公开(公告)号：US12127477B2

公开(公告)日：2024-10-22

申请号：US17329903

申请日：2021-05-25

Applicant: Samsung Display Co., Ltd.

Inventor： Jiyoung Song ,  Seulong Kim ,  Pilgu Kang ,  Eungyoung Park ,  Hajin Song ,  Hyekyun Lee ,  Soonchul Chang ,  Dongseob Jeong ,  Yangjin Cho ,  Jina Hur

IPC: H01L51/00 ,  H10K85/30 ,  H10K85/40 ,  H10K85/60 ,  H10K50/11 ,  H10K50/115 ,  H10K50/15 ,  H10K50/16 ,  H10K50/17 ,  H10K50/18 ,  H10K101/10

CPC classification number: H10K85/654 ,  H10K85/342 ,  H10K85/346 ,  H10K85/40 ,  H10K85/622 ,  H10K85/623 ,  H10K85/624 ,  H10K85/633 ,  H10K85/636 ,  H10K85/6572 ,  H10K85/6574 ,  H10K85/6576 ,  H10K50/11 ,  H10K50/115 ,  H10K50/15 ,  H10K50/16 ,  H10K50/171 ,  H10K50/18 ,  H10K2101/10

Abstract: An organic light-emitting device includes: a first electrode; a second electrode facing the first electrode; an emission region between the first electrode and the second electrode and including a first emission layer and a second emission layer; and a hole blocking layer between the first emission layer and the first electrode, or between the second emission layer and the second electrode, wherein the second emission layer may be between the first emission layer and the hole blocking layer, the first emission layer may include a first host and a first light-emitting material, the second emission layer may include a second host and a second light-emitting material, and the first light-emitting material and the second light-emitting material may respectively be included in the first emission layer and the second emission layer at an identical ratio.

公开(公告)号：US20230165022A1

公开(公告)日：2023-05-25

申请号：US18058397

申请日：2022-11-23

Applicant: Samsung Display Co., Ltd.

Inventor： Seulong Kim ,  Hajin Song ,  Hyoungcheol Lim ,  Yangjin Cho ,  Jaehoon Hwang

IPC: H01L51/50 ,  H01L51/00

CPC classification number: H01L51/5004 ,  H01L51/0094 ,  H01L51/0073 ,  H01L51/0058 ,  H01L51/504 ,  H01L2251/5384

Abstract: In a light-emitting device, an emission layer includes a first emission layer and a second emission layer, the first emission layer includes a first host, the second emission layer includes a second host and a third host, and a hole mobility of the first host (μH1), a hole mobility of the second host (μH2), and a hole mobility of the third host (μH3) satisfy Expressions (1) and (2) below:


μH1>μH2  (1)



μH1>μH3  (2).