Wang, H.; Amsalem, P.; Heimel, G.; Salzmann, I.; Koch, N.; Oehzelt, M.: Band-Bending in Organic Semiconductors: the Role of Alkali-Halide Interlayers. Advanced Materials 26 (2014), p. 925-930

Band-bending in organic semiconductors, occurring at metal/alkali-halide cathodes in organic-electronic devices, is experimentally revealed and electrostatically modeled. Metal-to-organic charge transfer through the insulator, rather than doping of the organic by alkali-metal ions, is identified as the origin of the observed band-bending, which is in contrast to the localized interface dipole occurring without the insulating buffer layer.