公开(公告)号：US20200058884A1

公开(公告)日：2020-02-20

申请号：US16538234

申请日：2019-08-12

Applicant: LG Display Co., Ltd.

Inventor： Jaehyun PARK ,  Somang KIM ,  Kyunam KIM

IPC: H01L51/00 ,  H01L51/50

Abstract: Provided is a quantum dot light-emitting device and a display apparatus including the same. The quantum dot light-emitting device comprises: an anode; a cathode; a hole transport layer disposed between the anode and the cathode; a light-emitting layer disposed between the hole transport layer and the cathode, the light-emitting layer including a quantum dot having a core-shell structure; and a buffer layer disposed between the hole transport layer and the light-emitting layer, wherein the buffer layer contains an organic compound or derivatives thereof. The external quantum efficiency and device stability are improved. an aromatic hydrocarbon compound or derivatives thereof having a functional group selected from the group consisting of a hydroxyl group (—OH), a carboxyl group (—COOH), an amino group (—NR, —NH, —NH2, where R is a C1 to C6 monovalent hydrocarbon group or derivatives thereof) and a thiol group (—SH).