Electroluminescent device comprising a transparent structured el

Details Electroluminescent device comprising a transparent structured el Electroluminescent device comprising a transparent structured el

1997-07-11

1999-11-16

Patel, Ashok

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

313504, 313505, H05B 3302

Patent

active

059864001

ABSTRACT:
A description is given of an electroluminescent (EL) device (1) composed of polymeric LEDs comprising an active layer (7) of a conjugated polymer and a transparent polymeric electrode layer (5) having electroconductive areas (51) as electrodes. Like the active layer (7), the electrode layer (5) can be manufactured in a simple manner by spin coating. The electrode layer (5) is structured into conductive electrodes (51) by exposure to UV light. The electrodes (9) and (51) jointly form a matrix of LEDs for a display. When a flexible substrate (3) is used, a very bendable EL device is obtained.

REFERENCES:
J. C. Guatafason et al, "In situ spectroscopic investigations of electrocromics and ion tranport in a poly (3,4-athylenedioxythiphene) electrode in a solid state electrochemical cell", Solid State Ionics, 1994, pp. 145-152.
G. Gustafsson et al, "Flexible light-emitting diodes made from soluble conducting polymers", Nature, vol. 357, Jun. 11, 1992, pp. 477-479.
D. Braun, et al, "Photo and electroluminescence efficiency in poly(dialkoxy-p-phenylemenlmylene", Synthetic Metals, 1994, pp. 75-79.
E. Staring et al, Photo and Electroluminscence Efficiecy in Soluble Poly(dialkyl-p-phenyleneyimylene), Adanced Materials, 1994, 6 No. 12, pp. 934-937.

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