Abstract: A photovoltaic device includes a heat transfer material comprising a dispersion of down-conversion quantum dots in a host medium. In certain embodiments, the host medium comprises a liquid or fluid. In certain embodiments, a heat transfer material comprises a dispersion of down-conversion quantum dots in a host medium comprising one or more heat-transfer fluids. A heat transfer material including quantum dots is also disclosed. Such devices and heat transfer materials can be useful for light energy conversion, e.g., in solar cells. Solar cells are also disclosed.

Abstract: A composite including a first layer comprising nanoparticles, at least a portion of which include a ligand attached to a surface of a nanoparticle, and a second layer disposed over a predetermined area of the first layer, wherein the second layer is continuous or uninterrupted by voids across the predetermined area, and has a thickness less than or equal to about 30 nm. In certain preferred embodiments, there is a chemical affinity between the ligand and the second layer. A device including the above composite and related methods are also disclosed.

Abstract: Light emitting devices and devices with improved performance are disclosed. In one embodiment, a light emitting device includes an emissive material disposed between a first electrode, and a second electrode, wherein the emissive material comprises semiconductor nanocrystals capable of emitting light including a maximum peak emission in the blue region of the spectrum upon excitation, wherein the light emitting device can have a peak external quantum efficiency of at least about 1.0 percent. Also disclosed is a display including at least one light emitting device including an emissive material disposed between a first electrode, and a second electrode, wherein the at least one light emitting device can have a peak external quantum efficiency of at least about 1.0 percent. In another embodiment, a light emitting device includes an emissive material disposed between a first electrode and a second electrode.

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: Methods for depositing nanomaterial onto a substrate are disclosed. Also disclosed are compositions useful for depositing nanomaterial, methods of making devices including nanomaterials, and a system and devices useful for depositing nanomaterials.

Abstract: Methods for depositing material and nanomaterial onto a substrate are disclosed. Also disclosed are methods of making devices including nanomaterials, and a system useful for depositing materials and nanomaterials.

Abstract: A speech detection system is provided with multiple speech detector sub-systems. The speech detection sub-systems employ distinct statistical methods for determining whether speech is present in an electronic communication signal received at an output terminal. For example, a first speech detection sub-system employs moving average peak signal filter, a second speech detection sub-system employing a moving average noise filter, and a third speech detection sub-system employs a variance filter. Signals from each of the filters are compared with respective threshold values, and the threshold values are provided to speech determination logic for making an aggregate speech detection decision. The speech detection system is useful for telephonic automatic gain control.