Electroluminescent devices comprising polymers, and processes fo

Details Electroluminescent devices comprising polymers, and processes fo Electroluminescent devices comprising polymers, and processes fo

1993-05-13

1994-12-27

Ryan, Patrick J.

Stock material or miscellaneous articles

Composite

Of metal

428917, 313504, 25230134, 25230135, B32B 900

Patent

active

053764560

ABSTRACT:
Electroluminescent devices have, as the active layer, a polymer having a chain comprising a plurality of electroluminescent groupings, adjacent pairs of the electroluminescent groupings being connected via two benzene rings linked by only a single covalent bond, at least one of the benzene rings bearing, at a position ortho to the covalent bond, a substituent of sufficient size that the two benzene rings are essentially not conjugated with each other. Preferred electroluminescent groupings comprise a chain of three or more para-phenylene groups connected to one another by amide, carboxy, ester, urea, urethane or vinyl groups. The polymers have a fixed conjugation length with predictable electroluminescent properties.

REFERENCES:
patent: 3621321 (1971-11-01), Williams et al.
patent: 4356429 (1982-11-01), Tang
patent: 4446305 (1984-05-01), Rogers et al.
patent: 5231329 (1993-07-01), Nishikitani et al.
Microelectronic Manufacturing and Testing 1985 Desk Manual vol. 8, No. 3, p. 59.
Grant & Hackh's Chemical Dictionary, 1993, 5th Ed. p. 151.
Ohmori et al. "Blue Electroluminescent Diodes Utilizing Poly(alkylfluorene)" Jap. J. Appl. Phys. 30(11B), 21941-21943 (1991).

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