White organic electroluminescence device

Details White organic electroluminescence device White organic electroluminescence device

2004-06-24

2010-06-29

Tarazano, D. Lawrence (Department: 1794)

Stock material or miscellaneous articles

Composite

Of inorganic material

C428S917000, C313S504000, C313S506000, C257S040000

Reexamination Certificate

active

07745016

ABSTRACT:
An organic electroluminescence device emitting white light which comprises at least two light emitting layers and an electron transporting layer comprising a heterocyclic derivative having nitrogen atom or silicon atom which are disposed between a pair of electrodes, wherein the energy gap of a host compound in each light emitting layer is in a specific range, the energy gap of the heterocyclic derivative having nitrogen atom or silicon atom in the electron transporting layer is in a specific range, and the ionization potential of the heterocyclic derivative having nitrogen atom or silicon atom in the electron transporting layer and the ionization potential of the host compound in the light emitting layer adjacent to the electron transporting layer satisfy a specific relation. The organic electroluminescence device provides a great efficiency of light emission under a low voltage and has a long lifetime, and exhibits no change in the chromaticity.

REFERENCES:
patent: 6224966 (2001-05-01), Sakai et al.
patent: 6509109 (2003-01-01), Nakamura et al.
patent: 6878469 (2005-04-01), Yoon et al.
patent: 6967062 (2005-11-01), Hatwar et al.
patent: 7037601 (2006-05-01), Hatwar
patent: 2002/0168544 (2002-11-01), Fukuoka et al.
patent: 2003/0068524 (2003-04-01), Hartwar
patent: 2003/0099860 (2003-05-01), Lin et al.
patent: 2003/0215667 (2003-11-01), Xie
patent: 2006/0257684 (2006-11-01), Arakane et al.
patent: 0 949 696 (1999-10-01), None
patent: 1 727 396 (2006-11-01), None
patent: 2002-216969 (2002-08-01), None
patent: 2002-343571 (2002-11-01), None
patent: WO02/088274 (2002-11-01), None
patent: WO2004/034751 (2004-04-01), None
patent: 2004/047499 (2004-06-01), None
Lim et al., “Synthesis and characteristics of bis(2,4-dimethyl-8-quinolinolato)(triphenylsilanolato)aluminum (III): A potential hole-blocking material for the organic light-emitting diodes,” Journal of Organometallic Chemistry, vol. 691, No. 12, pp. 2701-2707, Jun. 2006.

Affiliated with

Also associated with

Rating

White organic electroluminescence device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with White organic electroluminescence device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and White organic electroluminescence device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4176548