Abstract: Charge transport enhancement layers and structures are provided that may improve the performance of organic devices, specifically organic light emitting devices. A charge transport enhancement layer may include a layer or an inorganic material, metal oxide, halide, and/or alkali disposed between two organic layers, and separated from the cathode by an intervening organic layer. One or more CTELs may be used, such as in an alternating stack of organic and CTEL layers. Surprisingly, it has been found that the use of one or more CTELs arranged in a stack with intervening organic layers may improve the performance of the device even where the layer is not directly adjacent to the cathode.

Abstract: Organic devices comprising an organic layer, wherein the organic layer comprises: (a) a host material formed of a covalently cross-linked matrix comprising an organic charge transport material, and (b) a dopant. The charge transport material has reactive groups for forming cross-links. The cross-linked matrix may allow the organic layer to be solvent resistant. The dopant may protect the cross-linked matrix from electrochemical degradation. The dopant may be a charge acceptor and/or capable of forming covalent bonds with free reactive groups on the cross-linked charge transport material.