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Poly(p-phenylene vinylene)
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<p>Poly(<i>p</i>-phenylene vinylene) (PPV, or polyphenylene vinylene) is a <a href="/facts/Conducting_polymers/JbwFx9IL">conducting polymer</a> of the rigid-rod polymer family. PPV is the only polymer of this type that can be processed into a highly ordered crystalline thin film. PPV and its derivatives are electrically conducting upon doping. Although insoluble in water, its precursors can be manipulated in aqueous solution. The small optical band gap and its bright yellow fluorescence makes PPV a candidate in applications such as light-emitting diodes (LED) and photovoltaic devices. Moreover, PPV can be doped to form electrically conductive materials. Its physical and electronic properties can be altered by the inclusion of functional side groups. </p>