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Optical absorbance of the interlayers formed on PEDOT.
(a) current, (b) luminance, and (c) EL efficiency of the devices with the interlayers formed with the identified polymers as a function of the applied voltage, compared with those of the reference device, ITO/PEDOT/MEH-PPV/Al, with “no” interlayer formed.
Frontier levels energy (ionization potentials—lower levels, and electron affinity) of the materials used in the fabrication of the devices.
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