Active solid-state devices (e.g. – transistors – solid-state diode – Organic semiconductor material
Reexamination Certificate
2005-08-23
2005-08-23
Nelms, David (Department: 2818)
Active solid-state devices (e.g., transistors, solid-state diode
Organic semiconductor material
C257S098000, C257S103000, C313S509000, C313S500000
Reexamination Certificate
active
06933522
ABSTRACT:
An organic electroluminescent device with the feature of three-wavelength luminescence is provided. The device includes a hole transporting layer, an electron blocking layer, a first host material layer, a second host material layer, a hole blocking layer, and an electron transporting layer placed between an anode and a cathode in turn. In which, the first host material layer has a first guest luminous substance mixed therein for projecting a first color light source (B), while the second host material layer correspondingly has a second guest luminous substance and a third guest luminous substance mixed therein for projecting a second color light source (G) and a third color light source (R), respectively, under the effect of an external bias voltage, wherein said second guest luminous substance or said third guest luminous substance may be a phosphorescence substance. Thus, not only a continuously full-band, full-colored light source featuring three-wavelength may be acquired directly by means of the combination of RGB colors, but also an effective utilization of phosphorescence substance and thus significantly raised luminescence efficiency may be obtained.
REFERENCES:
patent: 2003/0178619 (2003-09-01), Forrest et al.
Chuang Feng-Ju
Huang Yen-Shih
Jou Jwo-Huei
Lin Ming-Der
Nelms David
Opto Tech Corporation
Rosenberg , Klein & Lee
Tran Long
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