Subject PEDOT

Other materials were found to be very efficient if introduced between the ITO and the active layer. Many authors [118, 119] reported that poly(3,4-ethylenedioxythiophene) (PEDOT), mixed with polystyrene sulfonated acid, PSSA, (Figure 5.9) has a meaningful effect both on the lifetime and in the EL efficiency if spin coated between ITO and the active polymeric layer. Very recently this subject has been studied by means of the ultraviolet photoelectron spectroscopy (UPS) technique [37]. 

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