公开(公告)号：US20220310920A1

公开(公告)日：2022-09-29

申请号：US17419306

申请日：2020-09-28

Applicant: BOE Technology Group Co., Ltd.

Inventor： Haiyan SUN ,  Meishan XU ,  Dan WANG ,  Changho LEE

IPC: H01L51/00

Abstract: An organic light emitting device and a display apparatus are provided. The organic light emitting device includes an anode, a cathode and a light-emitting layer arranged between the anode and the cathode, wherein a doped structure layer is arranged between the anode and the light-emitting layer, the doped structure layer comprises a host material and a guest material doped in the host material, and the host material and the guest material satisfy: −1.5eV

公开(公告)号：US20240373714A1

公开(公告)日：2024-11-07

申请号：US18777935

申请日：2024-07-19

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Haiyan SUN ,  Meishan XU ,  Xiaojin ZHANG ,  Changho LEE ,  Dan WANG

IPC: H10K59/35 ,  H10K50/11 ,  H10K50/15 ,  H10K50/16 ,  H10K50/17 ,  H10K59/122 ,  H10K101/40

Abstract: The present disclosure provides a display substrate and a display panel. The display substrate comprises: a base substrate, a first electrode layer, a first light-emitting layer, a first common connection layer, a second light-emitting layer, a third light-emitting layer, and a second electrode layer. The first electrode layer is provided on a side of the base substrate; the first light-emitting layer is provided on a side of the first electrode layer away from the base substrate; the first common connection layer is provided on a side of the first light-emitting layer away from the first electrode layer, and comprises a plurality of first sub-common connection layers; each second sub-light-emitting layer of the second light-emitting layer is provided on a side of each first sub-common connection layer away from the first light-emitting layer in one-to-one correspondence.

公开(公告)号：US20220310955A1

公开(公告)日：2022-09-29

申请号：US17419307

申请日：2020-09-28

Applicant: BOE Technology Group Co., Ltd.

Inventor： Meishan XU ,  Haiyan SUN ,  Dan WANG ,  Changho LEE

IPC: H01L51/50 ,  H01L51/00

Abstract: An organic light emitting device and a display apparatus are provided. The organic light emitting device includes an anode, a cathode and a light-emitting layer arranged between the anode and the cathode, wherein a first hole injection layer and a second hole injection layer are arranged between the anode and the light-emitting layer. The first hole injection layer and the second hole injection layer are different in structure, including one or more of the following: the first hole injection layer and the second hole injection layer are different in thickness, different in material structure, different in quantity of the material and number of types of the material, and different in energy level of the material.

公开(公告)号：US20240188318A1

公开(公告)日：2024-06-06

申请号：US17600278

申请日：2020-11-30

Applicant: BOE Technology Group Co., Ltd.

Inventor： Xiaojin ZHANG ,  Huiyun YANG ,  Changho LEE

IPC: H10K50/12 ,  H10K101/20 ,  H10K101/30

CPC classification number: H10K50/121 ,  H10K2101/20 ,  H10K2101/30

Abstract: The disclosure relates to an organic light emitting diode, a method for manufacturing the same, and a display panel. The organic light emitting diode includes: a first electrode; a second electrode disposed opposite to the first electrode; a light-emitting layer between the first electrode and the second electrode; the light-emitting layer includes a first light-emitting sub-layer and a second light-emitting sub-layer; the first light-emitting sub-layer includes a host material, a TADF sensitizer and a fluorescent guest material; the second light-emitting sub-layer includes the host material or includes the host material and the TADF sensitizer. The light-emitting layer of the organic light emitting diode of the present disclosure includes the first light-emitting sub-laver and the second light-emitting sub-layer, and thus the luminous efficiency of the red light-emitting device, the green light-emitting device, and the blue light-emitting device can be harmonized by effectively adjusting a thickness of the second light-emitting sub-layer.

公开(公告)号：US20220328782A1

公开(公告)日：2022-10-13

申请号：US17614745

申请日：2020-10-15

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Xiaojin ZHANG ,  Xinghua LIU ,  Huiyun YANG ,  Changho LEE

IPC: H01L51/50 ,  H01L51/56 ,  H01L51/00

Abstract: A light-emitting device includes a first light-emitting layer and a second light-emitting layer that are stacked. A material of the first light-emitting layer includes a first host material and a first TADF sensitizer. A material of the second light-emitting layer includes a second host material, a second TADF sensitizer, and a second fluorescent emissive material. Transmission rates of the material of the first light-emitting layer and the material of the second light-emitting layer to holes are greater than transmission rates of the material of the first light-emitting layer and the material of the second light-emitting layer to electrons, and there is a first overlapping region between a normalized electroluminescence spectrum of the first TADF sensitizer and a normalized absorption spectrum of the second fluorescent emissive material.

公开(公告)号：US20220190272A1

公开(公告)日：2022-06-16

申请号：US17260563

申请日：2020-04-09

Applicant: BOE Technology Group Co., Ltd.

Inventor： Haiyan SUN ,  Meishan XU ,  Xiaojin ZHANG ,  Changho LEE ,  Dan WANG

IPC: H01L51/50 ,  H01L27/32

Abstract: An OLED display substrate includes a base substrate with a display region arranged thereon. First, second and third sub-pixels are arranged in the display region. A first electrode layer, a pixel defining layer, a second electrode layer, and organic functional layers are arranged in the display region. The organic functional layers include first, second and third light-emitting layers. The first light-emitting layer covers the display region and is an integral structure. The second and third light-emitting layers are arranged on a side of the first light-emitting layer towards the second electrode layer. An orthographic projection of each sub light-emitting layer of the second and third light-emitting layers on the base substrate completely covers an orthographic projection of an opening of the pixel defining layer on the base substrate, and does not overlap with orthographic projections of other openings of the pixel defining layer on the base substrate.

公开(公告)号：US20220115460A1

公开(公告)日：2022-04-14

申请号：US17262192

申请日：2020-04-09

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Haiyan SUN ,  Meishan XU ,  Xiaojin ZHANG ,  Changho LEE ,  Dan WANG

IPC: H01L27/32 ,  H01L51/50

Abstract: The present disclosure provides a display substrate and a display panel. The display substrate comprises: a base substrate, a first electrode layer, a first light-emitting layer, a first common connection layer, a second light-emitting layer, a third light-emitting layer, and a second electrode layer. The first electrode layer is provided on a side of the base substrate; the first light-emitting layer is provided on a side of the first electrode layer away from the base substrate; the first common connection layer is provided on a side of the first light-emitting layer away from the first electrode layer, and comprises a plurality of first sub-common connection layers; each second sub-light-emitting layer of the second light-emitting layer is provided on a side of each first sub-common connection layer away from the first light-emitting layer in one-to-one correspondence.