Abstract: A phosphorescent compound of formula (I): (Formula (I)) wherein: M is a transition metal; L in each occurrence is ON independently a mono- or poly-dentate ligand; R1 is a C4-20 alkyl comprising at least one tertiary carbon atom; R2 is a linear, branched or cyclic C1-20 alkyl group; R3 is a linear, branched or cyclic C1-20 alkyl group or a group of formula —(Ar1)p wherein Ar1 in each occurrence is an unsubstituted or substituted aryl or heteroaryl group and p is at least 1; R4 is a group of formula —(Ar2)q wherein Ar2 in is an unsubstituted or substituted aryl or heteroaryl group and q is at least 1; R5 is a substituent; w is 0 or a positive integer; x is at least 1; and y is 0 or a positive integer. The compound may be used as a blue light-emitting material in an organic light-emitting device.

Abstract: Methods of metal-catalysed polymerisation are described using a metal catalyst of formula (III): wherein R3 in each occurrence is independently selected from C1-10 alkyl and aryl that may be unsubstituted or substituted with one or more substituents; y is 0 or 2; and Z?is an anion. Methods described include Buchwald-type and Suzuki-type polymerisation.

Abstract: A device for optically exciting fluorescence is disclosed. The device comprises transparent substrate having first and second opposite faces and a multilayer stack disposed on the second face of the substrate. The multilayer stack comprises a first layer having first and second opposite faces and a first refractive index and a second layer having first and second opposite faces and a second refractive index. The first face of the first layer is disposed on the second face of the substrate. The first face of the second layer is disposed on the second face of the first layer such that the first layer is interposed between the second layer and the substrate. The substrate has a third refractive index. The first refractive index is less than the second refractive index and the third refractive index. The device comprises a light source carried by the first face of the substrate and arranged to emit light towards the first face of the first layer.

Abstract: This invention relates to polymer-based electrodes comprising at least one layer containing: a continuous, solid and porous electroactive polymer material, and liquid electrolyte present in the pores of the electroactive polymer material. As a result of the modified morphology of the polymer layer thin-film charge-storage devices using these polymer-based electrodes exhibit improved charge-storage and current output and enable manufacturing of a gradual continuum between batteries and supercapacitors. In addition, the invention relates to methods of producing the above polymer-based electrodes and thin-film charge-storage devices.

Abstract: A polymer comprising a repeat unit of formula (I): wherein R1 in each occurrence is independently H or a substituent, and the two groups R1 may be linked to form a ring; R2 in each occurrence is independently a substituent; Ar1 in each occurrence is independently an aryl or heteroaryl group that may be unsubstituted or substituted with one or more substituents; R3 in each occurrence is independently a substituent; each n independently is 0, 1, 2 or 3 with the proviso that at least one n=1; and each m is independently 0 or 1. The polymer may be a light-emitting 103 of an organic light-emitting device.

Abstract: Methods of metal-catalysed polymerisation are described using a metal catalyst of formula (III): wherein R3 in each occurrence is independently selected from C1-10 alkyl and aryl that may be unsubstituted or substituted with one or more substituents; y is 0 or 2; and Z?is an anion. Methods described include Buchwald-type and Suzuki-type polymerisation.

Abstract: A compound of formula (I) wherein: Ar1 represents an aryl or heteroaryl group that may be unsubstituted or substituted with one or more substituents; n is 0 or 1; and Xan independently in each occurrence represents a group selected from formula (IIa) or (IIb): wherein X is O or S; R1 independently in each occurrence is H or a substituent; R2 independently in each occurrence is H or a substituent; p independently in each occurrence is 0, 1, 2, 3 or 4; q is 0, 1, 2 or 3; and * represents a bond to Ar1. Use of compounds of formula (I) as a host for phosphorescent emitters is disclosed.

Abstract: A method of forming a crosslinked polymer comprising the step of reacting a crosslinkable group in the presence of a polymer, wherein: the crosslinkable group comprises a core unit substituted with at least one crosslinkable unit of formula (I): the crosslinkable group is bound to the polymer or is a crosslinkable compound mixed with the polymer; Ar is aryl or heteroaryl which may be unsubstituted or substituted with one or more substituents independently selected from monovalent substituents and a divalent linking group linking the unit of formula (I) to the core unit; and R is independently in each occurrence H, a monovalent substituent or a divalent linking group linking the unit of formula (I) to the core unit, with the proviso that at least one R is not H.

Abstract: Provided is a polymer blend for a semiconducting layer of an organic electronic device, comprising: a first polymer; a second polymer which is different from the first polymer; and a semiconductor compound selected from the group of pentacene derivatives and thiophene derivatives. The semiconductor compound is distributed homogeneously in the semiconducting layer in the direction parallel to the surface of the electrodes. This improved lateral distribution of the semiconductor compound in the semiconducting layer provides a reduced contact resistance, particularly for short channel length devices.

Abstract: A compound of formula (I) wherein Z is a group of formula (II) and Core is selected from groups of formula (IIIa) or (IIIb) wherein X is S or O; R1 is a substituent; n is 0 or a positive integer; Ar1 independently in each occurrence is an arylene group; R2 is a substituent; R3 is a substituent; R4 is an arylene or heteroarylene group; Y is C or Si; a is 1, 2 or 3; b is 0 or a positive integer; and c is 0 or a positive integer. The compound of formula (I) may be used as a host for a light-emitting dopant in an organic light-emitting device.

Abstract: A compound of formula (I) or (III) (Formulae (I), (III)) wherein: one Y is a substituent R1 bound directly to the fluorene unit of formula (I) by an sp3-hybridised carbon atom; the other Y is an aryl or heteroaryl group Ar1 that may be unsubstituted or substituted with one or more substituents; Ar2 is an arylene or heteroarylene group; R2 is a substituent; b is 0, 1, 2, 3 or 4; c is 0, 1, 2 or 3; and X is a group of formula (II): (Formula (II)) wherein Z is O or S; R3 independently in each occurrence is a substituent; each x is independently 0, 1, 2 or 3; and * is a bond to the fluorene unit of formula (I). The compounds may be used as host materials for phosphorescent dopants in organic light-emitting devices.

Abstract: An organic white light-emitting device comprising an anode, a cathode and at least one light-emitting layer between the anode and the cathode, wherein a first light-emitting layer comprises a first light-emitting compound of formula (I): wherein R1, R2 and R3 independently in each occurrence is a substituent; M1 is a transition metal; L1 is a ligand other than a ligand of formula: (II) a and b are each 0 or a positive integer; x is at least 1; and y is 0 or a positive integer, a light-emitting layer of the device comprising at least one further light-emitting material.

Abstract: A composition suitable for use in an organic light-emitting layer (103) of an organic light-emitting device having an anode (101) and a cathode (105), the composition comprising a fluorescent light-emitting material, a first triplet-accepting material and a second triplet-accepting material that is different from the first triplet-accepting material. The fluorescent light-emitting material may be a repeat unit of a light-emitting polymer, and the first and second triplet-accepting materials may independently be repeat units of the light-emitting polymer or may be mixed with the fluorescent light-emitting material.

Abstract: The present invention relates to a compound of general formula (I) which can transport holes in an organic optoelectronic device, and to blends and solutions comprising the compound of general formula (I): wherein X is C, Si or Ge; A is a group of formula (II) wherein Z is N, P, NH, O or S; E is C1-10 alkyl or H; W is substituted or unsubstituted C5-14 aryl or substituted or unsubstituted C6-16 alkyl; e is an integer from 1 to 4; and z is 1 or 2; B, C and D are each independently A, H, C1-C12 alkyl, C5-14 aryl or OH; and a, b, c and d are each independently an integer from 1 to 5.

Abstract: A method of forming a polymer comprising repeat units of formula (II) or a salt thereof by forming a precursor polymer of formula (I) and converting the precursor polymer to the polymer comprising repeat units of formula (II): (Formulae (II), (III)) wherein BG is a backbone group; Sp1 and Sp2 are each a spacer group; x is 0 or 1; y is at least 1; X is O or NR2 wherein R2 is H or a substituent; P is selected from the group consisting of unsubstituted or substituted benzyl, CR13, COR1, COOR1 or, if X?O, SiR13; wherein R1 in each occurrence is a C1-20 hydrocarbyl group; R3 in each occurrence is a substituent; and z is 0 or a positive integer. The polymer of formula (II) may form a layer of an organic electronic device and the layer may be formed by deposition of the polymer dissolved in a polar solvent.

Abstract: A sensor for detection of a target species is provided. The sensor includes a capture layer on an organic semi-conductor to which biomolecules may be bound. The capture layer polymer is deposited from a non-aqueous solution and the polymer is insoluble in water and has reactive groups for interaction with the analyte directly or via a conjugated species. Organic electronic devices, for example organic thin-film transistors having the capture layer are also provided. Use of a capture layer provides a low cost high quality biosensor which may be reliably produced in large quantities.

Abstract: An assay device for the quantitative determination of the concentration of at least one analyte in a liquid sample. The device comprises a lateral flow membrane (46) comprising a plurality of test regions (41A, 41B) and formed from a light transmissive material, a plurality (44A, 44B) of planar organic light emitting diode (OLED) emitters comprising an emission layer of an organic electroluminescent material, and a plurality (49A, 49B) of planar organic photodetectors (OPDs) comprising an absorption layer of an organic photovoltaic material. Each test region comprises an immobilised component for retaining analyte tagging particles. Each test region is aligned with the emission layer of one emitter and the absorption layer of one photodetector. The aligned emitter, photodetector, and test region form a group such that the emitter is capable of illuminating the test region and the photodetector is capable of detecting light from the test region.

Abstract: The invention relates to a cathode layer stack used for semi-transparent organic photovoltaic devices with improved transmission of light in the visible wavelength range and excellent photovoltaic response. The cathode layer stack comprises an organic buffer layer (14b) deposited over a semi-transparent metal cathode (14c) and a silicon dioxide (SiO2) layer (14a) provided over the organic buffer layer (14b), wherein the refractive index of the silicon dioxide layer is lower than the refractive index of the buffer layer, and wherein the thickness of the silicon dioxide layer is less than 100 nm. In further embodiments, methods of manufacturing the cathode layer stack, organic photovoltaic devices comprising said cathode layer stack and uses thereof are described.

Abstract: Light-Emitting Compound A composition comprising a light-emitting compound having a peak wavelength of at least 650 nm and a material comprising a group of formula (I): wherein Ar1, Ar2 and Ar3 in each occurrence are independently selected from a C6-20 aromatic group and a 6-20 membered heteroaromatic group of C and N ring atoms and at least one of Ar1, Ar2 and Ar3 is a 6-20 membered heteroaromatic group of C and N ring atoms; x, y and z are each independently at least 1; n, m and p are each independently 0 or a positive integer; and R1, R2 and R3 in each occurrence is independently a substituent or a single bond to a polymer chain, wherein the group of formula (I) has no more than 3 single bonds to a polymer chain. The composition may be used in the light-emitting layer of an infrared organic light-emitting device.

Abstract: A compound of formula (I): wherein M is a transition metal; Ar1 is a 5 or 6 membered heteroaryl ring or a polycyclic heteroaromatic group; Ar2 is a polycyclic group comprising two or more rings selected from aromatic and heteroaromatic rings; Ar1 and Ar2 may be linked by a direct bond or divalent linking group; L is a ligand; x is at least 1; a, b and y are each 0 or a positive integer; R1, R2 and R3 are each independently a substituent; and (i) Ar1 is a polycyclic heteroaromatic group; or (ii) Ar1 is a 5 or 6 membered heteroaryl ring and Ar2 is a polycyclic group comprising at least 3 rings selected from aromatic and heteroaromatic rings. The compound may be used as an infra-red emitting material of an organic light-emitting device.