Abstract: A method of modifying a fluorinated polymer surface comprising the steps of depositing a first layer on at least a portion of the fluorinated polymer surface, the first layer comprising a first polymer, the first polymer being a substantially perfluorinated aromatic polymer; and depositing a second layer on at least a portion of the first layer, the second layer comprising a second polymer, the second polymer being an aromatic polymer having a lower degree of fluorination than said first polymer, whereby the second layer provides a surface on to which a substance having a lower degree of fluorination than the first polymer, e.g. a non-fluorinated substance is depositable.

Abstract: A method of manufacturing an organic light emissive device comprising: depositing an organic light emissive layer over an anode and depositing a cathode over the organic light emissive layer, wherein the cathode comprises a trilayer structure formed by: depositing a first layer comprising an electron injecting material; depositing a second layer over the first layer, the second layer comprising a metallic material having a workfunction greater than 3.5 eV; and depositing a third layer over the second layer, the third layer comprising a metallic material having a workfunction greater than 3.5 eV.

Abstract: A method of manufacturing an organic thin film transistor, comprising: providing a substrate comprising source and drain electrodes defining a channel region; subjecting at least the channel region to a cleaning treatment step; and depositing organic semiconductive material from solution into the channel region by inkjet printing.

Abstract: An organic electroluminescent device having a plurality of pixels, the device comprising: an anode formed on a substrate; an organic electroluminescent layer formed on the anode in each well of a well-defining layer to form the plurality of pixels; a cathode layer on the electroluminescent layer and a layer of metal on the top surface of the well-defining layer; wherein a conductive layer is deposited over the cathode layer and the metal layer to electrically connect the cathode layer on the electroluminescent layer with the metal layer on the top surface of the well-defining layer.

Abstract: This invention generally relates to planarisation of a surface of a substrate. In an embodiment of planarising a surface region of a substrate, the substrate having a body on a portion of said surface region, the method comprises: modifying the wetability of a surface of said body with respect to a liquid planariser composition by providing a surface modifying layer such as a self-assembled monolayer thereon; and then depositing the liquid planariser composition on said substrate and said body such that the planariser composition wets said surface region, wherein said surface modifying layer determines a contact angle of said liquid planariser composition to said surface of said body such that the deposited liquid planariser composition is repelled from said surface of said body.

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: An organic electroluminescent device comprises an anode; a cathode; a first electroluminescent layer between the anode and the cathode comprising an electron transporting material; and a second electroluminescent layer between the first electroluminescent layer and the anode. The second electroluminescent layer comprises a hole transporting material and an electroluminescent electron trapping material. The first electroluminescent layer may comprises a polymer having an electron transporting material and an electroluminescent material, and may include an optionally electroluminescent hole-transporting material. The electron transporting material and one or both of the hole transporting material of the first electroluminescent layer and the electroluminescent material of the first electroluminescent layer are part of the same molecule or polymer. Preferably, the electron transporting material comprises a plurality of adjacent arylene repeat units.

Abstract: An organic light-emitting device comprises an anode; a hole injection layer in contact with the anode; a light-emitting layer over the hole injection layer; and a cathode over the light-emitting layer, wherein the hole injection layer comprises an organic semiconductor material doped with a partially fluorinated fullerene such as C60. The dopant is present in the range of about 0.1-20 wt %, optionally 0.1-5 wt %. The organic semiconductor is preferably a polymer comprising repeat units of formula (I): wherein Ar1 and Ar2 in each occurrence are independently selected from optionally substituted aryl or heteroaryl groups; n is greater than or equal to 1, preferably 1 or 2; R is H or a substituent; any of Ar1, Ar2 and R may be linked by a direct bond or linking group; and x and y are each independently 1, 2 or 3.

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 manufacturing an organic light emissive device comprising: depositing an organic light emissive layer over an anode and depositing a cathode over the organic light emissive layer, wherein the cathode comprises a trilayer structure formed by: depositing a first layer comprising an electron injecting material; depositing a second layer over the first layer, the second layer comprising a metallic material having a workfunction greater than 3.5 eV; and depositing a third layer over the second layer, the third layer comprising a metallic material having a workfunction greater than 3.5 eV.

Abstract: A polymer, for use in an organic light emitting device, comprises asymmetrically substituted repeat units of formula (I (a)): wherein R7 represents a substituent bound to the 9-carbon atom of the fluorene ring through a non-aromatic carbon atom, R8, R9 and R11 independently in each occurrence represent H or a substituent with the proviso that at least one R8 is not H; R10 independently in each occurrence is a substituent; and t in each occurrence is independently 0, 1, 2 or 3. R7 is preferably a linear alkyl substituted with one or more groups —(Ar6)w, wherein each Ar6 independently represents an optionally substituted aryl or heteroaryl group, and w is at least 1, for example 1, 2 or 3.

Abstract: A method of making a top-gate organic thin film transistor, comprising forming source and drain contacts on a substrate; oxidizing portions of the source and drain contacts; depositing an organic semiconductor layer to form a bridge between the oxidized portions of the source and drain contacts; depositing a gate insulating layer over the organic semiconductor layer; and forming a gate electrode over the gate insulating layer.

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: 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.

Abstract: A polymer containing an optionally substituted repeat unit of formula (I) wherein each R is the same or different and represents H or an electron withdrawing group, and each R1 is the same or different and represents a substituent.

Abstract: A light-emitting material comprising a conjugated polymer and a blue-light emitting perylene.

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: A semiconducting polymer and electronic devices comprising such polymer, in which the polymer has one or more repeat units, a first of the repeat units having the structure wherein R12 to R17 independently comprise H or a polyether group having at least five ethoxy repeat units, and in which at least one of R12 to R17 has a polyether 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: An organic light-emitting device comprises an anode; a cathode; a charge transporting layer comprising a charge-transporting material doped with a light-emitting dopant between the anode and the cathode; and a light-emitting layer between the anode and the cathode. The x-coordinate value and/or the y-coordinate value of CIE(x,y) coordinates of light emitted from the device is no more than 0.1, and preferably no more than 0.05, from the respective x- or y-coordinate value of a control device in which the charge transporting layer is not doped with a light-emitting dopant. The light emitting layer and charge transport material preferably comprise polymers including aryl or heteroaryl repeat units.