Abstract: A polymer including a region having a conjugated backbone capable of transporting negative charge carriers, which region includes a plurality of repeat units each including a core group which includes an [Ar?] group substituted with at least one pendant group X and the [Ar?] groups form at least a part of the backbone, wherein each Ar? includes an aromatic or heteroaromatic group and each X includes NAr2 in which each Ar is the same or different and independently includes a substituted or unsubstituted aromatic or heteroaromatic group and N is conjugated with the backbone.

Abstract: An organic polymer having a plurality of regions along the length of the polymer backbone and comprising two or more of the following a first region for transporting negative charge carriers and having a first bandgap defined by a first LUMO level and a first HOMO level; and a second region for transporting positive charge carriers and having a second bandgap defined by a second LUMO level and a second HOMO level; and a third region for accepting and combining positive and negative charge carriers to generate light and having a third bandgap defined by a third LUMO level and a third HOMO level, wherein each region comprises one or more monomers and the quantity arrangement of the monomers in the organic polymer is selected so that the first, second and third bandgaps are distinct from one another in the polymer.

Abstract: A polymer comprising a region having a conjugated backbone capable of transporting negative charge carriers, which region comprises a plurality of repeat units each comprising a core group which comprises an [Ar′] group substituted with at least one pendant group X and the [Ar′] groups form at least a part of the backbone, wherein each Ar′ comprises an aromatic or heteroaromatic group and each X comprises NAr2 in which each Ar is the same or different and independently comprises a substituted or unsubstituted aromatic or heteroaromatic group and N is conjugated with the backbone.

Abstract: An electroluminescent device comprising: a first charge-carrier injecting layer for injecting positive charge carriers and a second charge-carrier injecting layer for injecting negative charge carriers, at least one of the charge-carrier injecting layers being patterned so as to comprise spaced-apart charge-injecting regions; an organic light-emitting layer located between the first and second charge-carrier injecting layers; and an unpatterned conductive polymer layer located between the organic light-emitting layer and the patterned charge-carrier injecting layer, the resistivity of the conductive polymer layer being sufficiently low to allow charge carriers to flow through it from the charge-injecting regions to generate light in the organic light-emitting layer but sufficiently high to resist lateral spreading of charge carriers beyond the charge-injecting regions.

Abstract: An electroluminescent device comprising: a first charge-carrier injecting layer for injecting positive charge carriers and a second charge-carrier injecting layer for injecting negative charge carriers, at least one of the charge-carrier injecting layers being patterned so as to comprise spaced-apart charge-injecting regions; an organic light-emitting layer located between the first and second charge-carrier injecting layers; and an unpatterned conductive polymer layer located between the organic light-emitting layer and the patterned charge-carrier injecting layer, the resistivity of the conductive polymer layer being sufficiently low to allow charge carriers to flow through it from the charge-injecting regions to generate light in the organic light-emitting layer but sufficiently high to resist lateral spreading of charge carriers beyond the charge-injecting regions.

Abstract: An electroluminescent device comprising: a first charge-carrier injecting layer for injecting positive charge carriers and a second charge-carrier injecting layer for injecting negative charge carriers, at least one of the charge-carrier injecting layers being patterned so as to comprise spaced-apart charge-injecting regions; an organic light-emitting layer located between the first and second charge-carrier injecting layers; and an unpatterned conductive polymer layer located between the organic light-emitting layer and the patterned charge-carrier injecting layer, the resistivity of the conductive polymer layer being sufficiently low to allow charge carriers to flow through it from the charge-injecting regions to generate light in the organic light-emitting layer but sufficiently high to resist lateral spreading of charge carriers beyond the charge-injecting regions.

Abstract: A curable silane functionalized resin for casting and splinting materials comprising a flexible substrate carrying the resin. The resin is based upon a prepolymer made by nucleophilic addition reactions where at least one reagent is terminated with an alkylenesilane.