Organic electroluminescent devices

Details Organic electroluminescent devices Organic electroluminescent devices

2006-08-01

2006-08-01

Flynn, Nathan J. (Department: 2826)

Active solid-state devices (e.g., transistors, solid-state diode

Organic semiconductor material

Reexamination Certificate

active

07084425

ABSTRACT:
Disclosed is an electroluminescent device comprising a cathode and an anode; and, located therebetween, a light-emitting layer (LEL) comprising a phosphorescent green-light-emitting material and a host material for the light-emitting material, and in a layer adjacent to the LEL on the anode side, an exciton-blocking layer containing a compound having a hole mobility of at least 1×10−3cm2V−1s−1and a triplet energy exceeding that of the green-light-emitting material of the LEL. Such a device provides useful light emission.

REFERENCES:
patent: 5405709 (1995-04-01), Littman et al.
patent: 6208075 (2001-03-01), Hung et al.
patent: 6867538 (2005-03-01), Adachi et al.
patent: 2002/0025419 (2002-02-01), Lee et al.
patent: 2002/0034656 (2002-03-01), Thompson et al.
patent: 2003/0017361 (2003-01-01), Thompson et al.
patent: 2003/0068528 (2003-04-01), Thompson et al.
patent: 2003/0137239 (2003-07-01), Matsuura et al.
patent: 2003-092186 (2001-09-01), None
patent: 00/70655 (2000-11-01), None
patent: WO 02/02714 (2002-10-01), None
patent: WO 03/040256 (2003-05-01), None
patent: WO 03/040257 (2003-05-01), None
M. A. Baldo, et al., “Very high-efficiency Green Organic Light-emitting Devices Based on Electrophosphorescence”, Applied Physics Letters, vol. 75, No. 1, pp. 4-6.
T. Tsutsui, et al., “High Quantum Efficiency in Organic Light-Emitting Devices with Iridium-Complex as a Triplet Emissive Center”, Jpn. J. Appl. Phys. vol. 38, 1999, pp. L-1502-L-1504.
C. Adachi, et al., “Efficient Electrophosphorescence Using a Doped Ambipolar Conductive Molecular Organic Thin Film”, Organic Electronics 2, 2001, pp. 37-43.
T. Watanabe, et al., “Optimization of Driving Lifetime Durability in Organic LED Devices Using Ir Complex”, Proceedings of SPIE vol. 4105, 2001, pp. 175-182.

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