公开(公告)号：US20240407187A1

公开(公告)日：2024-12-05

申请号：US18268610

申请日：2022-04-21

Applicant: BOE Technology Group Co., Ltd.

Inventor： Haiyan SUN ,  Xiaojin ZHANG ,  Dan WANG ,  Siqi WANG

IPC: H10K50/12 ,  H10K101/00 ,  H10K101/30

Abstract: The disclosure provides an organic light-emitting device and a display device, which belong to the field of display technology. The organic light-emitting device includes a light-emitting layer (600), including a first host material, a second host material, at least one auxiliary material, and at least one dopant material; the first host material and the second host material form a first composite transport material; the auxiliary material and the second host material form the second composite transport material; S1(A)>S1(CH)>S1(C); T1(A)>T1(CH)>T1(C); S1(A) is the lowest singlet state energy of the host material, S1(CH) is the lowest singlet state energy of the composite transport material, S1(C) is the lowest singlet state energy of the dopant material; T1(A) is the lowest triplet state energy of the host material, T1(CH) is the lowest triplet state energy of the composite transport material, and T1(C) is the lowest triplet state energy of the dopant material.

公开(公告)号：US20240206296A1

公开(公告)日：2024-06-20

申请号：US17794628

申请日：2021-08-30

Applicant: BOE Technology Group Co., Ltd.

Inventor： Xiaojin ZHANG ,  Siqi WANG ,  Haiyan SUN

IPC: H10K59/80 ,  H10K59/50 ,  H10K85/10 ,  H10K102/00

CPC classification number: H10K59/8791 ,  H10K59/50 ,  H10K59/879 ,  H10K85/111 ,  H10K2102/351

Abstract: A display substrate includes a light emitting element disposed on a base substrate, and a light dimming structure layer and an anti-reflection layer stacked sequentially at a light exiting side of the light emitting element, wherein the light dimming structure layer includes a polarizing film layer configured to convert at least a portion of light emitted by the light emitting element incident onto the polarizing film layer into circularly polarized light with a set rotational direction to pass through the polarizing film layer; the anti-reflection layer includes a phase retarder and a linear polarizer which are stacked sequentially along a direction away from the base substrate, the phase retarder being configured to convert the circularly polarized light passing through the polarizing film layer into linearly polarized light, a polarization direction of which is parallel to a direction of a light transmission axis of the linear polarizer.

公开(公告)号：US20230043738A1

公开(公告)日：2023-02-09

申请号：US17787471

申请日：2021-08-04

Applicant: BOE Technology Group Co., Ltd.

Inventor： Yong WU ,  Siqi WANG ,  Rongrong GAO

IPC: H01L51/50

Abstract: The present invention provides an organic electroluminescent device, a display panel, and a display apparatus. A light-emitting layer comprises a first compound, a second compound, a third compound, and a fourth compound; the first compound and the second compound form a first exciplex under optical excitation and electric excitation; excitonic energy compounded by the first exciplex can be transferred to the third compound; then the third compound and the second compound are compounded to form a second exciplex; and excitonic energy compounded by the second exciplex can be transferred to the fourth compound. In the excitonic energy transfer process, triplet excitons improve a reverse intersystem crossing process and are converted into singlet excitons to radiate and emit fluorescence when an exciplex is formed by means of compounding; the singlet excitons are effectively used for Forster energy transfer, and Dexter energy transfer is inhibited, such that energy loss is avoided, the excitonic energy is effectively used, and the device efficiency is improved.

公开(公告)号：US20220059776A1

公开(公告)日：2022-02-24

申请号：US17355351

申请日：2021-06-23

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Siqi WANG

IPC: H01L51/00 ,  C09K11/06 ,  C07D209/86 ,  C07D239/26 ,  C07D251/24 ,  C07F7/08

Abstract: The present disclosure provides a co-host material, a composition for forming a light emitting layer, and a light emitting device. The co-host material can at least partially solve the difficulty in the limited selection of thermally activated delayed fluorescent materials in the existing light emitting devices, and the difficulty in providing a light emitting layer of a blue light emitting device. The co-host material comprises a first compound and a second compound each having a specific general formula.

公开(公告)号：US20240206303A1

公开(公告)日：2024-06-20

申请号：US17794626

申请日：2021-08-30

Applicant: BOE Technology Group Co., Ltd.

Inventor： Haiyan SUN ,  Xiaojin ZHANG ,  Siqi WANG

IPC: H10K59/80 ,  H10K59/50 ,  H10K102/00

CPC classification number: H10K59/8793 ,  H10K59/50 ,  H10K59/873 ,  H10K59/879 ,  H10K2102/351

Abstract: A display substrate and a display device are provided. The display substrate includes a light emitting element disposed on a base substrate, and an encapsulation layer, a connection layer, a light extraction layer, a polarization conversion layer and a polarization layer stacked sequentially at a light exiting side of the light emitting element. The light extraction layer is configured to convert at least a portion of light emitted by the light emitting element incident onto the light extraction layer into circularly polarized light with a set rotational direction to pass through the light extraction layer. The polarization conversion layer is configured to convert the circularly polarized light passing through the light extraction layer into linearly polarized light, with a polarization direction parallel to a direction of a light transmission axis of the polarization layer; the connection layer is configured to bond the light extraction layer to the encapsulation layer.

公开(公告)号：US20240196708A1

公开(公告)日：2024-06-13

申请号：US17908095

申请日：2021-09-29

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Haiyan SUN ,  Xiaojin ZHANG ,  Siqi WANG ,  Dan WANG

IPC: H10K59/80 ,  H10K59/126 ,  H10K59/38 ,  H10K102/00

CPC classification number: H10K59/879 ,  H10K59/126 ,  H10K59/38 ,  H10K2102/351

Abstract: A light-emitting substrate includes a substrate, a plurality of sub-pixels, a first light extraction layer and a second light extraction layer. Each sub-pixel includes a light-emitting element and a light conversion pattern disposed on a light-exit side of the light-emitting element. The plurality of sub-pixels include at least one first sub-pixel. The first light extraction layer is disposed on a side of the first sub-pixel away from the light-emitting element, and at least located in a region where the at least one first sub-pixel is located. The first light extraction layer includes first transparent substrate(s) and optically active substances added in each first transparent substrate. The second light extraction layer is disposed on a side of the first light extraction layer away from the light-emitting element. A refractive index of the second light extraction layer is smaller than a refractive index of the first light extraction layer.

公开(公告)号：US20230018040A1

公开(公告)日：2023-01-19

申请号：US17631371

申请日：2020-12-15

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Bingyan LIANG ,  Siqi WANG ,  Dongxu ZHANG

IPC: H01L51/00 ,  C09K11/06

Abstract: A D-A type organic light-emitting material includes a donor moiety and an acceptor moiety. The donor moiety is represented as follows: L is selected from any of aryl, heteroaryl, fused aryl and fused heteroaryl. When L is selected from any of aryl and heteroaryl, aryl and heteroaryl each have one or more substituents each selected from any of deuterium, tert-butyl, phenyl, cyano and methylimino, and at least one substituent is selected from cyano and methylimino. When L is selected from any of fused aryl and fused heteroaryl, fused aryl and fused to heteroaryl each have or do not have a substituent. When fused aryl and fused heteroaryl each have a substituent, the substituent is selected from any of deuterium, tert-butyl, phenyl, cyano and methylimino. The acceptor moiety is selected from any of a substituted or unsubstituted fused aromatic rings and a substituted or unsubstituted fused heterocyclic ring.

公开(公告)号：US20220102648A1

公开(公告)日：2022-03-31

申请号：US17462859

申请日：2021-08-31

Applicant: BOE Technology Group Co., Ltd.

Inventor： Siqi WANG ,  Haiyan SUN ,  Xiaojin ZHANG

IPC: H01L51/00

Abstract: Organic light-emitting devices, display panels and display apparatuses are provided. An organic light-emitting device includes: a first electrode layer; a first light-emitting layer provided on the first electrode layer and including a first host material and a first guest material; a second light-emitting layer provided on the first light-emitting layer and including a second host material and a second guest material; and a second electrode layer provided on the second light-emitting layer. The first guest material has a general structural formula as indicated in Formula I. X is selected from carbon, nitrogen, oxygen, sulfur, or boron; Y is selected from nitrogen or boron, and Y is different from X; and R1 and R2 are selected from hydrogen, methyl, isopropyl, tert-butyl, substituted or unsubstituted aryl, substituted or unsubstituted alkyl aryl, or substituted or unsubstituted nitrogen-containing aryl, respectively.