Positive Negative Arrays of Organic Light Emitting Diodes by a Surface Tension driven approach

A surface-tension-driven technique to pattern molecular arrays of organic light-emitting diodes by using a metallic grid to induce the geometrical confinement was presented. The technique enables the controlled replication of the micrometer-scale template, allowing the fabrication of arrays of OLED pixels of a well-defined geometry. The principle of this approach is the controlled dewetting of the molecular compounds in the feature of the template, allowing to realize either negative or positive patterns. The molecular TPD-patterned layer was realized by taking advantage of the combination of both liquid instability, following the dewetting phenomena, and geometrical confinement, induced by a template mesh