C 60 : Li F nanocomposite thin films were synthesized by physical vapor coevaporation. It is found that the nano-composite films are extremely conductive even at high LiF concentrations of up to 75wt% and that the films form Ohmic contacts with Al electrodes. IR measurements showed evidence of charge transfer from LiF to C60. Scanning electron microscope studies showed that C60:LiF (75wt%) nanocomposite forms uniform films. Compared with an archetypical tris(8-hydroxyquinolinato)alumina based device, OLEDs with the C60:LiF composite electron transport materials have lower driving voltages and higher power efficiencies.

Growth and thermal behavior of copper‐phthalocyanine (CuPc) and fullerene (C60) organic nanocomposite thin films, grown on SiO2 and Cu(111) surfaces, have been studied using scanning electron microscopy, X‐ray diffraction (XRD) and scanning tunneling microscopy (STM). It is found that the growth of pure CuPc organic thin films follows an island‐type growth mode. The island formation is found to be dramatically suppressed by the inclusion of C60 during deposition. XRD and STM studies reveal that the CuPc molecular packing is altered upon C60 inclusion, producing disordered CuPc–C60 interfaces. The ordered molecular stacking of CuPc is found to be disrupted completely when C60 concentration reaches 30 wt.%. The thermal stability of the CuPc thin film has been significantly improved upon C60 inclusion. It is suggested that the molecular diffusion kinetics rather than thermodynamics are responsible for the improved stability.