Late-News Poster: Auto-layered Organic Film Deposition by Substrate Temperature Tuning for Efficiency-enhanced OLED

摘要

This paper reports on the effect of substrate temperature during the evaporation process of a light-emitting material on resultant OLED. Light-emitting diodes are based on a novel bis-imido-phenylene vinylene (ImPV) derivative as green-emitting molecule. It is reported that the substrate temperature have a great influence on thin film morphology. Heating the substrate implies a more ordered film. Using this technique, molecules of ImPV self-organized in an even layered film with molecular layers of 1.7 nm-thick. Devices based on heated substrates exhibit higher operating voltages and enhanced quantum and luminous efficiencies.