Abstract: A method for the manufacture of an organic light-emissive display comprises: providing a substrate comprising a first electrode layer and a bank structure defining a plurality of wells; depositing a conductive organic layer over the first electrode; depositing an organic light-emissive layer over the conductive organic layer; and depositing a second electrode over the organic light-emissive layer, wherein the conductive organic layer is deposited by ink jet printing a composition comprising poly(ethylene dioxythiophene) (PEDOT) doped with a polyanion, wherein the polyanion has a molecular weight of equal to or less than 30 kDa measured relative to polystyrene molecular weight standards using gel-permeation chromatography, the viscosity of the composition being equal to or less than 10 mPa·s, and the solids content of the composition being equal to or less than 5 wt % based on the volume of the composition. The composition may include an optional solvent or other additive.

Abstract: An improved composition for ink jet printing an opto-electrical device, which composition comprises a solution-processable host material and a metal complex, wherein the viscosity of the composition exceeds 12 mPa·s at 20° C.

Abstract: A composition suitable for fabricating an electronic device such as an OLED using an ink-jet printing technique comprises a conducting or semi-conducting organic material and a solvent, the solvent having a boiling point of greater than 250° C. and a viscosity of less than 5 cPs. The composition preferably has a viscosity in the range between 0.1 and 20 cPs, and the solvent preferably has the formula: where R represents a C6 to C11 alkyl. The high boiling point of the solvent allows the “ink” to remain wet for a longer time after printing. This provides better process control during drying, resulting in more uniform films and greater control over the film profile. The low viscosity of the solvent enables jetting of the composition at high frequencies.

Abstract: A composition for use in the manufacture of an opto-electrical device, the composition comprising: a conductive or semi-conductive organic material; a solvent; and a first additive, wherein the first additive is an alcohol ether having a boiling point lower than 170° C.

Abstract: A method of fabricating an opto-electrical device, the method comprising the steps: depositing, on a substrate comprising a first electrode for injecting charge carriers of a first polarity, a composition comprising a conductive or semi-conductive organic material, a solvent, and a first additive; and, depositing a second electrode for injecting charge carriers of a second polarity opposite to the first polarity, wherein the first additive is a basic additive.

Abstract: A radio receiver is selectively operable in a current mode or a voltage mode according to conditions prevailing within a wireless environment. If the signal levels within the wireless environment are relatively low, the radio receiver is operable in current mode. If the signal levels within the wireless environment are relatively high, the radio receiver is operable in voltage mode. The radio receiver is switchable between current and voltage mode of operation via selectively actuable switches that bringing into effect or remove from effect corresponding resistances.