Abstract: A method is disclosed for fabricating organic light emitting devices (OLEDS) containing an indium tin oxide (ITO) layer that is deposited onto a fragile layer. The ITO layer is fabricated using a low, non-damaging, ITO deposition rate until a protective ITO layer is formed, at which point the ITO deposition rate is increased to a substantially higher deposition rate without causing damage to the underlying layers. OLEDs fabricated using the accelerated ITO deposition rate could be made with I-V characteristics having no practically discernible difference from the I-V characteristics of an OLED in which the ITO deposition rate was kept at a low deposition rate throughout the ITO deposition process.

Abstract: A patterning system with a photoresist overhang allows material to be deposited onto a substrate in various positions by varying the angle from which the material is deposited, and by rotating the substrate. The patterning system can be used to fabricate a stack of organic light emitting devices on a substrate using the same patterning system and without removing the substrate from vacuum.

Abstract: Optical cavities in a stacked organic light emitting device (SOLEDS) can shift or attenuate the light emitted by the individual organic light emitting devices (OLEDs) in the stack. Interference caused by reflections within the stack, absorption, positioning of the light source, and the polarization of the emitted light can all determine how the spectra of the emitted light are affected by the SOLED structure. A detailed model that provides a good fit to measured SOLED emissions can be used to predict how a SOLED will affect light emitted by OLEDs. As a result, SOLED geometries that will optimize color saturation and external quantum efficiency can be predicted.

Abstract: Arrangements for biasing the individual light emitting elements of a stacked organic light emitting device (SOLED). A circuit is provided for independently driving the individual OLEDs in a conventional SOLED having one electrode coupled to ground potential and one further electrode for each of the OLEDs in the stack. Additionally, new SOLED structures are described in which each OLED in the stack is provided with a ground reference. A SOLED combining upright and inverted OLEDs is also described.

Abstract: Monochromatic and multicolor light emitting devices which make use of phosphor layers to downconvert light emitted from organic light emitting materials into different, more desired colors. The light emitting devices of the present invention are used in a variety of applications to provide displays with high brightnesses and efficiencies.

Abstract: An organic light emitting device (OLED) is disclosed for which the hole transporting layer, the electron transporting layer and/or the emissive layer, if separately present, is comprised of a non-polymeric material. A method for preparing such OLED's using vacuum deposition techniques is further disclosed.

Abstract: An organic light emitting device (OLED) structure having reflective surfaces is fabricated in a pit formed in a substrate. The pit has slanted reflective side walls which redirect light that is waveguided in the organic layers of the OLED to a direction substantially normal to the plane of the substrate. The reflective structure can also be formed with a planar configuration over interconnects covered with a polyimide.

Abstract: Arrangements for biasing the individual light emitting elements of a stacked organic light emitting device (SOLED). A circuit is provided for independently driving the individual OLEDs in a conventional SOLED having one electrode coupled to ground potential and one further electrode for each of the OLEDs in the stack. Additionally, new SOLED structures are described in which each OLED in the stack is provided with a ground reference. A SOLED combining upright and inverted OLEDs is also described.

Abstract: A nuclear fuel element for use in a gas cooled nuclear reactor, such as a Magnox reactor, has a plurality of fuel pin supports defining an element axis passing through the supports. Suspended between the supports are a plurality of fuel pins formed by a stack of oxide fuel pellets within a metal tube. Connected between the supports are a number of elongate members, for example tubular rods, which extend parallel to the axis and are disposed around the fuel pins. One or more of the tubular rods incorporates a doping material, such as gadolinia.

Abstract: A rotary tub grinder in which a substantially cylindrical tub member is rotated relative to a stationary floor member. Material in the tub grinder is moved over the upper surface of the floor member and a portion of it is moved up a ramp into the path of a rotating hammermill. A stabilizer member is positioned on the floor member across the opening from the ramp member and serves to steady the material so that the hammers of the hammermill can uniformly feed material downwardly into the grinder. The stabilizer member extends higher above the floor member than the ramp member and the path of the rotating hammers extends higher above the floor member than the stabilizer member. A layer of material is planed off as it moves about the tub grinder. The ramp member and stabilizer member also serve to help prevent material from falling into and clogging the grinder when the tub grinder is shut down or slowed down by a power governor.