Abstract: A light emitting device includes a semiconductor nanocrystal in a layer. The layer can be a monolayer of semiconductor nanocrystals. The monolayer can form a pattern on a substrate.

Abstract: Displays including hybrid pixels including an OLED subpixel and QD-LED subpixel are described. In an embodiment, OLED and QD-LED stacks are integrated into the same pixel with multiple common layers shared by the OLED and QD-LED stacks.

Abstract: A display may have an array of pixels. Each pixel may have a light-emitting diode such as an organic light-emitting diode or may be formed from other pixel structures such as liquid crystal display pixel structures. The pixels may emit light such as red, green, and blue light. An angle-of-view adjustment layer may overlap the array of pixels. During operation, light from the pixels passes through the angle-of-view adjustment layer to a user. The viewing angle for the user is enhanced as the angular spread of the emitted light from the pixels is enhanced by the angle-of-view adjustment layer. The angle-of-view adjustment layer may be formed from holographic structures recorded by applying laser beams to a photosensitive layer or may be formed from a metasurface that is created by patterning nanostructures on the display using printing, photolithography, or other patterning techniques.

Abstract: A display may have display layers that form an array of pixels. The display layers may include a first layer that includes a light-blocking matrix and a second layer that overlaps the first layer. The first layer may include quantum dot elements formed in openings in the light-blocking matrix. The light-blocking matrix may be formed from a reflective material such as metal. The second layer may include color filter elements that overlap corresponding quantum dot elements in the first layer. Substrate layers may be used to support the first and second layers and to support thin-film transistor circuitry that is used in controlling light transmission through the array of pixels. The display layers may include a liquid crystal layer, polarizer layers, filter layers for reflecting red and green light and/or other light to enhance light recycling, and layers with angularly dependent transmission characteristics.

Abstract: A method of making a device comprises forming a layer comprising quantum dots over a substrate including a first electrode, fixing the layer comprising quantum dots formed over the substrate, and exposing at least a portion of, and preferably all, exposed surfaces of the fixed layer comprising quantum dots to small molecules. The layer comprising quantum dots can be preferably fixed in the absence or substantial absence of oxygen. Also disclosed is a method of making a device comprises forming a layer comprising quantum dots over a substrate including a first electrode, exposing the layer comprising quantum dots to small molecules and light flux.

Abstract: Display panels and methods of manufacture are described for down converting a peak emission wavelength of a pump LED within a subpixel with a quantum dot layer. In some embodiments, pump LEDs with a peak emission wavelength below 500 nm, such as between 340 nm and 420 nm are used. QD layers in accordance with embodiments can be integrated into a variety of display panel structures including a wavelength conversion cover arrangement, QD patch arrangement, or QD layers patterned on the display substrate.

Abstract: A composition useful for altering the wavelength of visible or invisible light is disclosed. The composition comprising a solid host material and quantum confined semiconductor nanoparticles, wherein the nanoparticles are included in the composition in amount in the range from about 0.001 to about 15 weight percent based on the weight of the host material. The composition can further include scatterers. An optical component including a waveguide component and quantum confined semiconductor nanoparticles is also disclosed. A device including an optical component is disclosed. A system including an optical component including a waveguide component and quantum confined semiconductor nanoparticles and a light source optically coupled to the waveguide component is also disclosed. A decal, kit, ink composition, and method are also disclosed. A TFEL including quantum confined semiconductor nanoparticles on a surface thereof is also disclosed.

Abstract: Light-emitting devices and displays with improved performance are disclosed. A light-emitting device includes a first electrode including an anode opposite a second electrode including a cathode, a hole injection layer adjacent the first electrode, a hole transporting layer disposed on the hole injection layer, and an emissive layer of inorganic semiconductor nanocrystals disposed between the hole transporting layer and the second electrode. The inorganic semiconductor nanocrystals comprising a plurality of semiconductor nanocrystals capable of emitting light upon excitation.

Abstract: A method for preparing semiconductor nanocrystals comprises reacting cation precursors and anion precursors in a reaction mixture including one or more acids, one or more phenol compounds, and a solvent to produce semiconductor nanocrystals having a predetermined composition. A method for forming a coating on at least a portion of a population of semiconductor nanocrystals is also disclosed. The method comprises forming a first mixture including a population of semiconductor nanocrystals, one or more amine compounds, and a first solvent; adding cation precursors and anion precursors to the first mixture at a temperature sufficient for growing a semiconductor material on at least a portion of an outer surface of at least a portion of the population of semiconductor nanocrystals; and initiating addition of one or more acids to the first mixture after addition of the cation and anion precursors is initiated. Semiconductor nanocrystals and populations thereof are also disclosed.

Abstract: A quantum dot including a fluorine-containing ligand attached to a surface thereof and having a coating comprising a fluoropolymer over at least a portion of the outer surface of the quantum dot. A method for preparing a quantum dot with a coating comprising a fluoropolymer over at least a portion of the outer surface of the quantum dot is also disclosed. The method comprises contacting a quantum dot having a fluorine-containing ligand attached to a surface thereof with a fluoropolymer to coat the fluoropolymer over at least a portion of the outer surface of the quantum dot. A device including the quantum dot taught herein is further disclosed. An emissive material including the quantum dot taught herein is further disclosed.

Abstract: A composition useful for altering the wavelength of visible or invisible light is disclosed. The composition comprising a solid host material and quantum confined semiconductor nanoparticles, wherein the nanoparticles are included in the composition in amount in the range from about 0.001 to about 15 weight percent based on the weight of the host material. The composition can further include scatterers. An optical component including a waveguide component and quantum confined semiconductor nanoparticles is also disclosed. A device including an optical component is disclosed. A system including an optical component including a waveguide component and quantum confined semiconductor nanoparticles and a light source optically coupled to the waveguide component is also disclosed. A decal, kit, ink composition, and method are also disclosed. A TFEL including quantum confined semiconductor nanoparticles on a surface thereof is also disclosed.

Abstract: Quantum dot layers and display devices including quantum dot layers are described. In an embodiment the quantum dot layer includes quantum dots with coatings to adjust the spacing between adjacent quantum dots. In an embodiment, the coatings are metal oxide coatings and may create a charge transporting matrix. In an embodiment, the coatings are core-material coatings. The QD layers may be QD-LED compatible.

Abstract: Light-emitting devices and displays with improved performance are disclosed. A light-emitting device includes an emissive material disposed between a first electrode, and a second electrode. Various embodiments include a device having a peak external quantum efficiency of at least about 2.2%; a device that emits light having a CIE color coordinate of x greater than 0.63; a device having an external quantum efficiency of at least about 2.2 percent when measured at a current density of 5 mA/cm2. Also disclosed is a light-emitting device comprising a plurality of semiconductor nanocrystals capable of emitting red light upon excitation, wherein the device has a peak luminescent efficiency of at least about 1.5 lumens per watt. Also disclosed is a light-emitting device comprising a plurality of semiconductor nanocrystals capable of emitting red light upon excitation, wherein the device has a luminescent efficiency of at least about 1.

Abstract: The present inventions relate to optical components which include quantum confined semiconductor nanoparticles, wherein at least a portion of the nanoparticles include a ligand attached to a surface thereof, the ligand being represented by the formula: X-Sp-Z, wherein: X represents a primary amine group, a secondary amine group, a urea, a thiourea, an imidizole group, an amide group, an other nitrogen containing group, a carboxylic acid group, a phosphonic or arsonic acid group, a phosphinic or arsinic acid group, a phosphate or arsenate group, a phosphine or arsine oxide group; Sp represents a spacer group, such as a group capable of allowing a transfer of charge or an insulating group; and Z represents: (i) a reactive group capable of communicating specific chemical properties to the nanocrystal as well as provide specific chemical reactivity to the surface of the nanocrystal, and/or (ii) a group that is cyclic, halogenated, or polar a-protic.

Abstract: Quantum dot layers and display devices including quantum dot layers are described. In an embodiment the quantum dot layer includes quantum dots with metal oxide coatings to adjust the spacing between adjacent quantum dots. In an embodiment, the metal oxide coatings may create a charge transporting matrix, be QD-LED compatible.

Abstract: Quantum dot layers and display devices including quantum dot layers are described. In an embodiment the quantum dot layer includes quantum dots with metal oxide coatings to adjust the spacing between adjacent quantum dots. In an embodiment, the metal oxide coatings may create a charge transporting matrix, be QD-LED compatible.

Abstract: A method for preparing semiconductor nanocrystals is disclosed. The method includes adding one or more cation precursors and one or more anion precursors in a reaction mixture including a solvent in a reaction vessel, maintaining the reaction mixture at a first temperature and for a first time period sufficient to produce semiconductor nanocrystal seed particles of the cation and the anion, and maintaining the reaction mixture at a second temperature that is higher than the first temperature for a second time period sufficient to enlarge the semiconductor nanocrystal seed particles to produce semiconductor nanocrystals from the cation and the anion.

Abstract: Displays including hybrid pixels including an OLED subpixel and QD-LED subpixel are described. In an embodiment, OLED and QD-LED stacks are integrated into the same pixel with multiple common layers shared by the OLED and QD-LED stacks.

Abstract: The present inventions relate to optical components which include quantum confined semiconductor nanoparticles, wherein at least a portion of the nanoparticles include a ligand attached to a surface thereof, the ligand being represented by the formula: X-Sp-Z, wherein: X represents a primary amine group, a secondary amine group, a urea, a thiourea, an imidizole group, an amide group, an other nitrogen containing group, a carboxylic acid group, a phosphonic or arsonic acid group, a phosphinic or arsinic acid group, a phosphate or arsenate group, a phosphine or arsine oxide group; Sp represents a spacer group, such as a group capable of allowing a transfer of charge or an insulating group; and Z represents: (i) a reactive group capable of communicating specific chemical properties to the nanocrystal as well as provide specific chemical reactivity to the surface of the nanocrystal, and/or (ii) a group that is cyclic, halogenated, or polar a-protic.

Abstract: A display may be provided with light sources. The light sources may include light emitting diodes. The light sources may have packages formed from package bodies to which the light-emitting diodes are mounted. Layers such as quantum dot layers, light-scattering layers, spacer layers, and diffusion barrier layers may be formed over the package bodies and light-emitting diodes. Quantum dots of different colors may be stacked on top of each other. A getter may be incorporated into one or more of the layers to getter oxygen and water. Quantum dots may be formed from semiconductor layers that are doped with n-type and p-type dopant to adjust the locations of their conduction and valance bands and thereby enhanced quantum dot performance.