2013.01); C07D 241/46 (2013.01); C07D 251/24 (2013.01); C07D 307/91 (2013.01); C07D 333/76 (2013.01); C07D 401/04 (2013.01); C07D 401/14 (2013.01); C07D 403/04 (2013.01); C07D 403/10 (2013.01); C07D 403/14 (2013.01); C07D 405/10 (2013.01); C07D 405/14 (2013.01); C07D 409/04 (2013.01); C07D 409/10 (2013.01); C07D 409/14 (2013.01); C07D 413/10 (2013.01); C07D 413/14 (2013.01); C07D 471/04 (2013.01); C07D 487/04 (2013.01); C07D 487/14 (2013.01); C07D 487/16 (2013.01); C07D 491/048 (2013.01); C07D 491/147 (2013.01); C07D 493/04 (2013.01); C07D 495/04 (2013.01); C07D 495/14 (2013.01); C07D 519/00 (2013.01); C07F 5/022 (2013.01); C07F 5/027 (2013.01); C07F 7/0812 (2013.01); C07F 7/0816 (2013.01); C07F 9/5325 (2013.01); H10K 50/11 (2023.02); H10K 50/13 (2023.02); H10K 85/322 (2023.02); H10K 85/361 (2023.02); H10K 85/40 (2023.02); H10K 85/615 (2023.02); H10K 85/622 (2023.02); H10K 85/624 (2023.02); H10K 85/631 (2023.02); H10K 85/649 (2023.02); H10K 85/654 (2023.02); H10K 85/657 (2023.02); H10K 85/6572 (2023.02); H10K 85/6574 (2023.02); H10K 85/6576 (2023.02); C07B 2200/05 (2013.01); H10K 85/658 (2023.02); H10K 2101/20 (2023.02)]

26 Claims

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 having at least one deuterium atom and a compound M3 having at least one deuterium atom, 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).