公开(公告)号：US20250031516A1

公开(公告)日：2025-01-23

申请号：US18639830

申请日：2024-04-18

Applicant: Samsung Display Co., Ltd.

Inventor： HYERIM KIM ,  GYEONGHEON KIM ,  HANBYUL JANG ,  HEEJIN KIM ,  JIHYUN SEO

IPC: H10K50/12 ,  C09K11/06 ,  H10K50/13 ,  H10K85/30 ,  H10K101/30

Abstract: A display device including a circuit layer and a display element layer on the circuit layer and including a light emitting element is provided. The light emitting element includes a first electrode, a first emission layer which includes a first dopant and is provided on the first electrode, a second emission layer which includes a second dopant different from the first dopant and is provided on the first emission layer, and a second electrode provided on the second emission layer. A triplet excited state energy level (T1) of the second dopant may be higher than that of the first dopant, and the thickness of the first emission layer is about 10% to about 50% based on 100% of the sum of the thickness of the first emission layer and the thickness of the second emission layer. The display device may have improved side-surface luminance ratio and excellent display efficiency.

公开(公告)号：US20230403877A1

公开(公告)日：2023-12-14

申请号：US18137239

申请日：2023-04-20

Applicant: Samsung Display Co., Ltd.

Inventor： JIHO SOHN ,  SUNGJIN MUN ,  JIHYUN SEO ,  JAE YOUNG LEE ,  JUNYOUNG LEE ,  JAHYUN IM ,  SANGHO JEON

IPC: H10K50/15 ,  H10K50/125 ,  H10K50/16

CPC classification number: H10K50/15 ,  H10K50/125 ,  H10K50/16 ,  H10K2101/30

Abstract: A light emitting diode and a display device including the light emitting diode are provided. The light emitting diode may include a first electrode, a hole transport region disposed on the first electrode, an emission auxiliary layer disposed on the hole transport region, a first buffer layer disposed on the emission auxiliary layer, an emission layer disposed on the first buffer layer and including a hole transport host, an electron transport host, and a dopant having a dipole moment of about 2.0 Debye (D) or less, a second buffer layer disposed on the emission layer, an electron transport region disposed on the second buffer layer, and a second electrode disposed on the electron transport region.