White light emission from a polymer blend light emitting diode

DOI PDF 10 Citations
  • Magnus Granström
    Laboratory of Applied Physics, Department of Physics and Measurement Technology (IFM), Linköping University, S-581 83 Linköping, Sweden
  • Olle Inganäs
    Laboratory of Applied Physics, Department of Physics and Measurement Technology (IFM), Linköping University, S-581 83 Linköping, Sweden

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<jats:p>A new type of polymer light emitting diodes that emit white light is reported. In these diodes, several electroluminescent substituted polythiophenes have been combined to give the necessary components of the visible spectrum. These emitting polymers are then mixed with an insulating polymer to diminish the energy transfer from high-band-gap polymers to low-band-gap polymers. The resulting emission at 20 V is shown to be close to the equienergy white point as defined by the CIE (Commission Internationale de l’Eclairage).</jats:p>

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