公开(公告)号：US20230096510A1

公开(公告)日：2023-03-30

申请号：US17789683

申请日：2021-09-01

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Haiyan SUN ,  Xiaojin ZHANG

IPC: H01L51/50 ,  H01L51/00

Abstract: The embodiments of the present disclosure provide a light-emitting device and a display substrate, which belong to the technical field of organic light-emitting diodes. The light-emitting device of the present disclosure comprises: a first light-emitting layer comprising a first host material and a first guest material; and a second light-emitting layer comprising a second host material and a second guest material; S1(h1)>S1(g1), T1(h1)>T1(g1), S1(g1)−T1(g1)≤0.1 eV; S1(h2)>S1(g2), T1(h2)>T1(g2), S1(g2)−T1(g2)≤0.1 eV; S1(h1)≥S1(h2)>S1(g1)>S1(g2), T1(h1)≥T1(h2)>T1(g1)>T1(g2); the second guest material is a TADF material; at least 40% of the area in a region covered under the emission spectrum of the first light-emitting layer overlaps with the region covered under the absorption spectrum of the second light-emitting 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：US20220131101A1

公开(公告)日：2022-04-28

申请号：US17509788

申请日：2021-10-25

Applicant: Chengdu BOE Optoelectronics Technology Co., Ltd. ,  BOE Technology Group Co., Ltd.

Inventor： Huiyun YANG ,  Xiaojin ZHANG ,  Haiyan SUN

IPC: H01L51/50 ,  H01L51/56

Abstract: Provided is an organic light emitting device, including a p-type host layer, an n-type host layer, and an interlayer disposed between the p-type host layer and the n-type host layer, wherein at least one of the p-type host layer and the n-type host layer includes a fluorescent dopant, and a preset distance is present between the fluorescent dopant and the interlayer; the p-type host layer and the n-type host layer are configured to form, together with the interlayer, a spatially separated exciplex under an action of driving voltage; and the fluorescent dopant is configured to absorb energy of singlet excitons generated by the exciplex to emit light.

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.

公开(公告)号：US20210391552A1

公开(公告)日：2021-12-16

申请号：US17344809

申请日：2021-06-10

Applicant: BOE Technology Group Co., Ltd.

Inventor： Xinghua LIU ,  Xiaojin ZHANG ,  Haiyan SUN

IPC: H01L51/50

Abstract: Organic luminescent material, includes: host material, TADF sensitizer, and fluorescent-luminescent material; wherein absolute value of difference between LUMO level of the host material and LUMO level of the TADF sensitizer is not more than 0.4 eV, and absolute-value of difference between HOMO level of the host material and HOMO level of the TADF sensitizer is not more than 0.4 eV; absolute-value of LUMO level of the fluorescent-luminescent material is not more than absolute-value of the LUMO level of the host material and the LUMO level of the TADF sensitizer, and/or absolute-value of HOMO level of the fluorescent-luminescent material is not less than an absolute-value of the HOMO level of the host material and absolute-value of the HOMO level of the TADF sensitizer; and emission-spectrum of the host material overlaps an absorption-spectrum of the TADF sensitizer, and emission-spectrum of the TADF sensitizer overlaps absorption-spectrum of the fluorescent-luminescent material.

公开(公告)号：US20210151524A1

公开(公告)日：2021-05-20

申请号：US16642580

申请日：2018-03-18

Applicant: CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD. ,  BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Guoqiang TANG ,  Xiaojin ZHANG ,  Guoqiang MA

IPC: H01L27/32 ,  H01L51/50 ,  H01L27/30 ,  G06K9/00 ,  G06F3/042

Abstract: A display panel and a manufacturing method thereof are disclosed. The display panel includes: a base substrate; a first sub-pixel disposed on the base substrate and including a first light-emitting device configured to emit visible light for display operation; a second a light-emitting device overlapped with the first light-emitting device in a direction perpendicular to the base substrate and configured to emit infrared light; and a first photosensitive device disposed on the base substrate and configured to sense light obtained after the infrared light is reflected.

公开(公告)号：US20190131561A1

公开(公告)日：2019-05-02

申请号：US16054550

申请日：2018-08-03

Applicant: BOE TECHNOLOGY GROUP CO., LTD. ,  ORDOS YUANSHENG OPTOELECTRONICS CO., LTD.

Inventor： Xiaojin ZHANG ,  Lei CHEN ,  Dini XIE ,  Dan WANG

IPC: H01L51/52 ,  H01L51/56 ,  G02B5/30 ,  H01L27/32

Abstract: The present disclosure provides an organic light emitting diode (OLED) device and a method for manufacturing the same, an OLED display substrate and an OLED display device. The OLED device of the present disclosure comprises a substrate, and a first electrode, a light emitting layer and a second electrode arranged on the substrate, wherein the light emitting layer comprises fibers of p-phenylene based polymer as a host material, and the fibers of p-phenylene based polymer are arranged in a first orientation; and wherein the light emitted by the fibers of p-phenylene based polymer arranged in the first orientation is linearly polarized light in a first direction. The OLED device of the present disclosure can simultaneously ensure a good contrast, brightness and light transmittance.

公开(公告)号：US20170263734A1

公开(公告)日：2017-09-14

申请号：US15107094

申请日：2015-09-15

Applicant: BOE TECHNOLOGY GROUP CO., LTD

Inventor： Dini XIE ,  Meili WANG ,  Xianbin XU ,  Liangchen YAN ,  Xiaojin ZHANG

IPC: H01L29/66 ,  H01L27/12 ,  H01L21/473 ,  H01L29/24 ,  H01L29/786 ,  H01L21/02

CPC classification number: H01L29/78696 ,  H01L21/02565 ,  H01L21/02631 ,  H01L21/473 ,  H01L27/1225 ,  H01L29/24 ,  H01L29/66969 ,  H01L29/78618 ,  H01L29/78648 ,  H01L29/7869

Abstract: The present disclosure provides a thin film transistor array substrate and a fabrication method thereof, and a display device. The thin film transistor array substrate includes an active layer. The active layer is formed using a zinc target under an environment of oxygen and nitrogen in a sputtering chamber. A source/drain buffer layer is formed on the active layer using the zinc target by a sputtering process in the sputtering chamber under an environment containing one of oxygen and nitrogen.