| 초록 |
A series of copolymers, poly{9,9-bis(2’-ethylhexyl)fluorene-2,7-diyl-co-[aza(2,7-dibromofluorene-9-ylidene)methyl]diphenylamine} poly(EHF-co-FDPA)s were synthesized from the monomers, 2,7-dibromo-9,9-bis(2’-ethylhexyl)fluorene (EHF) and [aza(2,7-dibromofluorene-9-ylidene)methyl]diphenylamine (FDPA) through the Ni(0) mediated polymerization. The copolymers were characterized using FT-IR spectroscopy, UV-vis spectroscopy, TGA, photoluminescence (PL) & electroluminescence (EL) spectroscopy, elemental analysis, and molecular weight studies. All the synthesized copolymers showed their absorption maximum at about 380 nm. In PL, the emission maxima of the copolymers were red-shifted as the fraction of FDPA increases, despite the copolymers showing little variation in UV-vis absorption characteristics. Light-emitting devices were fabricated in an ITO (indium-tin oxide) /PEDOT/polymer/Ca/Al configuration. Synthesis and light-emitting properties of the poly(EHF-co-FDPA)s will be presented. |
