Abstract: An organic light-emitting device, comprising: a substrate; a first conductive layer formed over the substrate; at least one layer of a light-emissive organic material formed over the first conductive layer; a barrier layer formed over the at least one organic layer which acts to protect the at least one layer of organic material; and a second conductive layer, preferably a patterned sputtered layer, formed over the barrier layer.

Abstract: An optical device comprising an anode, a cathode, an organic semiconducting material between the anode and the cathode, and an electron transport layer between the cathode and the organic semiconducting material wherein the organic semiconducting material comprises sulfur and the electron transport layer containing barium.

Abstract: A method for forming a conjugated polymer which is doped by a dopant includes the steps of (a) adding a doping agent comprising a dopant moiety to a solution containing the conjugated polymer or a precursor thereof and, optionally, a second polymer, the dopant moiety being capable of bonding to the conjugated polymer, precursor thereof or the second polymer; (b) allowing the dopant moiety to bond to the conjugated polymer, precursor thereof or the second polymer to perform doping of the conjugated polymer, wherein the amount of doping agent added in step (a) is less than the amount required to form a fully doped conjugated polymer.

Abstract: Optical devices fabricated from solvent processible polymers suffer from susceptibility to solvents and morphological changes. A semiconductive polymer capable of luminescence in an optical device is provided. The polymer comprises a luminescent film-forming solvent processible polymer which contains cross-linking so as to increase its molar mass and to resist solvent dissolution, the cross-linking being such that the polymer retains semiconductive and luminescent properties.

Abstract: An organic electroluminescent device comprising: a substrate; a first electrode disposed over the substrate for injecting charge of a first polarity into an organic light emitting layer; a second electrode disposed over the first electrode for injecting charge of a second polarity opposite to said first polarity into an light emitting layer; an organic light emitting layer disposed between the first and the second electrodes forming a pixel array having a pixel pitch P; and an encapsulant disposed over the second electrode, wherein the second electrode is transparent to light emitted by the organic light emitting layer and an optical structure is provided in the encapsulant, said second electrode and said encapsulant being of a whereby the optical structure is a distance D from the light emitting layer, the distance D being less than half the pixel pitch P.

Abstract: A method for making a polymer containing a first repeat unit having formula: —Ar—N(R)—Ar(N(R?)—Ar)x— which may be substituted or unsubstituted where x or 0 or 1; each Ar is the same or different and independently is a substituted or unsubstituted aryl or heteroaryl group and R and R? each is hydrogen or a substituent group and a second repeat unit that is the same or different from the first repeat unit and comprises a substituted or unsubstituted, aryl or heteroaryl group.

Abstract: Monomers having the formula X1—Ar1-[triarylamine]—Ar2-X2 wherein the triarylamine unit comprises at least one nitrogen atom in the backbone of the monomer and at least three substituted or unsubstituted aryl or heteroaryl groups and wherein X1 and X2 are the same or different polymerizable groups and wherein Ar1 and Ar2 are the same or different substituted or unsubstituted aryl or heteroaryl groups. Polymers and copolymers comprising such monomers are also described. The polymers have particular application in organic optoelectronic devices such as organic electroluminescent devices and organic photovoltaic devices.

Abstract: A luminescent polymer comprising a triarylene repeat unit which comprises a triarylene of general formula (I) which is substituted or unsubstituted and an arylene repeat unit -[-Ar-]- that is different from the triarylene repeat unit wherein X, Y, and Z are each independently O, S, CR2, SiR2 or NR and each R is independently alkyl, aryl or H.

Abstract: A method for preparing an organic electronic or optoelectronic device is described. The method comprises depositing a layer of fluorinated polymer on a substrate, patterning the layer of fluorinated polymer to form a relief pattern and depositing from solution a layer of organic semiconductive or conductive material on the substrate. The fluorinated polymer may be a fluorinated photoresist and may be treated by exposure to ultraviolet light and ozone prior to the deposition of the layer of organic semiconductive or conductive material. The method has particular application in the preparation of organic light emitting devices by ink-jet printing.

Abstract: This disclosure generally relates to improved structures for organic light emitting diodes (OLEDs), and more particularly to so-called top emitting OLEDs.

Abstract: An organic light emitting diode (OLED) device having at least one pixel, comprising a planar light coupling layer having a front surface and a back surface, said layer having a thickness T; a light emitting portion for each pixel, disposed on the back surface of the light coupling layer; and a microlens for each pixel, having a radius of curvature R, disposed on the front surface of the light coupling layer such that its center of curvature is within the light coupling layer, wherein the radius of curvature R and the thickness T are such that R=xT, where x has a value in the range from 0.2 to 0.8. The OLED device exhibits improved light emission through the use of the microlenses, formed in or attached to the light coupling layer, when so configured that the radius of curvature (R) to substrate thickness (T) ratio (R/T) is in the range from 0.2 to 0.8, preferably in the range from 0.45 to 0.6.

Abstract: A light-emissive display comprising a substrate, a first electrode layer disposed over the substrate, a light-emissive layer disposed over the first electrode layer, and a second electrode layer disposed over the light-emissive layer, wherein the light-emissive layer is patterned to provide a plurality of discrete light-emissive regions, each discrete light-emissive region being a pixel, or a sub-pixel, of the light-emissive display, and wherein the first electrode layer and/or the second electrode layer comprises a plurality of electrodes, each electrode comprising at least two sub-electrodes associated with each discrete light-emissive region.

Abstract: A method for forming a conjugated polymer which is doped by a dopant includes the steps of (a) adding a doping agent comprising a dopant moiety to a solution containing the conjugated polymer or a precursor thereof and, optionally, a second polymer, the dopant moiety being capable of bonding to the conjugated polymer, precursor thereof or the second polymer; (b) allowing the dopant moiety to bond to the conjugated polymer, precursor thereof or the second polymer to perform doping of the conjugated polymer, wherein the amount of doping agent added in step (a) is less than the amount required to form a fully doped conjugated polymer.

Abstract: An organic light emitting diode (OLED) display device is described, the display device having a plurality of pixels each comprising at least two sub-pixels of different types, a first sub-pixel type comprising an OLED device including a first type of OLED material and a second sub-pixel type comprising an OLED device including a second type of OLED material, and wherein at least one of said first and second types of sub-pixel comprises a plurality of series-connected OLED devices. Employing series-connected sub-pixels where different types of OLED material are used for a display such as a color, active matrix OLED display facilitates balancing sub-pixel drive voltages and hence enables the production of display devices with improved efficiency.

Abstract: A light-emissive device including first and second electrodes, and a light-emissive layer located between the electrodes and containing organic light-emissive material including a plurality of particles spaced from each other by the light-emissive material, at least some of the particles being capable of injecting positive charge carriers into the light-emissive material and at least some of the particles being capable of injecting negative charge carriers into the light-emissive material; whereby electrical charge may pass between the electrodes via at least some of the particles to cause light to be emitted by the light-emissive material between those particles.

Abstract: A method of forming an electroluminescent device including the steps of providing a substrate including a first electrode for injection of charge carriers of a first type, forming a semiconductor region by depositing over the substrate a composition containing a first material for transporting charge carriers of the first type and a second material for emission and transporting charge carriers of the first type, and depositing over the semiconducting region a second electrode for injection of charge carriers of a second type.

Abstract: An organic light-emitting device comprising a light-emissive organic layer interposed between first and second electrodes for injecting charge carriers into the light-emissive organic layer, at least one of said first and second electrodes comprising a plurality of layers including a first electrode layer having a high resistance adjacent the surface of the light-emissive organic layer remote from the other of the first and second electrodes, said first electrode layer comprising a high-resistance material selected from the group consisting of a mixture of a semiconductor material with an insulator material, a mixture of a semiconductor material with a conductor material and a mixture of an insulator material with a conductor material.

Abstract: An organic optoelectrical device comprising: a substrate; at least one first electrode disposed over the substrate; a layer of bank material disposed over the first electrode and defining a plurality of wells; a layer of organic semi-conductive material disposed in the wells; at least one second electrode disposed over the layer of organic semi-conductive material in the wells; an encapsulant disposed over the at least one second electrode; a layer of the bank material provided at a periphery of the device; and a metallic seal adhering the encapsulant to the layer of bank material at the periphery of the device, the bank material being an inorganic electrically insulating material whereby the substrate, the bank material, the metallic seal and the encapsulant form a seal at the periphery of the device.

Abstract: A polymer blend comprising a first, light-emissive polymer comprising substituted or non-substituted units according to formulae (I) and (II) and a second, hole transport polymer comprising substituted or non-substituted fluorene units according to formula (I) and substituted or non-substituted triarylamine units, wherein the molecular weights of the first and second polymers and the blending ratio of the first and second polymers are selected such that, in use in a light-emissive device, the luminance of the emitted light at a bias of 5V is no less than 20,000 cd/m2. wherein R? is independently in each occurrence H, C1-C20 hydrocarbyl or C1-C20 hydrocarbyl containing one or more S, N, O, P or Si atoms, C4-C16 hydrocarbyl carbonyloxy, C4-C16 aryl(trialkylsiloxy) or both R? may form together with the 9-carbon on the fluorene ring a C5-C20 cycloaliphatic structure containing one or more heteroatoms of S, N or O.

Abstract: Display driver circuitry for electro-optic displays, in particular active matrix displays using organic light emitting diodes. The circuitry includes a driver to drive an electro-optic display element in accordance with a drive voltage, a photosensitive device optically coupled to the electro-optic display element to pass a current dependent upon illumination reaching photosensitive device, a control circuit having a control line coupled to the driver to control the brightness of the electro-optic display element and having a current sense input coupled to the photosensitive device, a current set line for coupling to a reference current generator, and a display element select line to, when active, cause the control circuit to drive the electro-optic display element in accordance with the current set by the reference current generator. The circuit provides improved control of an electro-display element such as an organic LED pixel.