Abstract:
A method for formulating a CIGS nanoparticle-based ink, which can be processed to form a thin film with a crack-free limit (CFL) of 500 nm or greater, comprises combining CIGS nanoparticles and binary chalcogenide nanoparticles in a solvent.
Abstract:
Compositions and methods are described for detecting and treating conditions including cancer with target specific quantum dot nano-devices. In some aspects, nanoparticle conjugates are provided having multiple target specificities and include surface modified, water soluble quantum dot (QD) nanoparticles each of which are chemically conjugated to at least two different target specific ligands.
Abstract:
The present disclosure relates to a plurality of quantum dot nanoparticles conjugated to ligands, and in particular a plurality of quantum dot nanoparticles wherein each nanoparticle is conjugated to an exosome-specific binding ligand. The present disclosure also relates to methods of making such a plurality of conjugated quantum dot nanoparticles, methods of detecting exosomes using such a plurality of conjugated quantum dot nanoparticles and methods of detecting exosomes using such a plurality of conjugated quantum dot nanoparticles.
Abstract:
A method of synthesis of two-dimensional (2D) nanoflakes comprises the cutting of prefabricated nanoparticles. The method allows high control over the shape, size and composition of the 2D nanoflakes, and can be used to produce material with uniform properties in large quantities. Van der Waals heterostructure devices are prepared by fabricating nanoparticles, chemically cutting the nanoparticles to form nanoflakes, dispersing the nanoflakes in a solvent to form an ink, and depositing the ink to form a thin film.
Abstract:
It has been discovered that certain silicon-containing, surface-modifying ligands can be used to make semiconductor nanopartides (quantum dots) more compatible with polysiloxanes. Quantum dots dispersed in a polysiloxane matrix may be used, for example, in light-emitting devices to alter the emission spectrum of such devices.
Abstract:
An LED device has a cap containing one or more quantum dot (QD) phosphors. The cap may be sized and configured to be integrated with standard LED packages. The QD phosphor may be held within the well of the LED package, so as to absorb the maximum amount of light emitted by the LED, but arranged in spaced-apart relation from the LED chip to avoid excessive heat that can lead to degradation of the QD phosphor(s). The packages may be manufactured and stored for subsequent assembly onto an LED device.
Abstract:
A method for the preparation of copper indium gallium diselenide/disulfide (CIGS) nanoparticles utilizes a copper-rich stoichiometry. The copper-rich CIGS nanoparticles are capped with organo-chalcogen ligands, rendering the nanoparticles processable in organic solvents. The nanoparticles may be deposited on a substrate and thermally processed in a chalcogen-rich atmosphere to facilitate conversion of the excess copper to copper selenide or copper sulfide that may act as a sintering flux to promote liquid phase sintering and thus the growth of large grains. The nanoparticles so produced may be used to fabricate CIGS-based photovoltaic devices.
Abstract:
Disclosed herein are CIGS-based photon-absorbing layers disposed on a substrate. The photon-absorbing layers are useful in photovoltaic devices. The photon absorbing-layer is made of a semiconductor material having empirical formula AB1-xB'xC2-yC'y, where A is Cu, Zn, Ag or Cd; B and B' are independently A1, In or Ga; C and C' are independently S, or Se, and wherein 0 ≤ x ≤ 1; and 0 ≤ y ≤ 2. The grain size of the semiconductor material and the composition of the semiconductor material both vary as a function of depth across the layer. The layers described herein exhibit improved photovoltaic properties, including increased shunt resistance and decreased backside charge carrier recombination.
Abstract:
Disclosed herein are articles for use in phototherapy utilizing quantum dots (QDs). One embodiment is a medical dressing having an occlusive layer and translucent layer. Quantum dot light-emitting diode chips are configured within the occlusive layer to provide light of a specific wavelength for use in phototherapy. Another embodiment is a medical dressing having an occlusive layer and translucent layer, wherein quantum dot material is embedded or impregnated within one or both layers.
Abstract:
Photovoltaic (PV) devices and solution-based methods of making the same are described. The PV devices include a CIGS-type absorber layer formed on a molybdenum substrate. The molybdenum substrate includes a layer of low- density molybdenum proximate to the absorber layer. The presence of low- density molybdenum proximate to the absorber layer has been found to promote the growth of large grains of CIGS-type semiconductor material in the absorber layer.