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; and an encapsulant disposed over the second electrode, wherein the second electrode and the encapsulant are transparent to light emitted by the light emitting layer, wherein a cavity is provided between the encapsulant and the second electrode, and wherein an anti-reflective coating is provided on at least one side of the encapsulant for reducing reflection of light emitted by the light emitting layer so as to improve out-coupling of light from the device, said anti-reflective coating being transparent to light emitted by the light emitting layer.

Abstract: A semiconductive hole transport material containing polar substituent groups, the polar substituent groups substantially not affecting the electronic properties of the hole transport material and the hole transport material being soluble in a polar solvent.

Abstract: A monomer having the general formula: in which R1 is any substitution; R2 is any substitution; R1 and R2 may be linked to form a saturated or unsaturated ring; L represents a reactive leaving group; X and Y each independently represent CR2, O, BR, NR, SiR2, S, S?O, SO2, PR or P?O(R) wherein R in each occurrence is independently selected from H or a substituent; Z represents a single bond or a divalent atom or group, wherein X—Z—Y forms an unconjugated ring or chain, with the proviso that at least one of R1 and R2 is an aryl or heteroaryl group if Z is a single bond.

Abstract: An electroluminescent polymer comprising light-emissive repeat units and a non-emissive polycyclic aromatic hydrocarbon unit with greater than 12 aromatic sp2 hybridized carbon atoms, wherein the non-emissive polycyclic aromatic hydrocarbon unit comprises a structural unit having formula I:

Abstract: A switchable electronic device comprises a hole blocking layer and a layer comprising a conductive material between first and second electrodes, wherein the conductivity of the device may be irreversibly switched upon application of a current having a current density of less than or equal to 100 A cm?2 to a conductivity at least 100 times lower than the conductivity of the device before switching. The conductive material is a doped organic material such as doped optionally substituted poly(ethylene dioxythiophene).

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 monomer of formula (III): wherein X is a polymerisable group Ar, Ar1 and Ar2 each independently represent an optionally substituted aryl or heteroaryl group; R1 represents H or a substituent; and Z represents a direct bond or a divalent linking atom or group, wherein Ar1 and Ar2 are linked by a single bond or a divalent linking group selected from CR1R2, SiR1R2, PR1, NR1, O and S wherein R1 and R2 are independently selected from hydrogen; optionally substituted alkyl wherein one or more non-adjacent C atoms may be replaced with O, S, N, C?O and —COO—; alkoxy, aryl, arylalkyl, heteroaryl and heteroarylalkyl. Ar1 and Ar2 are preferably linked by an oxygen atom, and Ar1 and/or Ar2 may be fused to their respective adjacent Ar groups. Ar1 and its adjacent Ar group and/or Ar2 and its adjacent Ar group are optionally fused to form a fluorene unit.

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: A method for forming a polymer comprising the polymerization of a plurality of monomers, wherein at least one of the plurality of monomers is one or both of: a charge transporting unit and a hydrocarbon monomer in which at least one carbon atom has been substituted by an atom or group with a greater quantity of unshared valence electrons than the carbon atom it has been substituted for, and wherein at least one of the plurality of monomers comprises an end-capping compound at one end of said monomer, the end-capping compound preventing polymerization at the end, wherein the end-capping compound is not charge transporting and comprises at least two rings. The end capping compound preferably consists of or includes a structural unit having the formula: (Ar)n—X, wherein Ar in each occurrence independently represents an aryl or heteroaryl group; X represents a leaving group comprising a boron derivative group or halogen; and n is 2 or more.

Abstract: A method of forming an organic thin film transistor the method comprising: seeding a surface outside a channel region with one or more crystallization sites prior to deposition of the organic semiconductor; depositing a solution of the organic semiconductor onto the seeded surface and over the channel region whereby the organic semiconductor begins forming a crystal domain at the or each of the crystallization sites, the or each crystal domain growing from its crystallization site across the channel region in a direction determined by an advancing surface evaporation front; and applying energy to control the direction and rate of movement of the surface evaporation front thereby controlling the direction and rate of growth of the or each crystal domain across the channel region from the one or more crystallization sites outside the channel region.

Abstract: A method of manufacturing an organic thin film transistor, the method comprising: depositing a source and drain electrode over a substrate using a solution processing technique; forming a workfunction modifying layer over the source and drain electrodes using a solution processing technique; and depositing an organic semi-conductive material in a channel region between the source and drain electrode using a solution processing technique.

Abstract: An optoelectronic display comprising a plurality of pixels, each pixel comprising a plurality of sub-pixels, wherein the optoelectronic display comprises a colour-forming layer which is patterned providing a plurality of discrete colour-forming regions in a two-dimensional array, and wherein an addressing array is provided for addressing the discrete colour-forming regions, at least some of the discrete colour-forming regions having portions which are separately addressable by the addressing array, each portion defining a sub-pixel of the optoelectronic display.

Abstract: An electroluminescent device comprising: a first charge carrier injecting layer for injecting positive charge carriers; a second charge carrier injecting layer for injecting negative charge carriers; and a light-emissive layer located between the charge carrier injecting layers and comprising a mixture of: a first component for accepting positive charge carriers from the first charge carrier injecting layer; a second component for accepting negative charge carriers from the second charge carrier injecting layer; and a third, organic light-emissive component for generating light as a result of combination of charge carriers from the first and second components; at least one of the first, second and third components forming a type II semiconductor interface with another of the first, second and third components.

Abstract: A method of driving an emissive display, the display comprising a plurality of pixels each addressable by a row electrode and a column electrode, the method comprising: driving a plurality of the column electrodes with a first set of column drive signals; and driving two or more of the row electrodes with a first set of forward bias row drive signals at the same time as the column electrode driving with the column drive signals; then driving the plurality of column electrodes with a second and subsequent sets of column drive signals; and driving the two or more row electrodes with a second and subsequent sets of forward bias row drive signals at the same time as the column electrode driving with the second column drive signals.

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 forming an organic thin film transistor comprising: providing a structure comprising source and drain electrodes with a channel region therebetween, a gate electrode, and a dielectric layer disposed between the source and drain electrodes and the gate electrode; and patterning the dielectric layer using the source and drain electrodes as a mask to form a region of dielectric material in the channel region which is thinner than regions of dielectric material adjacent the channel region.

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 composition for ink jet printing an opto-electrical device, comprising a charge injecting and/or transporting organic material and a solvent mixture, wherein the solvent mixture is present in an amount of about 30% v/v based on the volume of the composition and comprises a first co-solvent and a second co-solvent miscible with the first co-solvent; wherein the first co-solvent comprises ethylene glycol; and the second co-solvent comprises glycerol, wherein the ratio by volume of the first co-solvent to second co-solvent is approximately 1:2. The composition provides slower drying PEDOT ink formulations having improved film uniformity within pixels and across swathe joins which do not compromise other aspects of the ink's performance.

Abstract: An optical sensor array comprises a photo-sensitive area formed by an array of chiplets having individual light-sensitive elements, each element configured to produce a signal or signals in response to incident light. The displacement of a chiplet from a predetermined position is derivable from the output signal or signals of the element or elements associated with the chiplet. The arrangement provides a method of measuring the displacement of at least one chiplet in an active display.

Abstract: An active matrix display comprises a display area of the matrix comprising drive circuitry including a control circuit comprising chiplets outside the display area. The output of the control circuit is distributed among the plurality of chiplets. This arrangement is advantageous in that the chiplets allow for a much smaller fan-in and fan-out structure, thus allowing a much larger percentage of the substrate to be devoted to display area.