Abstract: An edge lit illumination system is directed to providing backlighting utilizing a luminescent impregnated lightguide. The apparatus includes an LED radiation source providing a first radiation and a lightguide optically coupled to the LED radiation source including a luminescent material embedded or coated on an output surface of the lightguide designed to absorb the first radiation, and emit one or more radiations. The illumination system may further include additional optical components such as reflective layers, for directing radiation striking the back surfaces of the light guide back into the lightguide, as well as diffusion layers, UV reflectors, and polarizers.

Abstract: A hybrid electroluminescent (EL) device comprises at least one inorganic diode element and at least one organic EL element that are electrically connected in series. The absolute value of the breakdown voltage of the inorganic diode element is greater than the absolute value of the maximum reverse bias voltage across the series. The inorganic diode element can be a power diode, a Schottky barrier diode, or a light-emitting diode.

Abstract: Optoelectronic devices include polysiloxanes derived from hydrosilation of an organometallic compound of formula L2MZ, wherein L and Z are independently bidentate ligands; at least one of L and Z comprises alkenyl, alkenylaryl, alkenyloxy, alkenyloxyaryl, alkynyl, alkynylaryl, alkynyloxy, alkynyloxyaryl, substituted alkenyl, substituted alkenylaryl, substituted alkenyloxy, substituted alkenyloxyaryl, substituted alkynyl, substituted alkynylaryl, substituted alkynyloxy, substituted alkynyloxyaryl, acrylate, methacrylate, or a combination thereof; and M is Zr, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, Hf, Ta, W, Re, Os, Ir, Pt, Au, Hg, Ga, Ge, In, Sn, Sb, Tl, Pd, Bi, Po, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, or Lu.

Abstract: The invention includes embodiments that relate to a method of making an organic light-emitting device comprising at least one bilayer structure. The method comprises providing at least one first layer comprising at least one cross-linkable organic material and at least one photo acid generator; exposing the first layer to a radiation source to afford a cross-linked first layer; and disposing at least one second layer on the cross-linked first layer. The method affords a bilayer structure having an enhanced structural integrity relative to the corresponding bilayer structure in which the first layer is not cross-linked. The invention also includes embodiments that relate to an organic light emitting device.

Abstract: An electrooptic device and a surface modified electrode comprising a reduced organic material are provided. The reduced organic materials lower the work function of an electrode surface; they are also electro-active. These capabilities facilitate their use in production of more efficient electrooptic devices. The electrooptic device has at least a first conductive layer, a second conductive layer, and an electro-active layer comprising the reduced organic material disposed between the first and second conductive layers. The surface modified electrode comprises at least one conductive layer and at least one reduced organic material disposed upon a surface of said conductive layer. Methods for using the organic electro-active material for producing electrooptic devices, and operating the electrooptic devices are also disclosed. Coating compositions and coated articles comprising the reduced organic materials are also provided.

Abstract: A surface modified electrode comprising at least one conductive layer, and at least one reduced polymeric material, wherein the reduced polymeric material comprises at least one additional electron relative to a corresponding neutral polymeric precursor; and at least one cationic species is provided. Coating compositions and coated articles comprising the reduced polymeric materials are also provided. The coating compositions lower the work function of the electrode surface, thereby facilitating the production of more efficient electrooptic devices.

Abstract: The present invention relates to an area illumination light source comprising a plurality of individual OLED panels. The individual OLED panels are configured in a physically modular fashion. Each OLED panel comprising a plurality of OLED devices. Each OLED panel comprises a first electrode and a second electrode such that the power being supplied to each individual OLED panel may be varied independently. A power supply unit capable of delivering varying levels of voltage simultaneously to the first and second electrodes of each of the individual OLED panels is also provided. The area illumination light source also comprises a mount within which the OLED panels are arrayed.

Abstract: A hybrid electroluminescent (EL) device comprises at least one inorganic diode element and at least one organic EL element that are electrically connected in series. The absolute value of the breakdown voltage of the inorganic diode element is greater than the absolute value of the maximum reverse bias voltage across the series. The inorganic diode element can be a power diode, a Schottky barrier diode, or a light-emitting diode.

Abstract: An edge lit illumination system is directed to providing backlighting utilizing a luminescent impregnated lightguide. The apparatus includes an LED radiation source providing a first radiation and a lightguide optically coupled to the LED radiation source including a luminescent material embedded or coated on an output surface of the lightguide designed to absorb the first radiation, and emit one or more radiations. The illumination system may further include additional optical components such as reflective layers, for directing radiation striking the back surfaces of the light guide back into the lightguide, as well as diffusion layers, UV reflectors, and polarizers.

Abstract: A light-emitting device comprises a stack of organic electroluminescent (EL) elements, wherein an organic EL element in the stack overlaps at least a portion of another organic EL element, and the organic EL elements are electrically separate. Each of the organic EL elements of the stack is activated with a different level of voltage.

Abstract: A light-emitting device comprises a light-emitting member, which comprises two electrodes, at least two organic electroluminescent (“EL”) materials disposed between the electrodes, a charge blocking material disposed between the electrodes, and at least one photoluminescent (“PL”) material. The light-emitting member emits electromagnetic (“EM”) radiation having a first spectrum in response to a voltage applied across the two electrodes. The PL material absorbs a portion of the EM radiation emitted by the light-emitting member and emits EM radiation having second spectrum different than the first spectrum. Each of the organic EL materials emits EM radiation having a wavelength range selected from the group consisting of blue and red wavelength ranges.

Abstract: Disclosed is a polymer composition derived from a bis-phenol comprising a conjugated aromatic radical, optionally comprising nitrogen. Suitable bis-phenols as well as methods for making said polymer are also disclosed. Also disclosed are electroactive layers comprising said polymer and electroactive devices comprising said layer.

Abstract: A method of applying at least two phosphors to an LED, wherein a first phosphor material having a lower absorption, shorter luminescence decay time, and/or lower thermal quenching than a second phosphor material is positioned closer to the LED than the second phosphor. Such an arrangement provides a light emitting device with improved lumen output and color stability over a range of drive currents.

Abstract: Disclosed is an opto-electroactive device comprising a metallocene of the formula wherein M is zirconium or hafnium; X is halogen and R1-R5 are each independently hydrogen, aryl, alkyl, halogen or —Si(R6)3; or wherein at least two adjacent R substituents on at least one ring are joined to form a fused ring, which may be unsubstituted or substituted with aryl, alkyl, halogen or —Si(R6)3; or wherein the R1 substituents on each ring are joined to link the rings in an ansa bridge, and wherein R6 is an alkyl group, a substituted alkyl group, an aryl group or a substituted aryl group. Also disclosed is a method for making an opto-electroactive device comprising a metallocene.

Abstract: Disclosed are polymers comprising 2-(7-benzothiazolyl-9,9-disubstituted fluorene) structural units of the formula wherein R1 and R2 are each independently an alkyl group, an aralkyl group, an aryl group, or an —Si(R)3 group wherein R is an alkyl group; R3 is selected from the group consisting of an electron-donating substituent and an electron-withdrawing substituent; x has the value of from zero up to the number of hydrogens available for substitution on the aromatic ring; Z and Q are each independently a group which is in conjugation with both the fluorene group and the benzothiazole group; and the parameters j and k each independently have the value of 0-2. Electroactive devices comprising said polymers, methods for preparing said polymers, and monomers for preparing said polymers are also disclosed.

Abstract: A charge transfer-promoting material comprises a material having a formula selected from the group consisting of AM, An?Mn+ and {A-R3}n?Mn+; wherein A is a fused ring radical having from 2 to 4 rings, inclusive; crown ethers; cryptands; or macrocyclic polyamines; M is a metal; R3 is selected from the group consisting of alkoxy silane, carboxylic acid, thiol, amine, phosphine, amide, imine, ester, anhydride, and epoxy, and is covalently attached to A; and n is an integer number selected from the group consisting of 1, 2, and 3. Electronic devices comprise such a charge transfer-promoting material for enhancing the charge injection or transport between an electrode and an electronically active material.

Abstract: A solid-state imager with back-side irradiation. The present invention provides a solid-state imager that includes a substantially radiation transparent substrate adapted to receive incident radiation. The radiation travels through the substrate and a pixelated array of photosensitive elements to a scintillator material, which absorbs the radiation. The pixelated array of photosensitive elements receives light photons and measures the amount of light generated by radiation interactions with the scintillator material. With this imager, there is less spreading and blurring and thus a better quality image. In another embodiment, there is a substantially transparent material disposed between the pixelated array of photosensitive elements and the scintillator material. The substantially transparent material absorbs and substantially blocks electrons from entering the active regions of the pixelated array of photosensitive elements.

Abstract: A compound electrode comprises a first layer that comprises at least one halide compound of at least one metal selected from the group consisting of alkali metals and alkaline-earth metals; and a second layer comprising an electrically conducting material. The second layer is disposed between the first layer and an electronically active material of an electronic device. The compound electrode can serve as a cathode for an organic light-emitting device or an organic photovoltaic device. The compound electrode can be produced to be substantially transparent.

Abstract: Organic electroluminescent devices having improved light extraction include a light-scattering medium disposed adjacent thereto. The light-scattering medium has a light scattering anisotropy parameter g in the range from greater than zero to about 0.99, and a scatterance parameter S less than about 0.22 or greater than about 3.