ELECTROLUMINESCENT NANOSTRUCTURES IN NEW POLYSTYRENE-OLIGO (PHENYLENE-VINYLENE) GRAFT COPOLYMER

We present a new electroactive polymer, the polystyrene-oligo(phenylen e-vinylene) (PS-OPV), in which nanostructured photoactive conjugated p henylene-vinylene segments are attached as sidechains to the polystyre ne backbone. The number of phenylene-rings of the OPV segments is very homogeneous (2-4 rings), as the UV/vis absorption and photoluminescen ce (lambda(max)=430nm) spectra compared to OPV oligomer spectra show. The photoluminescence quantum yield is very high. Electrochemical meas urements were used to determine the electronic structure of the conjug ated polymer. The PS-OPV was successfully used as a blue light emittin g layer in single and multilayer electroluminescence devices.