US 11,997,870 B2
Organic electroluminescent element and method for producing same
Kouki Kase, Tokyo (JP); Takeshi Yamamoto, Tokyo (JP); Kazuyuki Suruga, Tokyo (JP); Shunji Mochizuki, Tokyo (JP); and Shuichi Hayashi, Tokyo (JP)
Assigned to HODOGAYA CHEMICAL CO., LTD., Tokyo (JP)
Filed by HODOGAYA CHEMICAL CO., LTD., Tokyo (JP)
Filed on May 30, 2023, as Appl. No. 18/325,613.
Application 18/325,613 is a division of application No. 16/954,913, granted, now 11,706,943, previously published as PCT/JP2018/047294, filed on Dec. 21, 2018.
Claims priority of application No. 2017-244969 (JP), filed on Dec. 21, 2017.
Prior Publication US 2023/0309339 A1, Sep. 28, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H10K 50/844 (2023.01)
CPC H10K 50/844 (2023.02) 11 Claims
OG exemplary drawing
 
1. An organic electroluminescent element comprising at least an anode, a hole transport layer, a luminous layer, an electron transport layer, a cathode and a capping layer in this order,
wherein the capping layer comprises an amine compound having a benzazole ring structure represented by a general formula (A-1),

OG Complex Work Unit Chemistry
wherein in formula (A-1), A and X may be the same or different from each other, and each represents a monovalent group represented by the following general formulae (B-4), or (B-6); Z represents a substituted or unsubstituted aromatic heterocyclic group; and Ar may be the same or different from each other, and each represents a single bond or a divalent group of a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted fused polycyclic aromatic group,

OG Complex Work Unit Chemistry
wherein in formulae (B-4), or (B-6), a broken line part is used as a binding site; R12 to R15 may be the same or different from each other, and each represents a hydrogen atom, a deuterium atom, a fluorine atom, a chlorine atom, a cyano group, nitro group, a straight or branched alkyl group having 1 to 6 carbon atoms which may have a substituent, a cycloalkyl group having 5 to 10 carbon atoms which may have a substituent, a straight or branched alkenyl group having 2 to 6 carbon atoms which may have a substituent, a straight or branched alkyloxy group having 1 to 6 carbon atoms which may have a substituent, a cycloalkyloxy group having 5 to 10 carbon atoms which may have a substituent, a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic ring group, a substituted or unsubstituted fused polycyclic aromatic group or a substituted or unsubstituted aryloxy group.