Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Reexamination Certificate
2006-05-16
2006-05-16
Williams, Joseph (Department: 2879)
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
C313S506000
Reexamination Certificate
active
07045952
ABSTRACT:
An organic light emitting device is provided. The devices of the present invention comprise an emissive region having at least two emissive layers, with at least one layer comprising a first host and another layer comprising a first and a second host, and each layer further comprising a phosphorescent emissive material. In one embodiment, the device comprises an emissive region disposed between and electrically connected to an anode and a cathode, wherein the emissive region comprises (i) a first single-host emissive layer, comprising a first host material, and (ii) a mixed-host emissive layer in direct contact with the first single-host layer, wherein the mixed-host layer comprises the first host material, and a second host material, and wherein the first single-host layer and the mixed-host layer each further comprise a phosphorescent emissive material. In another embodiment, the device further comprises (iii) a second single-host emissive layer, comprising a second host material, and wherein the first single-host layer, the mixed-host layer, and the second single-host layer each further comprise a phosphorescent emissive material.
REFERENCES:
patent: 4769292 (1988-09-01), Tang et al.
patent: 5247190 (1993-09-01), Friend et al.
patent: 5703436 (1997-12-01), Forrest et al.
patent: 5707745 (1998-01-01), Forrest et al.
patent: 5773929 (1998-06-01), Shi et al.
patent: 5834893 (1998-11-01), Bulovic et al.
patent: 5834894 (1998-11-01), Shirasaki et al.
patent: 5844363 (1998-12-01), Gu et al.
patent: 5853905 (1998-12-01), So et al.
patent: 5925980 (1999-07-01), So et al.
patent: 6010796 (2000-01-01), Kijima
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: 6130001 (2000-10-01), Shi et al.
patent: 6191764 (2001-02-01), Kono et al.
patent: 6194089 (2001-02-01), Choong et al.
patent: 6224966 (2001-05-01), Sakai et al.
patent: 6294398 (2001-09-01), Kim et al.
patent: 6303238 (2001-10-01), Thompson et al.
patent: 6310360 (2001-10-01), Forrest et al.
patent: 6337102 (2002-01-01), Forrest et al.
patent: 6392250 (2002-05-01), Aziz et al.
patent: 6468819 (2002-10-01), Kim et al.
patent: 6501102 (2002-12-01), Mueller-Mach et al.
patent: 6521360 (2003-02-01), Lee et al.
patent: 6573651 (2003-06-01), Adachi et al.
patent: 6614175 (2003-09-01), Aziz et al.
patent: 6687266 (2004-02-01), Ma et al.
patent: 6692846 (2004-02-01), Hatwar et al.
patent: 6803720 (2004-10-01), Kwong et al.
patent: 6867538 (2005-03-01), Adachi et al.
patent: 2002/0034656 (2002-03-01), Thompson et al.
patent: 2002/0074935 (2002-06-01), Kwong et al.
patent: 2002/0127427 (2002-09-01), Young et al.
patent: 2002/0180347 (2002-12-01), Adachi et al.
patent: 2002/0182441 (2002-12-01), Lamansky et al.
patent: 2003/0072964 (2003-04-01), Kwong et al.
patent: 2003/0230980 (2003-12-01), Forrest et al.
patent: 1 220 339 (2002-07-01), None
patent: 02/071813 (2002-09-01), None
patent: 02/074015 (2002-09-01), None
patent: WO 02/071813 (2002-09-01), None
patent: 03/100880 (2003-12-01), None
Lu, et al., U.S. Appl. No. 09/931,948, filed Aug. 20, 2001, entitled “Transparent electrodes”.
Shtein, et al., U.S. Appl. No. 10/233,470, filed Sep. 4, 2002, entitled “Process and apparatus for organic vapor jet deposition”.
U.S. Appl. No. 10/618,160 to Tung et al., filed Jul. 10, 2003.
Baldo et al., “Highly Efficient Phosphorescent Emission from Organic Electroluminescent Devices,” Nature, vol. 395, pp. 151-154 (1998).
Baldo et al., “Very High-Efficiency Green Organic Light-Emitting Devices Based on Electrophosphorescence,” Appl. Phys. Lett., vol. 75, No. 3, pp. 4-6 (1999).
Adachi et al., “Nearly 100% Internal Phosphorescent Efficiency in an Organic Light Emitting Device,” J. Appl. Phys., vol. 90, pp. 5048 (2001).
Zhou et al., “Low-Voltage Inverted Transparent Vacuum Deposited Organic Light-Emitting Diodes Using Electrical Doping,” Appl. Phys. Lett., vol. 81, No. 5 (2002).
International Search Report, Appln. No. PCT/US005/1006124, Feb. 24, 2005.
Zhou et al., “High-efficiency electrophosphorescent organic light-emitting diodes with double light-emitting layers” Appl. Phys. Lett., vol. 61, No. 21, p. 4070-7072 (2002).
Holmes et al., “Efficient, Deep-blue organic electrophosphorescence by guest charge trapping” Appl. Phys. Lett., vol. 83, No. 18, p. 3818-3820 (2003).
Aziz et al., “Study of organic light emitting devices with a 5.6,11,12-teraphenylnaphthacene (rubrene)-doped hole transport layer”,Appl. Phys. Lett., vol. 80, No. 12, p. 2180-2182 (2002).
Aziz et al. “Degradation Mechanism of Small Molecule-Based Organic Light Emitting Devices”, Science, vol. 283, p. 1900-1902 (1999).
Dong Dalei
Kenyon & Kenyon LLP
Universal Display Corporation
Williams Joseph
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