W. Chang, W. Whang, Ping-Way Lin
Apr 1, 1996
Citations
0
Influential Citations
25
Citations
Journal
Polymer
Abstract
Abstract Poly(phenylene vinylene) (PPV) has been prepared successfully from p -xylylenebis(triphenylphosphonium bromide) in acetonitrile solution via an electroreduction polymerization. p -Xylylenebis(triphenylphosphonium bromide) also acted as an electrolyte in the solution. The resultant electropolymerized PPV film was transparent and dense, and had considerable adhesion to an indium tin oxide (ITO) electrode. The electropolymerized PPV showed a blue shift both in the ultraviolet-visible absorption spectrum and photoluminescence, compared with the PPV prepared from a p -xylylenebis(tetrahydrothiophenium chloride) precursor route, indicating that it has a shorter π-conjugated chain length. The infra-red absorption spectra showed a stable PC bond on the electropolymerized PPV chain. The Al/electropolymerized PPV/ITO light-emitting diode emitted green light with an emission maximum at 530 nm. Annealing the electroluminescence device in a high vacuum oven at 160°C for 3 h significantly enhanced the electroluminescence performance as a result of improvement of the interfacial contact between PPV and the Al metal electrode.