Abstract: A display device comprising at least one substrate(1, 2), a first and a second electrode(7, 8), a display medium (12) and an optically active layer(3, 5), wherein said optically active layer comprises a polarizer (3) and is arranged between said substrate and said display medium, and wherein said substrate is made of a birefringent material.

Abstract: The present invention relates to carbazole compounds of formula (I) and a semiconducting material comprising such carbazole compounds. It also relates to a process for the preparation of such carbazole compounds, as well as to the use thereof as a semiconducting material, in particular as a host matrix for phosphorescent emitters.

Abstract: The invention relates to a method for detection of an analyte in a test sample by a specific binding reaction among the analyte, a specific binding partner for the analyte, and an (immuno)reactant provided with a label, characterized in that the label is a lanthanide ion-ligand complex wherein the lanthanide ion is neodymium(III) ion (Nd3+), ytterbium(III) ion (Yb3+), or erbium(III) ion (Er3+) and the ligand comprises or is in contact with a sensitizing moiety which absorbs in the 400-1000 nm region, and preferably in the 400-800 nm region.

Abstract: A description is given of an electroluminescent device (1) comprising an active layer (7) of an organic charge-transfer compound having a donor-bridge-acceptor structure in a polymer matrix. A blue emitting EL device may be formed having a high electroluminescent intensity and increased stability.

Abstract: Luminescent device containing a luminescent material comprising organic lanthanide complexes comprising organic ligands of which at least one organic ligand is an aromatic ketone comprising a substituted electron donor group. This material has improved luminescence properties, and may be used in electroluminescent devices.

Abstract: The invention describes an electroluminescent device wherein the device is characterized by a light emitting layer (3) comprising quantum dots. The quantum dots are provided with capping molecules with functional units on the quantum dot surfaces which cause excited state injection into the quantum dots. The capping molecules with functional units comprise electron transport moieties and/or hole transport moieties and/or exciton transport moieties, which cause the injection of electrons, holes, and excitons, respectively, to the core of the quantum dots.

Abstract: Luminescent device containing a luminescent material comprising organic lanthanide complexes comprising organic ligands of which at least one organic ligand is an aromatic ketone comprising a substituted electron donor group. This material has improved luminescence properties, and may be used in electroluminescent devices.

Abstract: The invention relates to a method for detection of an analyte in a test sample by a specific binding reaction among the analyte, a specific binding partner for the analyte, and an (immuno)reactant provided with a label, characterized in that the label is a lanthanide ion-ligand complex wherein the lanthanide ion is neodymium (III) ion (Nd 3+), ytterbium(III) ion (Yb 3+), or erbium(III) ion (Er 3+) and the ligand comprises or is in contact with a sensitizing moiety which absorbs in the 400-1000 nm region, and preferably in the 400-800 nm region.

Abstract: A description is given of an electroluminescent device (1) comprising an active layer (7) of an organic charge-transfer compound having a donor-bridge-acceptor structure in a polymer matrix. A blue emitting EL device may be formed having a high electroluminescent intensity and increased stability.

Abstract: An electroluminescent device (1) comprising an active layer (7) of an organic charge-transfer compound having a donor-bridge-acceptor structure in a polymer matrix. A blue emitting EL device may be formed having a high electroluminescent intensity and increased stability.

Abstract: The invention pertains to an electroluminescent device comprising an electroluminescent material of at least two metal chelates, each metal chelate comprising a metal and chelating moieties, which metal chelates are connected to each other through a &pgr;-conjugated spacer or through a &sgr;-conjugated spacer with enhanced through bond interaction. The electroluminescent material is used in LEDs and LECs.

Abstract: The invention relates to a polymeric waveguide comprising a lanthanide ion-sensitizer complex, characterized in that the lanthanide ion is preferably neodymium(III) ion (Nd3+), ytterbium(III) ion (Yb3+), or erbium(III) ion (Er3+), and the sensitizer absorbs in the 400-1200 nm region, and preferably in the 600-1000 nm region. The invention also relates to an optical device comprising the same.

Abstract: The invention pertains to a calibration layer comprising an optically transparent polymer containing an amount of photobleachable luminscent material present in such a way that the final polymer film contains less than 10 wt. % of luminophore and has an optical attenuation of less than 0.3 absorption units in the wavelength region of interest. The invention further is concerned with a method of calibration of an optical image device, preferably an optical or Raman microscope, by using the decrease in luminescence as the result of photobleaching between two consecutive images for calibration.

Abstract: The present invention provides an electro-optical device comprising NLO polymer in the active layer with improved stability for light in the wavelength range of 600-1600 nm is guided through the device. The present invention is directed to an electro-optical device comprising two cladding layers and an active layer sandwiched between these cladding layers, with the active layer comprising a non-linear optically active side chain polymer with NLO-chromophores having an N-donor-delocated .pi. system-acceptor structure, the N-donor not being bonded directly to alkyl groups. There are two ways to create NLO-chromophores with N-donors which do not have adjacent linear alkyl groups: The first way is to bond one or two aromatic groups. The N-atom is further bonded to the delocated .pi. system. If only one aromatic group is present, the N-atom is, besides the delocated system, further bonded to a hydrogen or deuterium atom.