Title:
発光素子及びこれを用いた発光表示装置
Document Type and Number:
Japanese Patent JP7449359
Kind Code:
B2
Abstract:
Disclosed are a light emitting device and a light emitting display device that are capable of improving efficiency, driving voltage, and lifespan by varying the configuration of a layer adjacent to a blue light emitting layer in a blue fluorescent stack contacting a cathode. The light emitting device includes n (wherein n is a natural number of 2 or more) stacks between an anode and a cathode facing each other, wherein an nth stack contacting the cathode is a first blue stack, wherein the first blue stack includes a first hole transport layer, a first electron-blocking layer, a first blue light emitting layer containing a boron-based dopant having an emission peak of 430 nm to 480 nm, a first electron transport layer contacting the blue light emitting layer, and an electron injection layer having two sides contacting the first electron transport layer and the cathode, respectively, wherein the first electron transport layer contains a mixture of a first material of Formula 1 with a second material of Formula 2.
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Inventors:
Sun Soo
Park Saemi
Zhao Mingxuan
黄 ▲ミン▼ 亨
Kim Tsubaki Motoi
Kim Jung-geun
Kim Byung Soo
▲ユ▼ 榮 ▲ジュン▼
Kim Sang Bum
Park Saemi
Zhao Mingxuan
黄 ▲ミン▼ 亨
Kim Tsubaki Motoi
Kim Jung-geun
Kim Byung Soo
▲ユ▼ 榮 ▲ジュン▼
Kim Sang Bum
Application Number:
JP2022204068A
Publication Date:
March 13, 2024
Filing Date:
December 21, 2022
Export Citation:
Assignee:
LG Display Company Limited
International Classes:
H10K50/19; C07D213/22; C07D235/08; C07D401/14; G09F9/30; H10K50/12; H10K50/13; H10K50/15; H10K50/16; H10K50/165; H10K50/17; H10K50/18; H10K59/12; H10K85/30; H10K85/60
Domestic Patent References:
| JP2016132642A | ||||
| JP2019161218A |
Foreign References:
| KR1020180001826A | ||||
| US20200052234 | ||||
| US20210130355 | ||||
| US20190348613 | ||||
| WO2021034039A1 | ||||
| WO2020067593A1 | ||||
| WO2014010824A1 | ||||
| US20210273192 | ||||
| KR1020210072414A |
Attorney, Agent or Firm:
Okabe
Koji Yoshizawa
Haruhiko Mimura
Hiroshi Okabe
Takashi Miyake
Koji Yoshizawa
Haruhiko Mimura
Hiroshi Okabe
Takashi Miyake