Abstract: A display device comprises a plurality of electroluminescent display pixels and a plurality of semiconductor elements (“chiplets”), each pixel being electrically connected to the output of one or more of said semiconductor elements through a via hole in an electrically insulating layer for addressing the plurality of display pixels, and a plurality of colour filters and/or downconverters. The colour filters and/or downconverters and the semiconductor elements are provided on the same surface of the device.

Abstract: A process for manufacturing an electrical device, the process comprising the steps: providing a substrate; bringing a stamp into contact with the substrate whereby areas of the substrate contacted by the stamp have decreased wettability; and depositing a liquid comprising an electrically active material over areas of the substrate located between the areas of decreased wettability.

Abstract: An organic light emitting device having a phase-separated light-emissive layer comprising: a charge transport phase comprising a charge transport material; and an emitting phase, the emitting phase comprising a plurality of discrete emissive domains dispersed in the charge transport phase, each emitting domain comprising a host material and one or more metal complexes for emitting light by phosphorescence; wherein the charge transport material has a T1 energy level lower than the T1 energy level of the metal complexes and the host material has a T1 energy level higher than the T1 energy level of the metal complexes.

Abstract: A composition adapted for use in the manufacture of an organic light-emissive device by passing the composition through one or more openings under pressure to deposit the composition, the composition comprising: a semi-conductive organic host material; a luminescent metal complex; and a first solvent, wherein the first solvent has a structure: where X, X? independently comprise O, S or N and R, R? independently comprise an aromatic or aliphatic group.

Abstract: An organic light emissive device comprising: a first electrode; a second electrode; and an organic light emissive region between the first and second electrodes comprising an organic light emissive material which has a peak emission wavelength, wherein at least one of the electrodes is transparent and comprises a composite of a charge injecting metal and another material which is codepositable with the charge injecting metal, the other material having a different refractive index to that of the charge injecting metal and wherein the other material has a lower degree of quenching at the peak emission wavelength than the charge injecting metal whereby quenching of excitons by the at least one electrode is reduced, the charge injecting metal comprising either a low work function metal having a work function of no more than 3.5 eV or a high work function metal having a work function of no less than 4.5 eV.

Abstract: A method of manufacturing an electroluminescent device which has an anode and a cathode and arranged between the anode and the cathode a light emissive layer, also includes an anode protection layer which protects the anode against the effects of converting a precursor polymer to a semiconductive conjugated polymer which constitutes the light emissive layer. This has been found to increase the brightness and half-life of devices.

Abstract: An organic electroluminescent device comprising: a substrate; a first electrode disposed over the substrate for injecting charge of a first polarity; a second electrode disposed over the first electrode for injecting charge of a second polarity opposite to said first polarity; an organic light emitting layer disposed between the first and the second electrode, the second electrode being transparent to light emitted by the light emitting layer; and a transparent encapsulant disposed over the second electrode, wherein the transparent encapsulant comprises a microlens array formed by a top surface of the transparent encapsulant and a diffraction grating formed by a bottom surface of the transparent encapsulant.

Abstract: An organic electroluminescent device comprising: a substrate; a first electrode disposed over the substrate for injecting charge of a first polarity; a second electrode disposed over the first electrode for injecting charge of a second polarity opposite to said first polarity; an organic light emitting layer disposed between the first and the second electrode; an encapsulant can disposed over, and spaced apart from, the second electrode, defining a cavity therebetween; wherein a plurality of spacers are disposed between the encapsulant can and the second electrode forming multiple sealed cavities between the second electrode and the encapsulant can.

Abstract: A soluble oligomeric compound for forming an organic thin film transistor, has repeat units comprising two or more fused thiophene residues. The repeat units comprise the structure: The compound may include two or more terminating groups comprising solvating groups. A solution of the material can be used to form a thin film transistor by ink jet printing.

Abstract: This invention generally relates to display driver circuits for electro-optic displays, and more particularly relates to circuits and methods for reducing the re-emission of absorbed light, for example to increase the color gamut of organic light emitting diode displays. A driver for a display comprising a plurality of light emitting diode display elements, the driver comprising addressing circuitry to address said display elements, a first driver to cooperate with said address circuitry to provide a forward drive to at least one of said display elements to illuminate the display element, and a second driver to provide a reverse bias drive to others of said display elements at the same time as said at least one display element is illuminated to reduce a level of photoluminescence from said others of said display elements.

Abstract: A light-emissive device comprising: a light-emissive region (12); a first electrode (10) located on a viewing side of the light-emissive region for injecting charge carriers of a first type: and a second-electrode (11) located on a non-viewing side of the light-emissive region for injecting charge carriers of a second type; and wherein there is a reflectivity-influencing structure (13) located on the non-viewing side of the light-emissive region and including a light absorbent layer comprising graphite and/or a fluoride or oxide of a low work function metal.

Abstract: An active matrix organic optical device comprising a plurality of organic thin film transistors and a plurality of pixels disposed on a common substrate, wherein a common bank layer is provided for the organic thin film transistors and the pixels, the common bank layer defining a plurality of wells, wherein some of the wells contain the organic semiconducting material of the organic thin film transistors therein and others of the wells contain organic optically active material of the pixels therein.

Abstract: A method of fabricating an organic electronic device using ink jet printing in swathes, comprises depositing an ink into a first set of locations in a column in a first print pass; wherein the first set of locations is less than a total number of locations in the column; and depositing an ink into a second set of locations in the column in a subsequent print pass; wherein the second set of locations is less than a total number of locations in the column. Preferably the number of nozzles used to fill all locations in a column is equal to the number of print passes needed to print the column. All locations in the swathe are printed after all print passes using a regular repeating randomized pattern, such that be ensured that print locations are not under filled, or over filled.

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: A light-emissive polymer comprising the following unit: where X is one of S, O, P and N; Z is N or P; and R is an alkyl wherein one or more non-adjacent C atoms other that the C atom adjacent to Z may be replaced with O, S, N, C?O and —COO— or an optionally substituted aryl or heteroaryl group.

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: The present invention provides a method of manufacturing an organic thin film transistor (TFT), comprising: providing a substrate layer; providing a gate electrode layer; providing a dielectric material layer; providing an organic semiconductor (OSC) material layer; providing a source and drain electrode layer; and wherein one or more of the layers is deposited using a laser induced thermal imaging (LITI) process. Preferably the organic TFT is a bottom gate device and the source and drain electrodes are deposited on an organic semiconductor layer, or over a dielectric material layer using LITI. Further preferably a dopant material may be provided between the OSC material and the source and drain electrode layer, wherein the dopant material may also be deposited using LITI. Also preferably, wherein the dopant may be a charge neutral dopant such as substituted TCNQ or F4TCNQ.

Abstract: A polymer compound that, when used for fabrication of a light emitting device, results in an excellent luminance lifetime for the obtained light emitting device. A polymer compound comprising a constitutional unit represented by formula (1). (In the formula, R1 and R2 each independently represent an unsubstituted alkyl group. R3 and R4 each independently represent a group other than an unsubstituted alkyl group. R5 and R6 each independently represent an unsubstituted or substituted alkyl, unsubstituted or substituted alkoxy or unsubstituted or substituted aryl group. The letters a and b each independently represent an integer of 0-4. The letters c and d each independently represent an integer of 0-3. When multiple R3, R4, R5 and R6 groups are present, they may be the same or different.

Abstract: A method of forming a top gate transistor comprising the steps of providing a substrate carrying source and drain electrodes defining a channel region therebetween; treating at least part of the surface of the channel region to reduce its polarity; and depositing a semiconductor layer in the channel.

Abstract: An electroluminescent material comprises the following structural unit: where X is selected from a group consisting of NR, O, S, SO, SO2, CR2, PR, POR, BR, SiR2; where R is a substituent group and Ar1 and Ar2 comprise aromatic rings; and, wherein Ar1 or Ar2 is fused to a further aryl system Ar3. An optical device comprises a first electrode for injection of positive charge carriers, a second electrode for injection of negative charge carriers and a layer located between the first and second electrode comprising the electroluminescent material.