公开(公告)号：US12232418B2

公开(公告)日：2025-02-18

申请号：US16582911

申请日：2019-09-25

Applicant: LG DISPLAY CO., LTD.

Inventor： Hyeseung Kang ,  Dohan Kim ,  Jungkeun Kim ,  Seungryong Joung ,  Ki-Woog Song ,  Jungsoo Park ,  Seongsu Jeon ,  Taewoo Jeon

IPC: H10K85/60 ,  H10K50/11 ,  H10K50/13 ,  H10K101/00 ,  H10K101/10 ,  H10K102/00

Abstract: An organic electroluminescence device including an anode, a cathode and a light-emission layer. The light-emission layer includes a stack of a blue light-emission layer and a red/green light concurrent-emission sub-stack. Further, the red/green light concurrent-emission sub-stack includes a stack of a red light-emission layer and a green light-emission layer. The red light-emission layer contains a red host compound including an arylamino group-substituted spirobisfluorene compound. Further, the green light-emission layer contains a green host compound including a mixture between a first green host compound and a second green host compound. Also, the first green host compound includes a bis-carbazole based compound, and the second green host compound includes a carbazole-based compound.

公开(公告)号：US11024821B2

公开(公告)日：2021-06-01

申请号：US16225999

申请日：2018-12-19

Applicant: LG Display Co., Ltd.

Inventor： Seongsu Jeon ,  Seungryong Joung ,  Taewoo Jeon ,  Mi-Young Han

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

Abstract: One embodiment of the present disclosure provides an organic light-emitting element corresponding to each pixel region. The organic light-emitting element includes a hole transport layer, a first light-emitting layer, a second light-emitting layer, a third light-emitting layer, a fourth light-emitting layer, and an electron transport layer. The first light-emitting layer includes a first dopant corresponding to a first color and a first host. The second light-emitting layer includes a second dopant corresponding to a second color different from the first color and a second host different from the first host. The third light-emitting layer includes the first dopant and the second host, and the fourth light-emitting layer includes the second dopant and the second host.