Light-emitting element and iridium complex

• US 20080132701A1
• Filed: 11/01/2007
• Published: 06/05/2008
• Est. Priority Date: 07/17/2000
• Status: Active Grant

• Current Assignee: UDC Ireland Limited (Universal Display Corporation)
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: Ise, Toshihiro, Igarashi, Tatsuya, Mishima, Masayuki, Okada, Hisashi, Xuepeng, Qiu, Miyashita, Yousuke, Fujimura, Hidetoshi
• Granted Patent: US 8,022,212 B2
• Time in Patent Office: Days
• US Class Current: 546/4
• CPC Class Codes: C07F 15/0033 Iridium compounds
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 85/342 comprising iridium
• CPC Class Codes: H10K 85/631 Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
• CPC Class Codes: H10K 85/649 Aromatic compounds comprising a hetero atom
• CPC Class Codes: Y10S 428/917 Electroluminescent

Abstract

A light-emitting element having excellent light-emitting properties and with which it is possible to emit blue light at a high luminance for a long period of time, and an iridium complex for realizing the same. The light-emitting element has an external quantum efficiency of at least 5% and a light emission maximum wavelength λ max of no more than 500 nm. Further, there is provided a light-emitting element including a light-emitting layer or a plurality of organic compound layers having the light-emitting layer, with at least one of the compound layers including at least one kind of a compound having a partial structure represented by the general formula K-0. In the general formula K-0, R¹ to R⁷ each independently represents a hydrogen atom or a substituent, provided that if R² is a fluorine atom, R³ is not a hydrogen atom.

Claims

1. An iridium complex represented by the following Formula K-II:

2. The iridium complex of claim 1, wherein n²¹ represents an integer of 2.

3. The iridium complex of claim 1, wherein L²¹ represents a nitrogen-containing heterocyclic ligand or a diketone ligand.

4. The iridium complex of claim 2, wherein L²¹ represents a nitrogen-containing heterocyclic ligand or a diketone ligand.

5. An iridium complex represented by the following Formula K-IV:

6. The iridium complex of claim 5, wherein n⁴¹ represents an integer of 2.

7. The iridium complex of claim 5, wherein L⁴¹ represents a nitrogen-containing heterocyclic ligand or a diketone ligand.

8. The iridium complex of claim 6, wherein L⁴¹ represents a nitrogen-containing heterocyclic ligand or a diketone ligand.