Comparison of spin and blade coating methods in solution-process for organic light-emitting devices

Abstract

We compared solution-based spin and blade coating methods in fabrication of organic light-emitting devices (OLEDs). The effect of F8BT film morphology, prepared by two different methods, on device performances was studied in detail. The film morphology and molecular packing arrangement of the F8BT films were investigated by atomic force microscopy (AFM), X-ray reflectivity (XRR), and X-ray diffraction (XRD). We found that the device performances are dependent on evaporation condition of solvent during the formation of the organic layer.