| 摘要 |
A method of fabricating an organic light emitting device comprises patterning a first electrode layer to form a grid comprising a mesh of electrically conductive metal tracks, depositing a layer of hole injection material from a solution comprising less than 10% solids by weight in a solvent, the thickness of the wet layer of solution before the solvent is evaporated to dry the film being greater than the track spacing, evaporating the solvent to provide a dry film having an average thickness in the spacing between the tracks which is less than 10% of the wet thickness of the wet layer of solution and an average thickness in the spacing between the tracks which is greater than 25% of the track thickness to provide a more planar top surface than the surface of the metal tracks before the layer of hole injection material was deposited, depositing one or more further layers from solution to provide a light emitting layer and one or more optional charge transporting layers, and depositing a second electrode layer. The grid can comprise sets of tracks having different widths and spacings. |
