Active solid-state devices (e.g. – transistors – solid-state diode – Organic semiconductor material
Reexamination Certificate
2005-04-26
2005-04-26
Nelms, David (Department: 2818)
Active solid-state devices (e.g., transistors, solid-state diode
Organic semiconductor material
C257S040000, C257S642000
Reexamination Certificate
active
06885025
ABSTRACT:
The present invention relates to organic light emitting devices (OLEDs). The devices of the present invention are efficient white or multicolored phosphorescent OLEDs which have a high color stability over a wide range of luminances. The devices of the present invention comprise an emissive region having at least two emissive layers, with each emissive layer comprising a different host and emissive dopant, wherein at least one of the emissive dopants emits by phosphorescence.
REFERENCES:
patent: 4769292 (1988-09-01), Tang et al.
patent: 5247190 (1993-09-01), Friend et al.
patent: 5707745 (1998-01-01), Forrest et al.
patent: 5834893 (1998-11-01), Bulovic et al.
patent: 5844363 (1998-12-01), Gu et al.
patent: 6013982 (2000-01-01), Thompson et al.
patent: 6087196 (2000-07-01), Sturm et al.
patent: 6091195 (2000-07-01), Forrest et al.
patent: 6097147 (2000-08-01), Baldo et al.
patent: 6294398 (2001-09-01), Kim et al.
patent: 6303238 (2001-10-01), Thompson et al.
patent: 6312836 (2001-11-01), Bulovic et al.
patent: 6337102 (2002-01-01), Forrest et al.
patent: 6468819 (2002-10-01), Kim et al.
patent: 6528188 (2003-03-01), Suzuki et al.
patent: 6548956 (2003-04-01), Forrest et al.
patent: 20020106530 (2002-08-01), Ishibashi et al.
patent: 20030068524 (2003-04-01), Hatwar
US 5,703,736, 12/1997, Forrest et al. (withdrawn)
Baldo et al., “Highly Efficient Phosphorescent Emission from Organic Electroluminescent Devices”, Nature, vol. 395, 151-154 (1998).
Baldo et al. “Very High-Efficiency Gren Organic Light-Emitting Devices Based on Electrophosphorescence”, Appl. Phys. Lett., vol. 75, No. 3, 4-6 (1999).
Adachi et al., “Nearly 100% Internal Phosphorescent Efficiency In An Organic Light Emitting Device”, J. Appl. Phys., 90, 5048 (2001).
Zhou et al., “High-efficiency electrophosphorescent organic light-emitting diodes with double light-emitting layers”, Appl. Phys. Lett., vol. 81, No. 21, 4070-4072 (Nov. 18, 2002).
Kwong Raymond C.
Lu Michael
Tung Yeh-Jiun
Nelms David
Nguyen Thinh T
Universal Display Corporation
LandOfFree
Organic light emitting device structures for obtaining... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Organic light emitting device structures for obtaining..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Organic light emitting device structures for obtaining... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3401762