公开(公告)号：US20230038628A1

公开(公告)日：2023-02-09

申请号：US17805619

申请日：2022-06-06

Applicant: Samsung Display Co., LTD.

Inventor： Won Suk HAN ,  Nam Su KANG ,  Heung Su PARK ,  Hui Ju PARK ,  Song Eun LEE ,  Hyun Shik LEE ,  Jae Hoon HWANG

IPC: H01L51/50 ,  H01L27/32 ,  H01L51/52

Abstract: A light emitting device includes: a first electrode; a second electrode overlapping the first electrode; m light emitting units between the first electrode and the second electrode; and m-1 charge generating layers between adjacent light emitting units, wherein the charge generating layer includes: an n-type charge generating layer and a p-type charge generating layer; at least one of a plurality of n-type charge generating layers includes a dopant including an alkali metal, and at least one of a plurality of n-type charge generating layers includes a dopant including a lanthanum metal; contents of the alkali metal and the lanthanum metal doped in the n-type charge generating layer are different from each other; and the m is a natural number of greater than or equal to 3.