Abstract :
Poly(N-vinylcarbazole) (PVCz) is well
known as an electroactive material due to its good
photoconductivity, charge-transfer complexes, photoluminescence
and electroluminescence properties. The
block copolymers of N-vinylcarbazole were prepared
and the effects of the relative composition, molar
masses, architecture and doping on its electrical
behavior were investigated. Controlled free radical
polymerization has been carried out using nitroxidemediated
process in order to prepare a series of block
copolymers of N-vinylcarbazole. 2,2,6,6-Tetramethyl-
1-piperidinyloxy radical (TEMPO) was used to endcap
‘‘living’’ homopolymer of p-bromostyrene, which
was further used as a macroinitiator to polymerize
N-vinylcarbazole and styrene. The copolymers have
been doped at room temperature with LiClO4 and the
electrical conductivities were measured by two-probe
method, which have shown to depend on copolymer’s
relative composition and molar masses.
