公开(公告)号：US20230217815A1

公开(公告)日：2023-07-06

申请号：US18079709

申请日：2022-12-12

Applicant: LG Display Co., Ltd.

Inventor： Wook SONG ,  Min Hyeong HWANG ,  Myeong Seon CHO ,  Chun Ki KIM ,  Sae Mi PARK ,  Young Jun YU ,  Jung Keun KIM ,  Byung Soo KIM ,  Sang Beom KIM

IPC: H10K85/60 ,  H10K59/35

CPC classification number: H01L51/0067 ,  H01L27/3211 ,  H01L51/0072 ,  H01L51/006 ,  H01L51/0061 ,  H01L51/5072

Abstract: A light emitting device and a light emitting display including the same. The light emitting device includes an anode and a cathode facing each other, a first stack and a second stack disposed between the anode and the cathode, the first stack including a first electron transport layer comprising a first material represented by Formula 1, a first blue light emitting layer containing a boron-based compound emitting light having a wavelength of 430 nm to 480 nm, and a first electron-blocking layer including a second material including a spirofluorene group, and at least one hydrogen atom on at least one side of the spirofluorene group is substituted by deuterium, and the second stack including at least two phosphorescent light emitting layers emitting light having a longer wavelength than that of the light emitted by the first blue light emitting layer, and a charge generation layer.

公开(公告)号：US20230217669A1

公开(公告)日：2023-07-06

申请号：US18082583

申请日：2022-12-16

Applicant: LG Display Co., Ltd.

Inventor： Myeong Seon CHO ,  Wook SONG ,  Sae Mi PARK ,  Jung Keun KIM ,  Do Han KIM ,  Byung Soo KIM ,  Hye Seung KANG

IPC: H10K50/13 ,  H10K50/12 ,  H10K50/15 ,  H10K50/16 ,  H10K59/35 ,  H10K85/60

CPC classification number: H10K50/13 ,  H10K50/12 ,  H10K50/15 ,  H10K50/16 ,  H10K59/351 ,  H10K85/654 ,  H10K85/6572 ,  H10K85/6574 ,  H10K85/6576 ,  B82Y30/00

Abstract: A light emitting device including a first electrode and a second electrode facing each other, and a first blue stack, a first charge generation layer, and a phosphorescent stack disposed between the first electrode and the second electrode. The phosphorescent stack includes a hole transport layer, a red light emitting layer, a green light emitting layer, and an electron transport layer. The red light emitting layer includes an electron transport host represented by Formula 1, a hole transport host different from the hole transport layer, and a red dopant.

公开(公告)号：US20230217816A1

公开(公告)日：2023-07-06

申请号：US18084235

申请日：2022-12-19

Applicant: LG Display Co., Ltd.

Inventor： Wook SONG ,  Myeong Seon CHO ,  Sae Mi PARK ,  Jung Keun KIM ,  Do Han KIM ,  Byung Soo KIM ,  Hye Seung KANG

IPC: H10K85/60 ,  H10K50/13

CPC classification number: H01L51/0067 ,  H01L51/0072 ,  H01L51/0073 ,  H01L51/0074 ,  H01L51/504 ,  H01L51/5012

Abstract: Disclosed is a light emitting device capable of improving color purity and luminance, reducing a material driving voltage, and exhibiting a longer lifespan by changing the configuration of a green stack. The light emitting device includes a first electrode and a second electrode facing each other, and a light emitting unit including a p-type charge generation layer, a hole transport layer, and a green light emitting layer, which are sequentially stacked, wherein the green light emitting layer includes a triazine-based compound as a host and a phosphorescent dopant.

公开(公告)号：US20230217668A1

公开(公告)日：2023-07-06

申请号：US18071289

申请日：2022-11-29

Applicant: LG Display Co., Ltd.

Inventor： Myeong Seon CHO ,  Sae Mi PARK ,  Wook SONG

IPC: H10K50/12 ,  H10K50/16 ,  H10K50/13 ,  H10K59/12

CPC classification number: H01L51/5024 ,  H01L51/5072 ,  H01L51/504 ,  H01L27/3244

Abstract: Discussed is a light-emitting device that can include a first electrode and a second electrode facing each other, and disposed on a substrate; a first light emitting stack and a second light emitting stack between the first electrode and the second electrode; and a charge generation stack between the first light emitting stack and the second light emitting stack. The charge generation stack can include a first layer including a first host, a second host, and a metal dopant, and a second layer including the first host, the metal dopant, a third host, and a p-type organic dopant. Amounts of the metal dopant in the first layer and the second layer respectively can increase in going towards an interface between the first layer and the second layer.