Electronegativity model, metal/organic

Electronegativity Model for Barrier Formation at Metal/Organic... 

The electronegativity model has been used successfully on metal/organic semiconductor interfaces, and shown to give a satisfactory description of the interface barrier formation. As electronegativity is defined only for elements it is of interest to investigate if the electronegativity model can be extended to compound electrodes such as indium tin oxide (ITO), which... 

Now it is clear why sums of covalent radii cannot represent adequately the variety of polar bonds. Optimizing the radii can only tune the system to a certain range of polarities. The r values will vary depending on the choice of the reference structures and the optimization procedure, especially when metal atoms (with low ENs) are involved. Thus, Slater s atomic radii of the most electronegative elements (F, O, N) are underestimated. However, a simple additive model can work where all atoms happen to be of similar EN, as in many organic molecules. 

---