US 12,284,904 B2
Light emitting device and production method thereof, and composition for light emitting device and production method thereof
Toshiaki Sasada, Tsukuba (JP); and Ryuji Matsumoto, Nomi (JP)
Assigned to SUMITOMO CHEMICAL COMPANY, LIMITED, Tokyo (JP)
Appl. No. 17/442,893
Filed by Sumitomo Chemical Company, Limited, Tokyo (JP)
PCT Filed Mar. 29, 2019, PCT No. PCT/JP2019/014087
§ 371(c)(1), (2) Date Sep. 24, 2021,
PCT Pub. No. WO2020/202279, PCT Pub. Date Oct. 8, 2020.
Prior Publication US 2022/0199904 A1, Jun. 23, 2022
Int. Cl. H01L 51/00 (2006.01); H10K 85/30 (2023.01); H10K 85/60 (2023.01); H10K 50/11 (2023.01); H10K 101/10 (2023.01)
CPC H10K 85/322 (2023.02) [H10K 85/623 (2023.02); H10K 85/626 (2023.02); H10K 85/636 (2023.02); H10K 85/6572 (2023.02); H10K 85/6576 (2023.02); H10K 50/11 (2023.02); H10K 2101/10 (2023.02)] 6 Claims
 
1. A method for producing a light emitting device having an anode, a cathode, and an organic layer disposed between said anode and said cathode, comprising:
a step of preparing a first light emitting device comprising an anode, a cathode, and a first organic layer disposed between the anode and the cathode;
a step of evaluating a performance of the first light emitting device; and
a step of producing a second light emitting device comprising the anode, the cathode, and a second organic layer disposed between the anode and the cathode, wherein the second light emitting device has a driving voltage lower than that of the first light emitting device,
wherein said first organic layer contains a compound (A1) represented by the formula (FH) and a compound (B1) having a condensed hetero ring skeleton (b) containing a boron atom and a nitrogen atom in the ring in a combination by which the molecular weight (MA) of said compound (A1) and the molecular weight (MB) of said compound (B1) do not satisfy the formula (M1-1) and the formula (M2-1), and
said second organic layer contains a compound (A2) represented by the formula (FH) and a compound (B2) having a condensed hetero ring skeleton (b) containing a boron atom and a nitrogen atom in the ring in a combination by which the molecular weight (MA) of said compound (A2) and the molecular weight (MB) of said compound (B2) satisfy the formula (M1-1) and the formula (M2-1):

OG Complex Work Unit Chemistry
wherein,
n1H represents an integer of 0 or more,
Ar1H represents a group obtained by removing from an aromatic hydrocarbon n1H or more hydrogen atoms bonding directly to atoms constituting the ring, and this group optionally has a substituent, when a plurality of the substituents are present, they may be the same or different and may be combined together to form a ring together with atoms to which they are attached,
R1H represents an aryl group, a monovalent hetero ring group or a substituted amino group, and these groups optionally have a substituent, when a plurality of the substituents are present, they may be the same or different and may be combined together to form a ring together with atoms to which they are attached, when a plurality of R1H are present, they may be the same or different, said monovalent hetero ring group is a group obtained by removing from a heterocyclic compound not having said condensed hetero ring skeleton (b) one hydrogen atom bonding directly to an atom constituting the ring, and this group optionally has a substituent.