公开(公告)号：US20240352009A1

公开(公告)日：2024-10-24

申请号：US18694173

申请日：2022-10-26

Applicant: HODOGAYA CHEMICAL CO., LTD.

Inventor： Kouki KASE ,  Byung-Sun YANG ,  Moon-Chan HWANG ,  Junichi IZUMIDA ,  Yuta HIRAYAMA ,  Shuichi HAYASHI

IPC: C07D417/10 ,  C07D413/10 ,  C07D413/14 ,  C07D417/14 ,  C07D487/04 ,  H10K85/60

CPC classification number: C07D417/10 ,  C07D413/10 ,  C07D413/14 ,  C07D417/14 ,  C07D487/04 ,  H10K85/615 ,  H10K85/631 ,  H10K85/654 ,  H10K85/6572 ,  H10K85/6574 ,  H10K85/6576

Abstract: In order to prevent deterioration inside an organic EL element and significantly improve the light extraction efficiency, an object of the present invention is to provide a compound that absorbs light rays with wavelengths of 400 to 410 nm of sunlight, thereby preventing them from affecting a material inside the element, and has a high refractive index in a wavelength range of 450 to 750 nm. The present invention provides an amine compound having a specific benzazole ring structure having a high refractive index. An organic EL element having excellent light emission efficiency is obtained by using the compound of the present invention as a material constituting a capping layer.

公开(公告)号：US20250129059A1

公开(公告)日：2025-04-24

申请号：US18725271

申请日：2023-01-12

Applicant: HODOGAYA CHEMICAL CO., LTD.

Inventor： Kouki KASE ,  Hiroki HIRAI ,  Moon-Chan HWANG ,  Yuta HIRAYAMA ,  Shuichi HAYASHI

IPC: C07D413/10 ,  C07D417/10 ,  H10K50/858

Abstract: It is an object of the present invention to provide a compound that has a high refractive index and a low extinction coefficient in a wavelength range of 450 to 750 nm, and is thus suitably used as a material for a capping layer of an organic EL element. Also, it is another object of the invention to provide an organic EL element including such a compound to improve the light extraction efficiency of the element. The invention is directed to a pyrimidine compound represented by a general formula (1): wherein Ar1 to Ar3 are the same or different, and each represent a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or the like, L1 to L3 are the same or different, and each represent a single bond, a substituted or unsubstituted divalent aromatic hydrocarbon group, or the like, p, q, and r are the same or different, and each represent an integer of 1 or 2, and at least one of Ar1 to Ar3 is a substituted or unsubstituted benzoxazolyl or other aromatic heterocyclic group.

公开(公告)号：US20240360358A1

公开(公告)日：2024-10-31

申请号：US18681888

申请日：2022-09-20

Applicant: HODOGAYA CHEMICAL CO., LTD.

Inventor： Kouki KASE ,  Eriko CHIBA ,  Byung-Sun YANG ,  Moon-Chan HWANG ,  Yuta HIRAYAMA ,  Shuichi HAYASHI

IPC: C09K11/06 ,  H10K50/11 ,  H10K85/60

CPC classification number: C09K11/06 ,  H10K50/11 ,  H10K85/6572 ,  C09K2211/1029

Abstract: It is an object of the present invention to provide a compound that has a high refractive index and a low extinction coefficient in a wavelength range of 450 to 750 nm, which is favorably used as a material for a capping layer of an organic EL element. Also, it is another object of the present invention to provide an organic EL element whose light extraction efficiency has been improved by using the compound. The present invention is directed to a compound represented by a general formula (1) or (2) below:




where A represents a substituted or unsubstituted aromatic hydrocarbon group or the like, B and C are optionally the same or different, and represent an unsubstituted naphthyl group, an unsubstituted quinolyl group, or the like, and each L is optionally the same or different, and represents a single bond, a substituted or unsubstituted divalent aromatic hydrocarbon group, or the like.