Stable emitters

• US 9,224,963 B2
• Filed: 12/05/2014
• Issued: 12/29/2015
• Est. Priority Date: 12/09/2013
• Status: Active Grant

• Current Assignee: Arizona Board of Regents (University of Arizona)
• Original Assignee: Arizona Board of Regents (University of Arizona)
• Inventors: Li, Jian, Li, Guijie
• Primary Examiner(s): Aulakh, Charanjit
• Application Number:
  US14/562,195
• Publication Number:
  US 20150162552A1
• Time in Patent Office: 389 Days
• Field of Search: 546/2, 546/10, 313/504, 428/690
• US Class Current: 1/1
• CPC Class Codes: C07F 15/0086 Platinum compounds
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 2211/185 of the platinum group, i.e. Os, Ir, Pt, Ru, Rh or Pd
• CPC Class Codes: H10K 2101/10 Triplet emission
• CPC Class Codes: H10K 2102/103 comprising indium oxides, e.g. ITO
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 85/324 comprising aluminium, e.g. Alq3
• CPC Class Codes: H10K 85/346 comprising platinum

Abstract

Stable and efficient organic light-emitting diodes were prepared using tetradentate platinum-based blue and red emitters. In one example, a series of stable and efficient red phosphorescent OLEDs was fabricated employing a phenyl-pyridyl-carbazole based tetradentate cyclometalated Pt(II) complex as an emitting dopant and utilizing a commercially available host, transporting, and blocking materials. By implementing this platinum complex in electrochemically stable device architectures, long operational lifetimes were achieved with an estimated LT₉₇ of over 600 hrs at luminance of 1000 cd/m².

Claims

1. A compound represented by one of the following chemical structures:

2. A light-emitting device comprising the compound of claim 1 as an emitter.

3. An OLED device comprising the compound of claim 1 as an emitter.

4. A luminescent display device comprising the compound of claim 1.

5. A compound represented by one of the following chemical structures:

6. A light-emitting device comprising the compound of claim 5 as an emitter.

7. An OLED device comprising the compound of claim 5 as an emitter.

8. A luminescent display device comprising the compound of claim 5.

9. A compound represented by one of the following chemical structures:

10. A light-emitting device comprising the compound of claim 9 as an emitter.

11. An OLED device comprising the compound of claim 9 as an emitter.

12. A luminescent display device comprising the compound of claim 9.