Abstract: An organic photodetector (OPD) comprises a microcavity defined by a reflective electrode and a semi-transparent electrode, wherein the microcavity comprises a transparent conductive oxide layer and an active layer comprising an n-type organic semiconductor and a p-type organic semiconductor, and wherein the blend of the n-type organic semiconductor and the p-type organic semiconductor exhibits low absorption at the resonance wavelength, which results in an excellent optical sensitivity in a favorably narrow wavelength region and allows to tune the response to different wavelengths depending on the desired application. In addition, methods of producing such organic photodetectors and methods of tuning the resonance of a microcavity formed in an organic photodetector (OPD) to a predetermined wavelength are provided.

Abstract: Provided is a light-emitting device including an anode, a light-emitting layer, an electron-transporting layer and a cathode. The electron-transporting layer contains at least one electron-transporting material whose LUMO level is ?3.0 eV or more and at least one dopant material selected from the group consisting of a heterocyclic compound whose SOMO level is ?2.2 to ?1.5 eV and a derivative thereof. The LUMO level of the electron-transporting material is smaller than the SOMO level of the heterocyclic compound.

Abstract: A compound represented by the formula (1) is provided: wherein A1 represents an oxygen atom, a sulfur atom, —NR5— or —PR5—; at least one A1 is —NR5— or —PR5—; R1 represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryloxy group, an alkylsulfenyl group, a cycloalkylsulfenyl group, an arylsulfenyl group or a disubstituted amino group; R2 and R3 represent an alkyl group, a cycloalkyl group, an aryl group, an alkoxy group, a cycloalkoxy group, an aryloxy group, an alkylsulfenyl group, a cycloalkylsulfenyl group, an arylsulfenyl group, a monovalent heterocyclic group, a halogen atom or a disubstituted amino group; R4 represents a hydrogen atom, —C(R6)3, —OR7, —N(R7)2 or —Si(R7)3; m represents an integer of 0 to 3; and n represents an integer of 0 to 4.

Abstract: A polymer comprising one or more optionally substituted repeat units of formula (I): wherein each Ar1 independently represents a substituted or unsubstituted aromatic or heteroaromatic group; each Ar2 independently represents a substituted or unsubstituted aromatic or heteroaromatic group; n and m in each occurrence is at least 1; and R1 and R2 are substituents wherein R1 and R2 are different.

Abstract: A composition comprising a first material substituted with at least one group of formula (I) and a second material substituted with at least one group selected from groups of formulae (IIa) and (IIb): wherein: Sp1 and Sp2 are spacer groups; NB independently in each occurrence is a norbornene group that may be unsubstituted or substituted with one or more substituents; n1 and n2 are 0 or 1; m1 is 1 if n1 is 0 and m1 is at least 1 if n1 is 1; m2 is 1 if n2 is 0 and m2 is at least 1 if n2 is 1; Ar1 represents an aryl or heteroaryl group; R1 independently in each occurrence is H or a substituent; and * represents a point of attachment to the first or second material. The composition may be used to form a layer of an organic electronic device, for example the hole-transporting layer of an organic light-emitting device.

Abstract: We describe a method for reducing a parasitic resistance at an interface between a conducting electrode region and an organic semiconductor in a thin film transistor, the method comprising: providing a solution comprising a dopant for doping said semiconductor, and depositing said solution onto said semiconductor and/or said conducting electrode region to selectively dope said semiconductor adjacent said interface between said conducting electrode region and said semiconductor, wherein depositing said solution comprises inkjet-printing said solution.

Abstract: An organic light-emitting device (100) comprising an anode (103); a cathode (109); a light-emitting layer (107) between the anode and the cathode; a first hole-transporting layer (105A) comprising a first conjugated hole-transporting polymer between the anode and the light-emitting layer; and a second hole-transporting layer (105B) comprising a second conjugated hole-transporting polymer between the first hole-transporting layer and the light-emitting layer, wherein a lowest excited state energy level of the first hole-transporting polymer is lower than the lowest excited state energy of the second hole-transporting polymer.

Abstract: A material substituted with a group of formula (I): wherein: Ar1 is an aryl or heteroaryl group; Sp1 represents a first spacer group; n1 is 0 or 1; m1 is 1 if n1 is 0 and m1 is at least 1 if n1 is 1; R1 independently in each occurrence is H or a substituent, with the proviso that at least one R1 is a group R11 selected from: alkyl comprising a tertiary carbon atom directly bound to a carbon atom of the cyclobutene ring of formula (I); branched alkyl wherein a secondary or tertiary carbon atom of the branched alkyl is spaced from a carbon atom of the cyclobutene ring of formula (I) by at least one —CH2— group; and alkyl comprising a cyclic alkyl group; or with the proviso that at least two R1 groups are linked to form a ring.

Abstract: A cationic nanoparticulate material comprises polymer and a BF4?, PF6? or SbF5? counterion. A layer of an organic electronic device, such as an organic light-emitting device, comprises the nanoparticulate material dispersed in an organic semiconducting layer.

Abstract: An OLED comprising a hole-transporting layer and light-emitting layer wherein the hole-transporting layer comprises a hole-transporting polymer wherein no more than 5% of the polystyrene equivalent polymer weight measured by gel permeation chromatography consists of chains with weight of less than 50,000.

Abstract: Apparatus for optically exciting fluorescence and detecting light is disclosed. The apparatus comprises a device for optically exciting fluorescence. The device comprises a 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.

Abstract: The present invention relates to an organic flow cell battery having a material comprising an organic molecule that can be used as the electroactive redox material for both electrodes of the battery. By enabling two-electron processes both of the oxidation and reduction to occur in a single molecule, a total of 4-electron transitions is achieved, which allows the organic molecule to be used on both sides of the separator, reducing material costs and allowing the battery to be charge in either direction with equal ease.

Abstract: A method of making an electrode for an organic electronic device comprises the steps of depositing an ink on a light emitting layer, and drying said ink to form said electrode. The ink comprises conductive metal or carbon particles, a binder and a hydrocarbon solvent selected from 1,1?-bicyclohexyl, cis-decalin trans-decaiin or n-undecane.

Abstract: Polymer and Organic Light Emitting Device A polymer comprising a repeat unit of formula (I a), (I b) or (Ic): (Formulae (Ia), (Ib), (Ic)) wherein M is a metal; R is a backbone repeat group; n is 1 or 2; Sp is a spacer group; w is 0 or 1; L1 and L2 are mono- or bidentate co-coordinating groups; ---- represents a second metal to ligand bond in the case where L1 or L2 is a bidentate ligand and at least one of L1 and L2 is substituted with group of formula (II) (Formula (II)) wherein m is 0 or 1; each Ar1, Ar2 and Ar3 is aryl or heteroaryl. The polymer may be used as an emissive material in an organic light-emitting device.

Abstract: A polymer having a backbone of alternating N atoms and aromatic or heteroaromatic groups including a repeating structure of formula (I) wherein: R3 independently in each occurrence is a substituent; m is 0 or a positive integer; Ar1 and Ar2 are an aryl or heteroaryl group and at least one group selected from Ar1 and Ar2 has formula (II) wherein: each x is independently 0 or a positive integer; each y is independently 0 or a positive integer, and R1 and R2 independently in each occurrence is a substituent.

Abstract: An organic electronic device comprising an anode, a cathode, a semiconducting layer between the anode and the cathode and a hole transporting layer between the anode and the semiconducting layer, the hole-transporting layer comprising a co-polymer comprising repeat units of formula (I) and one or more co-repeat units: (I) wherein: Ar1 independently in each occurrence represents a fused aryl or fused heteroaryl group that may be unsubstituted or substituted with one or more substituents; Ar2 represents an aryl or heteroaryl group that may be unsubstituted or substituted with one or more substituents; R independently in each occurrence represents a substituent; and m is 1 or 2, preferably 1; and each Ar1 is directly bound to an aromatic or heteroaromatic group of a co-repeat unit.

Abstract: A method of manufacturing a conductive layer includes the step of dissolving an organic semiconductor polymer in a first solvent, the first solvent being an aromatic or heterocyclic compound comprising one or more electron-rich carbon atom(s) and/or heteroatom(s). The method also includes dissolving a dopant in a second solvent, the second solvent being a polar solvent. The method also includes mixing the solutions of the organic semiconductor polymer and the dopant to form a dispersion comprising doped conductive polymer particles suspended in the solvent blend. The method also includes depositing the dispersion by a solution deposition technique to form a conductive layer. The solution deposition technique is preferably an inkjet printing, dispense printing or drop casting method. The dispersion provides a stable ink composition for the manufacturing of thick and uniform layers with excellent conductivity and thermopower, and allows simple fabrication of thermoelectric legs with enhanced performance.

Abstract: A metal complex of formula (I): M(L1)x(L2)y??(I) wherein: M is a second or third row transition metal; L1 in each occurrence is independently a light-emitting ligand; L2 is an auxiliary ligand; x is at least 1; y is at least 1; each L1 is a group of formula (IIa) or (IIb): wherein R1-R10 are each independently H or a substituent with the proviso at least one of R3, R5 and R9 of at least one L1 is a group of formula —(Ar)p wherein Ar in each occurrence is independently an aryl or heteroaryl group that may be unsubstituted or substituted with one or more substituents, and p is at least 2.

Abstract: A sensor comprising a light source (103); a photodetector (105); a sample receptacle such as a microfluidic device (101) between the light source and the photodetector; and one or both of a first light filter (107) and a second light filter (109) wherein the first light filter is provided between the sample receptacle and the photodetector and the second light filter is provided between the sample receptacle and the light source. The first light filter may comprise tartrazine. The second light filter may comprise Coomassie violet R200, Victoria Blue B or acid fuchsin. In use, light h?1 emitted from the light source is absorbed by a luminescent indicator in the sample receptacle which then emits light h?2 detected by the photodetector.

Abstract: A polymer comprising a fluorescent light-emitting repeating unit comprising a group of formula ED-EA wherein ED is an electron-donating unit; EA is an electron-accepting unit; and a band gap EgCT of a charge-transfer state formed from the electron-donating unit and the electron-accepting unit is smaller than the bandgap of either the electron-accepting unit EgEA or that of the electron-donating unit EgED.