Materials for organic light-emitting diodes

• US 20090134783A1
• Filed: 11/14/2008
• Published: 05/28/2009
• Est. Priority Date: 11/16/2007
• Status: Active Grant

• Current Assignee: Academia Sinica (Government of The Republic of China)
• Original Assignee: Academia Sinica (Government of The Republic of China)
• Inventors: Lin, Jiann T'suen, Chen, Chih-Hsin, Lai, Mei-Yi
• Granted Patent: US 7,910,228 B2
• Time in Patent Office: Days
• US Class Current: 313/504
• CPC Class Codes: C07D 235/18 with aryl radicals directly attached in position 2
• CPC Class Codes: C07D 403/04 directly linked by a ring-member-to-ring-member bond
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 2211/1044 containing two nitrogen atoms as heteroatoms
• CPC Class Codes: H05B 33/14 characterised by the chemical or physical composition or the arrangement of the electroluminescent material , or by the simultaneous addition of the electroluminescent material in or onto the light source
• CPC Class Codes: H10K 2101/10 Triplet emission
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/125 specially adapted for multicolour light emission, e.g. for emitting white light
• 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 85/6572 comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole

Abstract

The present invention provides for emissive materials comprising compounds of specific chemical structure, and electroluminescent devices comprising such emissive materials.

Claims

1. An emissive material comprising a compound selected from the group having the formula:

2. An electroluminescent device, comprising:

a) a spaced-apart anode and cathode; and

b) an emissive layer of claim 1 disposed between the spaced-apart anode and cathode.

3. An electroluminescent device comprising:

a hole transport layer; and

an electron transport layer;

wherein at least one of said hole transport layer and said electron transport layer comprises either alone or in combination a compound of the formula;

4. The electroluminescent device of claim 3 wherein the hole transport layer further comprises an emitting dopant.

5. The electroluminescent device of claim 3 wherein the electron transport further comprises an emitting dopant.