公开(公告)号：US20220310931A1

公开(公告)日：2022-09-29

申请号：US17519722

申请日：2021-11-05

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Shu JING ,  Xiaobo DU ,  Zhihui ZHANG

IPC: H01L51/00

Abstract: An organic light-emitting device, a manufacturing method and a display device are provided. The organic light-emitting device includes: a first electrode and a second electrode that are arranged oppositely; at least two light-emitting layers located between the first electrode and the second electrode, the at least two light-emitting layers include a first light-emitting layer and a second light-emitting layer that are stacked alternately. The first light-emitting layer is a blue light-emitting layer, the first light-emitting layer is doped with a first dopant material, and the second light-emitting layer is doped with a second dopant material. The first dopant material includes a blue light-emitting material with triplet-triplet annihilation effect, and the triplet energy level of the first dopant material is higher than the triplet energy level of the second dopant material.

公开(公告)号：US20250081718A1

公开(公告)日：2025-03-06

申请号：US18282849

申请日：2023-01-16

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Xiaobo DU ,  Yansong LI ,  Erli LI ,  Shu JING ,  Yonghong CHEN ,  Mingli LIU

IPC: H10K50/12 ,  H10K50/15 ,  H10K50/16 ,  H10K50/17 ,  H10K101/00 ,  H10K101/10 ,  H10K101/25 ,  H10K102/00

Abstract: The present disclosure provides a light emitting device and a display panel, which belong to the field of display technology. The light emitting device includes a first electrode, a second electrode, and at least one light emitting unit between the first electrode and the second electrode; the at least one light emitting unit each at least includes a light emitting layer; the light emitting layer includes a host material, a phosphorescent guest material and a fluorescent guest material which are doped together; a lowest triplet energy level of at least one material in the host material is greater than a lowest triplet energy level of the phosphorescent guest material.

公开(公告)号：US20240057363A1

公开(公告)日：2024-02-15

申请号：US17638195

申请日：2021-04-26

Applicant: BOE Technology Group Co., Ltd.

Inventor： Zhihui ZHANG ,  Yan FAN ,  Xing FAN ,  Shu JING ,  Huameng LIU ,  Kuo SHEN

IPC: H10K50/11 ,  H10K71/12 ,  H10K50/16 ,  H10K50/858

CPC classification number: H10K50/11 ,  H10K71/12 ,  H10K50/16 ,  H10K50/858 ,  H10K2101/90

Abstract: An organic light emitting device, a preparation method therefor, and a display apparatus are provided. The organic light emitting device includes an anode, a cathode, and a light emitting layer and an electron transport layer arranged between the anode and the cathode. The electron transport layer is arranged between the light emitting layer and the cathode. The electron transport layer includes a first host material and a second host material. A mixing ratio of the first host material to the second host material of one side of the electron transport layer close to the light emitting layer is different from a mixing ratio of the first host material to the second host material of one side of the electron transport layer away from the light emitting layer.

公开(公告)号：US20230276675A1

公开(公告)日：2023-08-31

申请号：US18024147

申请日：2021-10-22

Applicant: BOE Technology Group Co., Ltd.

Inventor： Shu JING

IPC: H10K59/35 ,  H10K59/80 ,  C23C14/04 ,  C23C14/08 ,  C23C14/12

CPC classification number: H10K59/353 ,  H10K59/879 ,  H10K59/352 ,  C23C14/042 ,  C23C14/08 ,  C23C14/12

Abstract: The display substrate includes: a base substrate including sub-pixel regions with opening regions and non-opening regions; light-emitting devices each including a first electrode, a light-emitting layer and a second electrode; a first light extraction layer between a light-emitting layer and a second electrode; and a second light extraction layer on the side of the second electrode away from the first light extraction layer. The first light extraction layer is provided in at least part of a non-opening region, and the refractive index of the first light extraction layer is greater than the refractive index of the second electrode. An orthographic projection of the second light extraction layer on the base substrate completely covers an orthographic projection of the first light extraction layer on the base substrate, and the refractive index of the second light extraction layer is greater than the refractive index of the second electrode.

公开(公告)号：US20220069247A1

公开(公告)日：2022-03-03

申请号：US17412460

申请日：2021-08-26

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Shu JING ,  Xiaobo DU

IPC: H01L51/50 ,  H01L51/56 ,  H01L51/52

Abstract: The present disclosure provides a light emitting device including: a first electrode; a first light emitting layer on a side of the first electrode; an N-type charge generation layer on a side of the first light emitting layer distal to the first electrode; a P-type charge generation layer on a side of the N-type charge generation layer distal to the first light emitting layer; a second light emitting layer on a side of the P-type charge generation layer distal to the N-type charge generation layer; and a second electrode on a side of the second light emitting layer distal to the P-type charge generation layer. The N-type charge generation layer includes a host material which has a lowest unoccupied molecular orbital energy level less than or equal to −2.9 and a glass transition temperature greater than 130° C.