Electron Transport in 1,3-Bis(dicyanomethylene)indans

Upon investigation of the photoconductive properties of polycarbonate doped with 1,3-bis(dicyanomethylene)indans, a large, temperature independent quantum yield for charge generation was observed. The field and temperature dependence of the charge carrier mobility could be analyzed in the framework of the disorder model, developed by Bassler et al. The prefactor mobility was found to be of the same order of magnitude as that observed for hole transport materials with a comparable dipole moment. In the framework of the used disorder model, this relationship would suggest a dependence of the wave function decay constant on the molecular dipole moment. This would result in a material dependence of the prefactor mobility, which has also been found for other charge transport molecules.