公开(公告)号：US20220190273A1

公开(公告)日：2022-06-16

申请号：US17518551

申请日：2021-11-03

Applicant: Samsung Display Co., Ltd.

Inventor： Jongseok Han ,  lllsoo Park ,  Jaehong Kim ,  Hyomin Kim ,  Sijin Sung ,  Heeseong Jeong

IPC: H01L51/50 ,  H01L51/56

Abstract: A display apparatus includes a substrate, a first electrode on the substrate, a second electrode on the first electrode, an emission layer between the first electrode and the second electrode, and a hole transport layer located between the first electrode and the emission layer, and including a first mixed layer in which a first material and a second material different from the first material are mixed with each other, wherein an absolute value of a difference between a Highest Occupied Molecular Orbital (HOMO) energy level of the first material and a HOMO energy level of the second material is about 0.3 eV or less.