公开(公告)号：US20220149312A1

公开(公告)日：2022-05-12

申请号：US17374517

申请日：2021-07-13

Applicant: Samsung Display Co., Ltd.

Inventor： SEOKJAE LEE ,  YUNJAE KIM ,  JUNGKYUN KIM ,  HYUNGU KIM ,  BOHUN PARK ,  JIN WOO PARK ,  JUNGJIN YANG ,  BUM SUK LEE ,  SUNHYE LEE ,  JAEJIN LEE

IPC: H01L51/52 ,  H01L51/50

Abstract: A light-emitting element may include a first electrode, a second electrode facing the first electrode, a first hole transport layer disposed above the first electrode, a first electron transport layer disposed between the first hole transport layer and the second electrode. A first light-emitting part and a second light-emitting part that emit different light may be disposed between the first hole transport layer and the first electron transport layer. The first light-emitting part may include a first blue emission layer, a second electron transport layer, a charge generation layer, and a second blue emission layer, and the first blue emission layer may be disposed above the first hole transport layer. At least one of the first electron transport layer and the second electron transport layer may be directly disposed above at least one of the first blue emission layer and the second blue emission layer.

公开(公告)号：US20220140015A1

公开(公告)日：2022-05-05

申请号：US17347851

申请日：2021-06-15

Applicant: Samsung Display Co., LTD.

Inventor： SOLJI KIM ,  JUNGJIN YANG ,  DONGHOON KIM ,  JIN WOO PARK ,  JINSOOK BANG ,  SEOKJAE LEE ,  SUNHYE LEE ,  SANGHOON YIM

IPC: H01L27/32 ,  H01L51/52

Abstract: A display device includes a first pixel area including a first pixel electrode and a first organic light emitting layer, a tandem pixel area including a tandem pixel electrode, a first tandem organic light emitting layer and a second tandem organic light emitting layer, a capping layer including a first capping layer corresponding to the first organic light emitting layer and a tandem capping layer corresponding to both the first tandem organic light emitting layer and the second tandem organic light emitting layer, and a common electrode between the first capping layer and the first organic light emitting layer and between the tandem capping layer and the second tandem organic light emitting layer. Each of the first capping layer and the tandem capping layer has a thickness, and the thickness of the tandem capping layer is smaller than the thickness of the first capping layer.

公开(公告)号：US20220123061A1

公开(公告)日：2022-04-21

申请号：US17358593

申请日：2021-06-25

Applicant: Samsung Display Co., Ltd.

Inventor： SEOKJAE LEE ,  YUNJAE KIM ,  JUNGKYUN KIM ,  HYUNGU KIM ,  BOHUN PARK ,  JIN WOO PARK ,  JUNGJIN YANG ,  BUM SUK LEE ,  SUNHYE LEE ,  JAEJIN LEE

IPC: H01L27/32 ,  H01L51/52

Abstract: A display device includes a substrate in which first and second pixel areas respectively emitting first and second light respectively having different emission wavelengths from each other are defined, a first electrode on the substrate to overlap the first and second pixel areas, a hole transport region on the first electrode to overlap the first and second pixel areas, first and second organic layers on the hole transport region to respectively overlap the first and second pixel areas, an electron transport region on the first and second organic layers to overlap the first and second pixel areas, and a second electrode on the electron transport region to overlap the first and second pixel areas. The first organic layer includes first emission layers emitting the first light and a first charge generation layer between the first emission layers, and the second organic layer includes a single second emission layer emitting the second light.