摘要 |
<p>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.</p> |
申请人 |
POLAROID CORP., CAMBRIDGE, MASS., US |
发明人 |
CUMMING, WILLIAM, J., NORTH CHELMSFORD, MA 01863, US;GAUDIANA, RUSSELL, A., MERRIMACK, NH 03054, US;INGWALL, RICHARD, T., NEWTON, MA 02165, US;KOLB, ERIC, S., IPSWICH, MA 01938, US;PETERSEN, CHERYL, P., ACTON, MA 01720, US |