公开(公告)号：US20240334729A1

公开(公告)日：2024-10-03

申请号：US18491154

申请日：2023-10-20

Applicant: Samsung Display Co., Ltd.

Inventor： Jiyoung Lee ,  Makoto Yamamoto ,  Tsuyoshi Naijo ,  Toshiyuki Matsuura ,  Sungsoo Bae ,  Hojung Syn ,  Hyosup Shin ,  Heechoon Ahn ,  Changwoong Chu

IPC: H10K50/135 ,  H10K50/155 ,  H10K50/16 ,  H10K85/30 ,  H10K85/40 ,  H10K85/60

CPC classification number: H10K50/135 ,  H10K50/155 ,  H10K50/16 ,  H10K85/346 ,  H10K85/40 ,  H10K85/631 ,  H10K85/654 ,  H10K85/6572 ,  H10K85/658 ,  H10K2101/25

Abstract: A light-emitting device includes a first electrode, a second electrode facing the first electrode, and an interlayer between the first electrode and the second electrode and including an emission layer, wherein the emission layer includes a first compound, a second compound, a transition metal-containing compound, and a delayed fluorescence compound, the first compound being a hole transport material, and the second compound being an electron transport material, the first compound and the second compound form an exciplex, the first compound, the second compound, or any combination thereof is substituted with at least one deuterium, and an absolute value of a triplet charge transfer state-singlet ground state non-radiative decay rate constant of a mixture of the first compound and the second compound is decreased, compared to a case in which the first compound, the second compound, or any combination thereof is not substituted with deuterium.

公开(公告)号：US20240298457A1

公开(公告)日：2024-09-05

申请号：US18465294

申请日：2023-09-12

Applicant: Samsung Display Co., Ltd.

Inventor： Sungsoo Bae ,  Tsuyoshi Naijo ,  Hojung Syn ,  Hyosup Shin ,  Jiyoung Lee ,  Changwoong Chu

IPC: H10K50/12 ,  H10K50/15 ,  H10K50/18 ,  H10K85/30

CPC classification number: H10K50/12 ,  H10K50/15 ,  H10K50/181 ,  H10K85/342 ,  H10K85/346

Abstract: Embodiments provide a light-emitting device that include a first electrode, a second electrode facing the first electrode, and an interlayer between the first electrode and the second electrode. The interlayer includes an emission layer, and the emission layer includes a first emission layer and a second emission layer. The first emission layer includes a first host and a first-first dopant, or a first host, a first-first dopant, and a first-second dopant. The second emission layer includes a second host and a second-first dopant, or a second host, a second-first dopant, and a second-second dopant. The emission layer includes the first-second dopant and/or the second-second dopant, the first emission layer and the second emission layer directly contact each other, and a thickness of the second emission layer is greater than a thickness of the first emission layer.

公开(公告)号：US11527725B2

公开(公告)日：2022-12-13

申请号：US16859894

申请日：2020-04-27

Applicant: Samsung Display Co., Ltd.

Inventor： Hyojeong Kim ,  Minje Kim ,  Eungdo Kim ,  Hyunyoung Kim ,  Hyosup Shin ,  Seokgyu Yoon ,  Youngki Lee ,  Jungsub Lee ,  Jiyoung Lee ,  Hyejin Jung ,  Kunwook Cho ,  Hyeongu Cho ,  Minsoo Choi ,  Youngeun Choi ,  Jaejin Lyu

IPC: H01L51/50 ,  H01L51/00 ,  C09K11/06

Abstract: An organic light-emitting device having improved efficiency and lifespan includes: a first electrode, a second electrode, and an organic layer between the first electrode and the second electrode, wherein the organic layer includes an emission layer, the emission layer includes a first compound, a second compound, a third compound, and a fourth compound, the first compound, the second compound, the third compound, and the fourth compound are different from each other, the third compound includes a metal element having an atomic number of 40 or more, the fourth compound includes boron (B), the third compound and the fourth compound each satisfy Conditions 1-1 and 1-2 below, and the fourth compound satisfies Condition 2 or 3: T1(C3)onset≥S1(C4)onset  Condition 1-1 T1(C3)max≥S1(C4)max  Condition 1-2 KRISC(C4)≥103S−1  Condition 2 f(C4)≥0.1.  Condition 3