公开(公告)号：US10431765B2

公开(公告)日：2019-10-01

申请号：US15693098

申请日：2017-08-31

Applicant: LG Display Co., Ltd.

Inventor： Ji-Young Kim ,  Youn-Seok Kam ,  Ki-Woog Song ,  Tae-Shick Kim ,  Min-Gyu Lee ,  Tae-Seok Lim

IPC: H01L51/50 ,  H01L51/00 ,  H01L51/52 ,  H01L27/32

Abstract: Disclosed are a tandem white organic light emitting diode with long lifespan and low driving voltage, and a display device including the same. The white organic light emitting diode includes a first light emitting part, a second light emitting part and a third light emitting part disposed between a first electrode and a second electrode. The first and third light emitting parts include a blue light emitting layer and the second light emitting part includes a red light emitting layer and a yellow-green light emitting layer. At least one layer of the red light emitting layer and the yellow-green light emitting layer includes a hole transport host based on a compound shown below: wherein each of R1, R2, and R3 are independently selected from hydrogen, heavy hydrogen, a C5-C7 aromatic cyclic and C1-C6 heterocyclic group.

公开(公告)号：US11251391B2

公开(公告)日：2022-02-15

申请号：US16533362

申请日：2019-08-06

Applicant: LG Display Co., Ltd.

Inventor： Tae-Il Kum ,  Tae-Sun Yoo ,  Shin-Han Kim ,  Ji-Young Kim

IPC: H01L51/50 ,  H01L27/32 ,  H01L51/00

Abstract: A light emitting diode comprises first and second electrodes facing each other; a first charge generation layer between the first and second electrodes; a first emitting stack including a first emitting material layer between the first electrode and the first charge generation layer and a first electron transporting layer between the first emitting material layer and the first charge generation layer; and a second emitting stack including a second emitting material layer between the first charge generation layer and the second electrode and a second electron transporting layer between the second emitting material layer and the second electrode, wherein the first charge generation layer has an electron mobility lower than that of the first electron transporting layer.

公开(公告)号：US20180062103A1

公开(公告)日：2018-03-01

申请号：US15693098

申请日：2017-08-31

Applicant: LG Display Co., Ltd.

Inventor： Ji-Young Kim ,  Youn-Seok Kam ,  Ki-Woog Song ,  Tae-Shick Kim ,  Min-Gyu Lee ,  Tae-Seok Lim

IPC: H01L51/50

CPC classification number: H01L51/5044 ,  H01L27/3244 ,  H01L51/0072 ,  H01L51/5004 ,  H01L51/5036 ,  H01L51/5072 ,  H01L51/5278 ,  H01L2251/5384

Abstract: Disclosed are a tandem white organic light emitting diode with long lifespan and low driving voltage, and a display device including the same. The white organic light emitting diode includes a first light emitting part, a second light emitting part and a third light emitting part disposed between a first electrode and a second electrode. The first and third light emitting parts include a blue light emitting layer and the second light emitting part includes a red light emitting layer and a yellow-green light emitting layer. At least one layer of the red light emitting layer and the yellow-green light emitting layer includes a hole transport host based on a compound shown below: wherein each of R1, R2, and R3 are independently selected from hydrogen, heavy hydrogen, a C5-C7 aromatic cyclic and C1-C6 heterocyclic group.