Long operating life for polymer light-emitting diodes

Details Long operating life for polymer light-emitting diodes Long operating life for polymer light-emitting diodes

1996-02-29

1998-08-25

Yamnitzky, Marie

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428209, 428457, 428690, 428704, 428917, 313503, 313504, 313505, 313506, 313510, 257 91, 257103, 427 66, 4274071, H05B 3300

Patent

active

057981701

ABSTRACT:
Long-lived organic light-emitting diodes are achieved by positioning a layer comprising polyaniline in the emeraldine salt form directly contiguous with the anode side of the active light-emitting layer. Particular advantages are achieved if the emeraldine salt-containing layer has a sheet resistance of at least about 10.sup.3 ohms per square which can be achieved by casting the layer from solution in a polar solvent, most particularly, DMSO. The LED's can find advantageous application in displays where they exhibit long life and marked resistance to blurring, spreading or other degradations over time.

REFERENCES:
patent: 5317169 (1994-05-01), Nakano et al.
patent: 5504323 (1996-04-01), Heeger et al.
patent: 5563424 (1996-10-01), Yang et al.
G. Gustafsson et al., "Flexible Light -emitting diodes made from soluble conducting polymers", Nature, vol. 357, pp. 477-479, Jun. 11, 1992.
Y. Yang et al., "Polyaniline as a transparent electrode for polymer light-emitting diodes: Lower operating voltage and higher efficiency", Appl. Phys. Lett., vol. 64, No. 10, pp. 1245-1247, Mar. 7, 1994.
Y. Yang et al., "Enhanced performance of polymer light-emitting diodes using high-surface area polyaniline network electrodes", J. Appl. Phys., vol. 77, No. 2, pp. 694-698, Jan. 15, 1995.

Affiliated with

Also associated with

Rating

Long operating life for polymer light-emitting diodes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Long operating life for polymer light-emitting diodes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Long operating life for polymer light-emitting diodes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-34931