Polyethylenedioxythiophene PEDOT

At the ITO interface, various conducting polymers have been introduced between the luminescent polymer and the ITO. These include polyaniline56 and polyethylenedioxythiophene (PEDOT) (Fig. 5.13).37 There are several potential benefits from this approach, including the smoothing out of surface features on the ITO which may lead to short-circuits, the possibility of dopants from the con-... 

Cogan SF, Peramunage D, Smirnov A et al (2(X)7) Polyethylenedioxythiophene (PEDOT) coatings for neural stimulation and recording electrodes. Mater Res Soc Meet, (Abstr. QQ2.7), Nov. 26-30, 2007, Boston... 

These cells do not rely on a traditional p-n junction to separate photo-generated charge carriers. Polymer cell materials used include polyester (PET) foil, indium tin oxide (ITO) film, polyethylenedioxythiophene (PEDOT), and aluminum. Nanocrystalline cells use thin film materials and are overlayed on a supporting matrix of conductive polymer or mesoporous metal oxide. 

A thin layer deposited between the electrode and the charge transport material can be used to modify the injection process. Some of these arc (relatively poor) conductors and should be viewed as electrode materials in their own right, for example the polymers polyaniline (PAni) [81-83] and polyethylenedioxythiophene (PEDT or PEDOT) [83, 841 heavily doped with anions to be intrinsically conducting. They have work functions of approximately 5.0 cV [75] and therefore are used as anode materials, typically on top of 1TO, which is present to provide lateral conductivity. Thin layers of transition metal oxide on ITO have also been shown [74J to have better injection properties than ITO itself. Again these materials (oxides of ruthenium, molybdenum or vanadium) have high work functions, but because of their low conductivity cannot be used alone as the electrode. 

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