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：US20250098403A1

公开(公告)日：2025-03-20

申请号：US18577163

申请日：2023-03-29

Applicant: BOE Technology Group Co., Ltd.

Inventor： Pengfei ZUO ,  Guanyin WEN ,  Yanjun HAO ,  Hui ZHOU ,  Qixiao WU ,  Huameng LIU

IPC: H10K50/19 ,  H10K50/13 ,  H10K59/12 ,  H10K59/122 ,  H10K102/00

Abstract: A display panel, including a substrate, and a first electrode, at least two emission functional layers and a second electrode sequentially stacked on a side of the substrate, where for any two adjacent emission functional layers, one close to the substrate includes a first hole transport layer, a first emission layer, a first electron transport layer, and an N-type charge generation layer sequentially stacked away from the substrate, and the other away from the substrate includes a P-type charge generation layer, a second hole transport layer, a second emission layer, and a second electron transport layer sequentially stacked away from the N-type charge generation layer; the first electron transport layer has a thickness ranging from 3 nm to 10 nm; the first electron transport layer includes first, second and third subportions; and the first subportion has a thickness smaller than those of the second and third subportions.

公开(公告)号：US20220238826A1

公开(公告)日：2022-07-28

申请号：US17483574

申请日：2021-09-23

Applicant: BOE Technology Group Co., Ltd.

Inventor： Huameng LIU ,  Haidong WU ,  Bei WANG ,  Xiaobo DU

IPC: H01L51/50 ,  H01L27/32 ,  G09G3/3208

Abstract: Disclosed are a light-emitting device, a display panel, and a driving method of the light-emitting device. The light-emitting device includes: a base substrate, a first electrode on a side of the base substrate, a second electrode on a side, facing away from the base substrate, of the first electrode, and at least two blue light-emitting layers located between the first electrode and the second electrode. Different blue light-emitting layers emit light with different wavelengths. The first electrode and the second electrode are configured to be applied with different voltages. A voltage difference between the first electrode and the second electrode includes a first threshold voltage and a second threshold voltage, and under control of the first threshold voltage, one of the blue light-emitting layers emits light; and under control of the second threshold voltage, another blue light-emitting layer emits light.