公开(公告)号：US20240172470A1

公开(公告)日：2024-05-23

申请号：US18455262

申请日：2023-08-24

Applicant: Samsung Display Co., Ltd.

Inventor： JAEWEON HUR ,  HEEJOO KO ,  JIN-WON SUN ,  YOOJIN SOHN ,  EUNHYE SONG ,  PYUNGEUN JEON ,  CHANGWOONG CHU

IPC: H10K50/16 ,  H10K85/60

CPC classification number: H10K50/166 ,  H10K85/615 ,  H10K85/654 ,  H10K85/6572

Abstract: A light emitting device includes a first electrode, a hole transport region located at (e.g., on), the first electrode, a light emitting layer located at (e.g., on), the hole transport region, an electron transport region located at (e.g., on), the light emitting layer, and a second electrode located at (e.g., on), the electron transport region. The electron transport region includes a mixed layer in which a first compound represented by Formula 1 and a second compound different from the first compound and represented by Formula 2 are mixed. The mixed layer is configured so that the light emitting efficiency and device lifespan of the light emitting device may be enhanced or improved.