A semiconductor device used for fluorescent-based molecule detection and a method for manufacturing the same are provided. The semiconductor device has a fluid channel layer defining a fluid channel through which a sample stream flows. A target cell coupled with a fluorescent source is contained by the sample stream. The semiconductor device also has an excitation light source for generating excitation light that reaches the target cell coupled with the fluorescent source to generate fluorescent light. The semiconductor device also has a light filter layer for permitting the fluorescent light to pass through and to block the excitation light and a light detection layer for detecting the fluorescent light. The functional components of the device are highly integrated. Leakage of the excitation light and background noise into the light detection component can be minimized to improve the quality of detection.

The invention relates to an optoelectronic light-emitting device (1), including: at least one light-emitting diode (40) having an emitting surface (44) adapted to emit so-called excitation luminous radiation; and a photoluminescent material (31) that coats the emitting surface (44), the photoluminescent material containing photoluminescent particles adapted to convert said excitation luminous radiation through the emitting surface (44) at least in part into so-called photoluminescence luminous radiation.

The optoelectronic device includes at least one photodiode (50) adjacent the light-emitting diode (40) having a receiving surface (54) coated by the photoluminescent material (31) and adapted to detect at least part of the excitation radiation and/or the photoluminescence radiation coming from the photoluminescent material (31) through the receiving surface.

A thermophotovoltaic (TPV) converter includes spectrally-selective metamaterial emitters disposed on peripheral walls of an all-metal box-like enclosure, and associated photovoltaic (PV) cells configured to efficiently convert in-band photons having optimal conversion spectrums into electricity. The peripheral walls surround a substantially rectangular interior cavity having an inlet opening through which heat energy (e.g., concentrated sunlight) is supplied, and an outlet opening through which waste heat exits the cavity. Concentrated sunlight passing through the box-like enclosure heats the peripheral walls to a high temperature (i.e., above 1000 K), causing thermally excited surface plasmons generated on the emitters' concentric circular ridges to produce highly-directional radiant energy beams having a peak emission wavelength roughly equal to a fixed grating period separating the ridges. The metamaterial emitter is optionally provided with multiple bull's eye structures in a multiplexed (overlapping) pattern and with different grating periods to produce a broad emission spectrum overlapping the optimal conversion spectrum.

Provided is a light-emitting element with high external quantum efficiency and a low drive voltage. The light-emitting element includes a light-emitting layer which contains a phosphorescent compound and a material exhibiting thermally activated delayed fluorescence between a pair of electrodes, wherein a peak of a fluorescence spectrum and/or a peak of a phosphorescence spectrum of the material exhibiting thermally activated delayed fluorescence overlap(s) with a lowest-energy-side absorption band in an absorption spectrum of the phosphorescent compound, and wherein the phosphorescent compound exhibits phosphorescence in the light-emitting layer by voltage application between the pair of electrodes.

The present invention relates to a nanophosphor which may be used as a wavelength conversion part of a solar cell, a fluorescent contrast agent, and a light emitting part of a display device, and a synthesis method thereof. The nanophosphor of the present invention is excited by ultraviolet light to exhibit strong green light emission, and has multicolor light emission characteristics capable of controlling a color such as green, yellowish green, yellow, and orange color by only adjusting the amount of a doping agent.

Luminescent materials and methods of forming such materials are described herein. A method of forming a luminescent material includes: (1) providing a source of A and X, wherein A is selected from at least one of elements of Group 1, and X is selected from at least one of elements of Group 17; (2) providing a source of B, wherein B is selected from at least one of elements of Group 14; (3) subjecting the source of A and X and the source of B to vacuum deposition to form a precursor layer over a substrate; (4) forming an encapsulation layer over the precursor layer to form an assembly of layers; and (5) heating the assembly of layers to a temperature T.sub.heat to form a luminescent material within the precursor layer.

A photo detector and a method for fabricating the same are provided. The photo detector includes a first substrate and a photo conversion element. The first substrate has a sensor element array for receiving a light with a spectrum in a specific wavelength range. The photo conversion element is disposed on the sensor element array, where the photo conversion element includes a photo conversion material layer and a doped photo conversion material column structure layer. A luminescent spectrum of the doped photo conversion material layer column structure layer is overlapped with the spectrum in a specific wavelength range, and a luminescent spectrum of the photo conversion material layer is non-overlapped with the spectrum in a specific wavelength range.

An optical sensor is installed in a device, and includes a light-emitting element, and a light-receiving element for receiving light emitted from the light-emitting element and traveling through a space. The optical sensor detects an object present in the space, based on a change of the light impinging upon the object. A first optical waveguide is connected to the light-emitting element so as to be capable of light propagation. The first optical waveguide has a front end portion serving as a light exit portion for exiting light emitted from the light-emitting element. A second optical waveguide is connected to the light-receiving element so as to be capable of light propagation. The second optical waveguide has a front end portion serving as a light entrance portion for receiving light exiting from the light exit portion of the first optical waveguide and traveling through the space.

Solid-state radiation transducer (SSRT) devices and methods of manufacturing and using SSRT devices are disclosed herein. One embodiment of the SSRT device includes a radiation transducer (e.g., a light-emitting diode) and a transmissive support assembly including a transmissive support member, such as a transmissive support member including a converter material. A lead can be positioned at a back side of the transmissive support member. The radiation transducer can be flip-chip mounted to the transmissive support assembly. For example, a solder connection can be present between a contact of the radiation transducer and the lead of the transmissive support assembly.

The invention provides a luminescent nano particles based luminescent material comprising a matrix of interconnected coated luminescent nano particles, wherein for instance wherein the luminescent nano particles comprise CdSe, wherein the luminescent nano particles comprise a coating of CdS and wherein the matrix comprises a coating comprising ZnS. The luminescent material according may have a quantum efficiency of at least 80% at 25 C., and having a quench of quantum efficiency of at maximum 20% at 100 C. compared to the quantum efficiency at 25 C.