公开(公告)号：US20210202844A1

公开(公告)日：2021-07-01

申请号：US16935004

申请日：2020-07-21

Applicant: Samsung Display Co., Ltd.

Inventor： Jaeweon HUR ,  Kyungsik KIM ,  Sungwook KIM ,  Seulong KIM ,  Seungjin CHU ,  Hyein JEONG

IPC: H01L51/00 ,  C07C211/58 ,  C09K11/06 ,  C07C211/61 ,  C07D209/88 ,  C07F7/08

Abstract: An organic light-emitting device in which a hole transport region includes a first hole transport stack, a second hole transport stack between the first hole transport stack and an emission layer, and an electron blocking layer between the second hole transport stack and the emission layer, wherein a HOMO energy level of the hole transport region satisfies a certain equations. The organic light-emitting devices according to embodiments of the present disclosure may have high efficiency and a long lifespan.

公开(公告)号：US20210184152A1

公开(公告)日：2021-06-17

申请号：US16996599

申请日：2020-08-18

Applicant: Samsung Display Co., Ltd.

Inventor： Seungjin CHU ,  Kyungsik KIM ,  Sungwook KIM ,  Seulong KIM ,  Tsuyoshi NAIJO ,  Yunjee PARK ,  Sungsoo BAE ,  Dongchan LEE ,  Hyewon CHOI ,  Jaeweon HUR

IPC: H01L51/50 ,  H01L51/00

Abstract: An organic light-emitting device includes a mixed layer, an emission layer, and a buffer layer and satisfies one of Equation 1 or Equation 2 and Equation 3: T1(D)≥T1(Mix)+0.3 eV  Equation 1 T1(H)≥T1(Mix)+0.3 eV  Equation 2 T1(Mix)

公开(公告)号：US20210074918A1

公开(公告)日：2021-03-11

申请号：US16996543

申请日：2020-08-18

Applicant: Samsung Display Co., Ltd.

Inventor： Seulong KIM ,  Kyungsik KIM ,  Sungwook KIM ,  Seungjin CHU ,  Jaeweon HUR

IPC: H01L51/00

Abstract: An organic light-emitting device includes: a first electrode; a second electrode facing the first electrode; an organic layer between the first electrode and the second electrode and comprising an emission layer; and an electron transport region between the emission layer and the second electrode, wherein the electron transport region comprises a first auxiliary layer and a second auxiliary layer, the first auxiliary layer is between the emission layer and the second auxiliary layer, the first auxiliary layer comprises a first compound, the second auxiliary layer comprises a second compound, the second compound comprises at least one 7 electron-depleted nitrogen-containing ring, and the organic light-emitting device satisfies equations: T1(EML)≥T1(AXL1)+0.3 eV and T1(AXL2)≥T1(AXL1)+0.5 eV.