公开(公告)号：US20230209853A1

公开(公告)日：2023-06-29

申请号：US17896535

申请日：2022-08-26

Applicant: LG DISPLAY CO., LTD.

Inventor： Hyun-Sook JEON ,  Moon-Sung KIL ,  Eun-Hyung LEE

IPC: H01L51/50 ,  H01L27/32 ,  H01L51/56

CPC classification number: H01L51/5024 ,  H01L27/3218 ,  H01L51/5016 ,  H01L51/56 ,  H01L51/5088 ,  H01L51/5072 ,  H01L51/5056

Abstract: An organic light emitting diode display device includes a substrate having a plurality of subpixels; and an emitting material layer in the plurality of subpixels on the substrate, wherein the emitting material layer in at least one of the plurality of subpixels comprises: a first emitting material layer including a first host and a dopant; a second emitting material layer on the first emitting material layer and including a second host and the dopant; and a third emitting material layer on the second emitting material layer and including one of the dopant and the second host.

公开(公告)号：US20230217673A1

公开(公告)日：2023-07-06

申请号：US17953523

申请日：2022-09-27

Applicant: LG DISPLAY CO., LTD.

Inventor： Mi-Na KIM ,  Moon-Sung KIL

IPC: H01L51/50 ,  H01L51/00

CPC classification number: H01L51/5056 ,  H01L51/5072 ,  H01L51/5096 ,  H01L51/0073 ,  H01L51/0059 ,  H01L51/006 ,  H01L51/0061 ,  H01L51/0052 ,  H01L51/0074 ,  H01L2251/558

Abstract: An electroluminescent display device includes a substrate on which a plurality of sub-pixels are defined; a first electrode in each sub-pixel on the substrate; a first hole transporting layer on the first electrode; a second hole transporting layer on the first hole transporting layer; a third hole transporting layer on the second hole transporting layer; a light-emitting material layer on the third hole transporting layer; an electron transporting layer on the light-emitting material layer; and a second electrode on the electron transporting layer, wherein the first hole transporting layer includes a P-type dopant and a first hole transporting material, the second hole transporting layer includes the first hole transporting material, and the third hole transporting layer includes a second hole transporting material, and wherein a total thickness of the first and second hole transporting layers is equal to or greater than a thickness of the third hole transporting layer.