Abstract: A photodetector includes a first electrode; an interlayer disposed on the first electrode; a photoabsorbing layer disposed on the interlayer, the photoabsorbing layer having one or more charge transport materials, and a plurality of two-dimensional quantum dots (2D QDs) dispersed in the one or more charge transport material; and a second electrode disposed on the photoabsorbing layer. A heterostructure photodetector includes a first electrode; a first photoabsorbing layer disposed on the first electrode, the first photoabsorbing layer having a first photoabsorbing material; a second photoabsorbing layer disposed on the first photoabsorbing layer, the second photoabsorbing layer having a second photoabsorbing material; and a second electrode disposed on the second photoabsorbing layer.

Abstract: A method of producing nanoparticles comprises effecting conversion of a molecular cluster compound to the material of the nanoparticles. The molecular cluster compound comprises a first ion and a second ion to be incorporated into the growing nanoparticles. The conversion can be effected in the presence of a second molecular cluster compound comprising a third ion and a fourth ion to be incorporated into the growing nanoparticles, under conditions permitting seeding and growth of the nanoparticles via consumption of a first molecular cluster compound.

Abstract: Methods for the synthesis of a polyoxometalate compounds include heating a metal precursor in the presence of an organic salt. The polyoxometalate compounds produced herein display high photoluminescence quantum yields and photoluminescence maximums in the blue and/or violet regions of the electromagnetic spectrum.

Abstract: Emissive layers for electroluminescent display devices are described herein. The emissive layer can include a two-dopant system having a population of quantum dots (QDs) and a population of molecules exhibiting thermally activated delayed fluorescence (TADF). In some instances, one or both of the QDs and TADF molecules can be disposed in a host matrix. In some instances, the QDs and TADF molecules can be disposed in separate host matrices. In some instances, an electroluminescent display device can include an emissive layer comprising a population of quantum dots (QDs) and a layer adjacent to the emissive layer, the adjacent layer comprising a population of molecules exhibiting thermally activated delayed fluorescence (TADF).

Abstract: An emissive layer of an electroluminescent device, such as an electroluminescent display device, includes a host matrix and a two-dopant system dispersed in the host matrix. The two-dopant system has a fluorescent emitter dopant and an emissive donor-assistant dopant. The emissive donor-assistant dopant can be a fluorescence donor-assistant dopant or a phosphorescence donor-assistant dopant. The physical distance between the fluorescent emitter dopant and the emissive donor-assistant dopant can be controlled by using various capping ligands, which are bound to a surface of the fluorescent emitter dopant.

Abstract: The application describes pellets comprising particulate iron ore and between 0.05 and 1.0% by weight of an organic binder. The use of such pellets in electric arc furnaces to produce steel is also described.

Abstract: Quantum dot semiconductor nanoparticle compositions that incorporate ions such as zinc, aluminum, calcium, or magnesium into the quantum dot core have been found to be more stable to Ostwald ripening. A core-shell quantum dot may have a core of a semiconductor material that includes indium, magnesium, and phosphorus ions. Ions such as zinc, calcium, and/or aluminum may be included in addition to, or in place of, magnesium. The core may further include other ions, such as selenium, and/or sulfur. The core may be coated with one (or more) shells of semiconductor material. Example shell semiconductor materials include semiconductors containing zinc, sulfur, selenium, iron and/or oxygen ions.

Abstract: Materials and methods for preparing Cu2XSnY4 nanoparticles, wherein X is Zn, Cd, Hg, Ni, Co, Mn or Fe and Y is S or Se, (CXTY) are disclosed herein. The nanoparticles can be used to make layers for use in thin film photovoltaic (PV) cells. The CXTY materials are prepared by a colloidal synthesis in the presence of labile organo-chalcogens. The organo-chalcogens serves as both a chalcogen source for the nanoparticles and as a capping ligand for the nanoparticles.

Abstract: A lighting fixture for promoting the development of animals comprises a backlight, such as an LED or an array of LEDs, and a series of one or more retractable, rotatable or interchangeable lenses comprising quantum dots, such that the color and/or color temperature of the light emitted by the lighting fixture can be altered and optimized during animal development. A lighting fixture adapted for use on an aquarium may be in the form factor of a standard fluorescent tube and comprise one or more LEDs and a quantum dot-containing film for down-converting at least a portion of the light emitted by the LEDs so as to provide optimum wavelengths for photosynthesis by aquarium plants while simultaneously providing attractive display lighting for the aquarium fish.

Abstract: A light emitting layer including a plurality of light emitting particles embedded within a host matrix material. Each of said light emitting particles includes a population of semiconductor nanoparticles embedded within a polymeric encapsulation medium. A method of fabricating a light emitting layer comprising a plurality of light emitting particles embedded within a host matrix material, each of said light emitting particles comprising a population of semiconductor nanoparticles embedded within a polymeric encapsulation medium. The method comprises providing a dispersion containing said light emitting particles, depositing said dispersion to form a film, and processing said film to produce said light emitting layer.

Abstract: A photodetector includes a first electrode; an interlayer disposed on the first electrode; a photoabsorbing layer disposed on the interlayer, the photoabsorbing layer having one or more charge transport materials, and a plurality of two-dimensional quantum dots (2D QDs) dispersed in the one or more charge transport material; and a second electrode disposed on the photoabsorbing layer. A heterostructure photodetector includes a first electrode; a first photoabsorbing layer disposed on the first electrode, the first photoabsorbing layer having a first photoabsorbing material; a second photoabsorbing layer disposed on the first photoabsorbing layer, the second photoabsorbing layer having a second photoabsorbing material; and a second electrode disposed on the second photoabsorbing layer.

Abstract: Methods for the synthesis of a polyoxometalate compounds include heating a metal precursor in the presence of an organic salt. The polyoxometalate compounds produced herein display high photoluminescence quantum yields and photoluminescence maximums in the blue and/or violet regions of the electromagnetic spectrum.

Abstract: Quantum dot semiconductor nanoparticle compositions that incorporate ions such as zinc, aluminum, calcium, or magnesium into the quantum dot core have been found to be more stable to Ostwald ripening. A core-shell quantum dot may have a core of a semiconductor material that includes indium, magnesium, and phosphorus ions. Ions such as zinc, calcium, and/or aluminum may be included in addition to, or in place of, magnesium. The core may further include other ions, such as selenium, and/or sulfur. The core may be coated with one (or more) shells of semiconductor material. Example shell semiconductor materials include semiconductors containing zinc, sulfur, selenium, iron and/or oxygen ions.

Abstract: Quantum dot semiconductor nanoparticle compositions that incorporate ions such as zinc, aluminum, calcium, or magnesium into the quantum dot core have been found to be more stable to Ostwald ripening. A core-shell quantum dot may have a core of a semiconductor material that includes indium, magnesium, and phosphorus ions. Ions such as zinc, calcium, and/or aluminum may be included in addition to, or in place of, magnesium. The core may further include other ions, such as selenium, and/or sulfur. The core may be coated with one (or more) shells of semiconductor material. Example shell semiconductor materials include semiconductors containing zinc, sulfur, selenium, iron and/or oxygen ions.

Abstract: A light emitting layer including a plurality of light emitting particles embedded within a host matrix material. Each of said light emitting particles includes a population of semiconductor nanoparticles embedded within a polymeric encapsulation medium. A method of fabricating a light emitting layer comprising a plurality of light emitting particles embedded within a host matrix material, each of said light emitting particles comprising a population of semiconductor nanoparticles embedded within a polymeric encapsulation medium. The method comprises providing a dispersion containing said light emitting particles, depositing said dispersion to form a film, and processing said film to produce said light emitting layer.

Abstract: A light emitting layer including a plurality of light emitting particles embedded within a host matrix material. Each of said light emitting particles includes a population of semiconductor nanoparticles embedded within a polymeric encapsulation medium. A method of fabricating a light emitting layer comprising a plurality of light emitting particles embedded within a host matrix material, each of said light emitting particles comprising a population of semiconductor nanoparticles embedded within a polymeric encapsulation medium. The method comprises providing a dispersion containing said light emitting particles, depositing said dispersion to form a film, and processing said film to produce said light emitting layer.

Abstract: A method of producing nanoparticles comprises effecting conversion of a molecular cluster compound to the material of the nanoparticles. The molecular cluster compound comprises a first ion and a second ion to be incorporated into the growing nanoparticles. The conversion can be effected in the presence of a second molecular cluster compound comprising a third ion and a fourth ion to be incorporated into the growing nanoparticles, under conditions permitting seeding and growth of the nanoparticles via consumption of a first molecular cluster compound.

Abstract: Light-emitting materials are made from a porous light-emitting semiconductor having quantum dots (QDs) disposed within the pores. According to some embodiments, the QDs have diameters that are essentially equal in size to the width of the pores. The QDs are formed in the pores by exposing the porous semiconductor to gaseous QD precursor compounds, which react within the pores to yield QDs. According to certain embodiments, the pore size limits the size of the QDs produced by the gas-phase reactions. The QDs absorb light emitted by the light-emitting semiconductor material and reemit light at a longer wavelength than the absorbed light, thereby “down-converting” light from the semiconductor material.

Abstract: A method of producing nanoparticles comprises effecting conversion of a nanoparticle precursor composition to the material of the nanoparticles. The nanoparticle precursor composition comprises a first precursor species containing a group 13 element to be incorporated into the nanoparticles and a separate second precursor species containing either a group 15 or a group 16 element to be incorporated into the nanoparticles. The conversion is effected in the presence of molecular cluster compounds under conditions permitting seeding and growth of the nanoparticles on the molecular cluster compounds. The molecular cluster compounds and nanoparticle precursor composition can be dissolved in a solvent at a first temperature to form a solution and the temperature of the solution can then be increased to a second temperature sufficient to initiate seeding and growth of the nanoparticles on the molecular cluster compounds.

Abstract: A light emitting layer including a plurality of light emitting particles embedded within a host matrix material. Each of said light emitting particles includes a population of semiconductor nanoparticles embedded within a polymeric encapsulation medium. A method of fabricating a light emitting layer comprising a plurality of light emitting particles embedded within a host matrix material, each of said light emitting particles comprising a population of semiconductor nanoparticles embedded within a polymeric encapsulation medium. The method comprises providing a dispersion containing said light emitting particles, depositing said dispersion to form a film, and processing said film to produce said light emitting layer.