Color tunable conductive vinyl copolymers for OLED applications
2007
A number of novel vinyl monomers containing either a fluorescent or a phosphorescent moiety were synthesized. The vinyl
monomers have either hole or electron transporting properties and luminescence in near-UV, blue, green, to red. The overall
charge transport properties and emission hue can be tuned by applying and the various monomers at different mix ratios.
The vinyl monomers were copolymerized into high molecular weight yet soluble conductive copolymers using traditional
solution free radical polymerization method. The vinyl monomers prepared including electron transporting
11-vinyl-phenanthro[9.10-b]quinoxaline (QP) and 1-vinyl pyrene (PY), hole transporting
9-(4-methoxyphenyl)-3-vinyl-9H-carbazole (KPA) and N-phenyl-N-(4-vinylphenyl) naphthalene -1-amine (NPA), and a
red-emitting phosphorescent monomer based on the Europiujm complex [Eu(DBM) 3 H-EtPIP]. The optical, thermal and
electrical properties of the copolymers were characterized. Homojunction OLED based on the copolymers were prepared
by spin-coating. The EL spectra and I-V-L characteristics were obtained and will be reported.
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