한국정보디스플레이학회:학술대회논문집

한국정보디스플레이학회 (The Korean Infomation Display Society)
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Synthesis and Characterization of Poly(9,9-dioctylfluorene-2,7-vinylene) for Light Emitting Diode Application

  • Jin, Sung-Ho (Department of Chemistry Education Pusan National University) ;
  • Park, Hye-Jin (Department of Chemistry Education Pusan National University) ;
  • Kim, Jin-Young (Department of Physics, Pusan National University) ;
  • Lee, Kwang-Hee (Department of Physics, Pusan National University) ;
  • Gal, Yeong-Soon (Polymer Chemistry Lab, College of General Education, Kyungil University)
  • 발행 : 2002.08.21
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초록

Fluorenevinylene-based EL polymers, poly(9,9-dioctylfluorene-2,7-vinylene) (PFV) and poly[(9,9-dioctylfluorene-2,7-vinylene)-co-{2-methoxy-5-(2 ethylhexyloxy)-1,4-phenylenevinylene}] (PFV-co-MEH-PPV), have been synthesized by Gilch polymerization method. The resulting polymers were soluble in common organic solvents and easily spin cast onto the indium-tin oxide (ITO) substrate. The weight average molecular weight and polydispersity of PFV and PFV-co-MEH-PPV were in the range of 22.2 - 43.2 x $10^4$ and 1.9 - 3.0, respectively. Double-layer light-emitting diodes with ITO/PEDOT/Polymer/Al configuration were fabricated. PFV-co-MEH-PPV showed better EL properties than those of PFV and MEH-PPV The turn-on voltage of poly(9,9dialkylfluorene) derivatives were dramatically decreased to the 2.5 V compared to fluorene-based EL polymers. The maximum brightness and luminescence efficiency were up 7 to 1350 cd/$m^2$ and 0.51 Cd/A.

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