Providing an emission-protecting layer in an OLED device

Details Providing an emission-protecting layer in an OLED device Providing an emission-protecting layer in an OLED device

2005-02-08

2005-02-08

Patel, Vip (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C313S506000

Reexamination Certificate

active

06853133

ABSTRACT:
An organic light-emitting device with improved performance including an anode formed over a substrate; a hole-transporting layer formed over the anode; and a light emitting layer formed over the hole-transporting layer for producing light in response to hole-electron recombination. The organic light-emitting device also includes an emission-protecting layer formed over the light-emitting layer, wherein the emission-protecting layer includes one or more materials selected to resist the surface contamination on the organic light-emitting layer and to ensure that there will be less surface contamination than if such layer had not been provided; an electron-transporting layer formed over the emission-protecting layer; and a cathode formed over the electron-transporting layer.

REFERENCES:
patent: 4769292 (1988-09-01), Tang et al.
“Organic Electroluminescent Diodes” by C. W. Tang, et al., Applied Physics Letter 51 (12) Sep. 21, 1987, pp. 913-915.
“A Chemical Failure Mechanism for Aluminum(III) 8-Hydroxyquinoline Light-Emitting Devices” by F. Papadimitrakopoulos et al., Chemical Material 1996, 8, pp. 1363-1365.
“Electroluminescence of Doped Organic Thin Films”, by C. W. Tang, et al., Journal of Applied Physics 65 (9) May 1, 1989, pp. 3610-3616.
“Electroluminescence In Organic Films with Three-Layer Structure”, by Chihaya Adachi et a., Japanese Journal of Applied Physics, vol. 27, No. 2, Feb., 1988, pp. L269-L271.

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