Electroluminescent devices comprising polymers

Details Electroluminescent devices comprising polymers Electroluminescent devices comprising polymers

H - Electricity

05

B

H05B 33/14 (2006.01) C08G 63/682 (2006.01) C08G 69/32 (2006.01) C09K 11/06 (2006.01)

Patent

CA 2159913

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.

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