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October 22, 2009
Functional Polymers: Poly(carbazole)-Based Copolymers for PLED Applications
Jin Su Park, Myungkwan Song, Sung-Ho Jin,* Jae Wook Lee,* Chan Woo Lee, and Yeong-Soon Gal
Polymer light-emitting diodes (PLEDs) exhibit many attractive properties, such as low driving voltage, a wide color range, low costs, flexibility and easy processing conditions. Among the π-conjugated polymers used for the production of PLEDs polymers containing carbazole or carbazole derivatives have attracted much attention due to their unique optical, electrical and chemical properties. J.-H. Jin, J. W. Lee and coworkers have synthesized a series of new carbazole-based π-conjugated copolymers incorporating a deep blue chromophore pendant group using the Suzuki coupling polymerization method. The resulting copolymers were found to be stable in air, and showed good solubility and high glass transition temperatures. This indicates that these copolymers are promising light-emitting materials. The maximum brightness and luminescence efficiency of the copolymer device were found to be 230 cd⋅m–2 and 0.28 cd⋅A–1 at 11V, respectively.
Macromol. Chem. Phys., DOI: 10.1002/macp.200900207
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