Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2005-11-22
2005-11-22
Garrett, Dawn L. (Department: 1774)
Stock material or miscellaneous articles
Composite
Of inorganic material
C428S917000, C313S112000, C313S504000, C313S506000, C257S088000, C257S098000
Reexamination Certificate
active
06967062
ABSTRACT:
An organic light-emitting diode (OLED) device which produces substantially white light includes an anode; a hole-transporting layer disposed over the anode; and a blue light-emitting layer having a host doped with a blue light-emitting compound disposed directly on the hole-transporting layer and the blue light-emitting layer being doped with an electron-transporting or a hole-transporting material or both selected to improve efficiency and operational stability. The device also includes an electron-transporting layer disposed over the blue light-emitting layer; a cathode disposed over the electron-transporting layer; and the hole-transporting layer or electron-transporting layer, or both the hole-transporting layer and electron-transporting layer, being selectively doped with a compound which emits light in the yellow region of the spectrum which corresponds to an entire layer or a partial portion of a layer in contact with the blue light-emitting layer.
REFERENCES:
patent: 2003/0170496 (2003-09-01), Hieda et al.
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patent: 1 187 235 (2002-03-01), None
patent: 1 286 569 (2003-02-01), None
Hamada et al., Applied Physics Letters, vol. 75, No. 12, pp. 1682-1684, (1999).
Hatwar Tukaram K.
Ricks Michele L.
Spindler Jeffrey P.
Winters Dustin
Close Thomas H.
Eastman Kodak Company
Garrett Dawn L.
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