公开(公告)号：US20210288263A1

公开(公告)日：2021-09-16

申请号：US17028985

申请日：2020-09-22

Applicant: Samsung Display Co., Ltd.

Inventor： Mikyung KIM ,  Jaehyun LEE ,  Jiwon KWAK ,  Jihyun SEO ,  Seunggak YANG ,  Hanbyul JANG

IPC: H01L51/00

Abstract: A light-emitting device includes a hole transport region including two layers each including a Compound A group, a Compound B group, or any combination thereof, wherein the Compound A group includes one or two amine groups, and the amine group includes a fluorene moiety, a carbazole moiety, a dibenzofuran moiety, a dibenzothiophene moiety, a dibenzosilole moiety, or any combination thereof, and the Compound B group does not includes an amine group, and includes a fluorene moiety, a carbazole moiety, a dibenzofuran moiety, a dibenzothiophene moiety, a dibenzosilole moiety, or any combination thereof.

公开(公告)号：US20210313535A1

公开(公告)日：2021-10-07

申请号：US17156610

申请日：2021-01-24

Applicant: Samsung Display Co., Ltd.

Inventor： Mikyung KIM ,  Jaehyun LEE ,  Jiwon KWAK ,  Hyerim KIM ,  Jihyun SEO ,  Hanbyul JANG

IPC: H01L51/50

Abstract: A light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an interlayer disposed between the first electrode and the second electrode and having an emission layer, wherein the interlayer includes: i) a hole transport region disposed between the first electrode and the emission layer; and ii) an electron transport region disposed between the emission layer and the second electrode; wherein: the emission layer includes three or more hosts; the electron transport region includes a buffer layer; the three or more hosts include a hole transport host, a first electron transport host, and a second electron transport host; the buffer layer includes a third electron transport host; and a lowest unoccupied molecular orbital energy level of the second electron transport host is substantially equal to a lowest unoccupied molecular orbital energy level of the third electron transport host.

公开(公告)号：US20200274087A1

公开(公告)日：2020-08-27

申请号：US16560272

申请日：2019-09-04

Applicant: Samsung Display Co., Ltd.

Inventor： Jaehyun LEE ,  Mikyung KIM ,  Seunggak YANG ,  Jiwon KWAK ,  Namwoo KIM ,  Byounghee PARK ,  Hanbyul JANG

IPC: H01L51/50 ,  H01L51/52

Abstract: An organic light-emitting device is provided. The organic light-emitting device includes: an anode; a cathode; and an organic layer between the anode and the cathode and including an emission layer, wherein the emission layer includes a first emission layer including a first host, a second host, and a first dopant, and a second emission layer including a third host, a fourth host, and a second dopant, and the organic light-emitting device satisfies Equations 1 and 2.