| 초록 |
We have synthesized various semiconducting polymers which can emit RGB colors as well as white color by controlling the polymer structures and by differentiating counter monomers. And their optical, electrochemical, photoluminescence and electroluminescence properties will be presented. In the past few years, semiconducting conjugated polymers have attracted much scientific and technological interest due to their potential applications in organic light-emitting diodes, thin-film transistors and photovoltaic cells. In this seminar, many synthetic procedures of PPV-based polymers, fluorene-based polymers and thiophene-based polymer materials will be introduced, and also light-emitting properties, thin-film transistor and photovoltaic cell device characteristics will be discussed. Especially, we have developed blue-emitting polyfluorene-based polymers which is containing siloxane and POSS-unit to prevent excimer emission, and green-emitting polyfluorene copolymers by using fused thiophene comonomer, and red-emitting polyfluorene copolymers containing benzothiadiazole or phenothiazine moieties as narrow band-gap counter parts. We have also developed white-emitting 3-component and 2-component copolymer systems by controlling their monomer feed ratios. Finally, thiophene-based polymers prepared by oxidative one-pot synthesis and their transistor device characteristics will be presented. In case of photovoltaic research, fused thiophene-based polymers and Tips-anthracene copolymers showed high power conversion efficiency in polymer solar cell devices. |
