公开(公告)号：US20220209159A1

公开(公告)日：2022-06-30

申请号：US17549660

申请日：2021-12-13

Applicant: LG DISPLAY CO., LTD.

Inventor： Wook SONG ,  Yu Jeong LEE

IPC: H01L51/50

Abstract: An organic light-emitting diode and a display device using the same are provided. An organic light-emitting diode includes: a hole injection layer, a hole transport layer on the hole injection layer, a first emission layer configured to generate light of a short wavelength in a visible band, the first emission layer being on the hole transport layer, wherein one or more of the hole injection layer and the hole transport layer includes a phosphorescent dopant material at an interface between the hole injection layer and the hole transport layer.

公开(公告)号：US20250143065A1

公开(公告)日：2025-05-01

申请号：US18882158

申请日：2024-09-11

Applicant: LG Display Co., Ltd.

Inventor： Yu Jeong LEE ,  Chun Ki KIM

IPC: H10K50/12 ,  H10K50/19 ,  H10K101/40 ,  H10K102/00

Abstract: A display apparatus including a light-emitting device is discussed. The light-emitting device can include a light-emitting unit between an anode electrode and a cathode electrode. The light-emitting unit can include at least one blue emission stack. The blue emission stack can include a first light-emitting layer and a second light-emitting layer contacting a surface of the first light-emitting layer toward the cathode electrode. A host of the second light-emitting layer can have a higher triplet energy level than a host of the first light-emitting layer. Thus, in the display apparatus, deterioration in the efficiency and life-span of the light-emitting device due to the accumulation of triplet excitons can be prevented or minimized. As a result, low power driving is possible, and power consumption is reduced.

公开(公告)号：US20230217824A1

公开(公告)日：2023-07-06

申请号：US18148271

申请日：2022-12-29

Applicant: LG Display Co., Ltd.

Inventor： Chun Ki KIM ,  Yu Jeong LEE ,  Jung Keun KIM

IPC: H10K85/60 ,  C09K11/06 ,  H10K85/30

CPC classification number: H10K85/6572 ,  C09K11/06 ,  H10K85/654 ,  H10K85/624 ,  H10K85/6574 ,  H10K85/322 ,  H10K50/11

Abstract: Disclosed are a light emitting device that includes an additional layer adjacent to a light emitting layer and thus is capable of utilizing, in light emission, holes not used in the light emitting layer, to improve efficiency and lifespan, and a light emitting display device including the same. The light emitting device includes a first electrode and a second electrode facing each other, and an unit comprising a hole transport layer, a light emitting layer, an efficiency-improving layer, and an electron transport layer sequentially stacked between the first electrode and the second electrode, wherein the light emitting layer includes a first host comprising an anthracene derivative and a first blue light emitting dopant, and the efficiency-improving layer includes a second host having bipolarity and a second blue light emitting dopant.

公开(公告)号：US20220209138A1

公开(公告)日：2022-06-30

申请号：US17546396

申请日：2021-12-09

Applicant: LG Display Co., Ltd.

Inventor： Yu Jeong LEE ,  Wook SONG

IPC: H01L51/00

Abstract: A white organic light-emitting device including a first electrode, a second electrode, the second electrode and the first electrode facing each other, a blue light-emitting stack, a phosphorescent light-emitting stack including a hole transport layer, an electron transport layer, a red light-emitting layer, and a green light-emitting layer that includes a hole-transporting host, an electron-transporting host, a first dopant having a green emission peak, and a non-emissive second dopant, where the blue light-emitting stack and the phosphorescent light-emitting stack are between the first electrode and the second electrode, and a charge generation layer interposed between the blue light-emitting stack and the phosphorescent light-emitting stack.