公开(公告)号：US20230209981A1

公开(公告)日：2023-06-29

申请号：US18178826

申请日：2023-03-06

申请人： Yungu (Gu'an) Technology Co., Ltd.

发明人： Yu GAO ,  Mengyu LIU ,  Zhi HUANG ,  Xiaowen WANG ,  Junzhe LIU ,  Jiaxin SUN

IPC分类号： H10K71/70 ,  H10K50/11

CPC分类号： H10K71/70 ,  H10K50/11 ,  H10K2101/40

摘要： A light-emitting device, a material screening method and a display panel. The light-emitting device of a first aspect of the present application includes a light-emitting layer including a host material and a guest material. When a carrier is injected into the light-emitting layer, there is a defect energy Et between the host material and the guest material, and an absolute value of the defect energy Et is greater than or equal to 0.03 eV. A light-emitting efficiency of the light-emitting device in a high-luminance state is improved and an operating voltage of the light-emitting device is reduced, which can ensure a display quality of the display panel in the high-luminance state and reduce an overall power consumption of the display panel.