公开(公告)号：US20220209155A1

公开(公告)日：2022-06-30

申请号：US17552112

申请日：2021-12-15

Applicant: LG Display Co., Ltd.

Inventor： Hui Kun YUN ,  Wook SONG

IPC: H01L51/50 ,  H01L51/52

Abstract: A display apparatus including a light-emitting layer is provided. The light-emitting layer may be disposed between a first electrode and a second electrode. The light-emitting layer may include a first emission stack and a second emission stack on the first emission stack. The first emission stack may include a blue emission material layer. The second emission stack may include an emission buffer layer, a first phosphorescent emission material layer and a second phosphorescent emission material layer, which are sequentially stacked. The emission buffer layer may include a host having an electron transporting properties and a red dopant. The content of the red dopant in the emission buffer layer may decrease as a distance from the first charge generation layer increases. Thus, in the display apparatus, a color change at low-current may be improved.