A light emitting component comprising a light source (10) for emitting blue light (aa), a first layer (1) comprising a red phosphor, and a second layer (2) comprising luminescent crystals (20). Upon absorption of the light emitted by the light source (10), the luminescent crystals (20) emit light of a wavelength in the green light spectrum (cc). The first layer (1) is arranged adjacent to the light source (10). The second layer (2) is arranged remotely from the first layer (1).

The present invention relates to a divalent manganese-doped all-inorganic perovskite quantum dot glass, and constituents of the divalent manganese-doped all-inorganic perovskite quantum dot glass are as follows: B.sub.2O.sub.3: 25%-45%, SiO.sub.2: 25%-45%, MCO.sub.3: 1%-10%, Al.sub.2O.sub.3: 1%-10%, ZnO: 1%-5%, Cs.sub.2CO.sub.3: 1%-10%, PbCl.sub.2: 1%-10%, NaCl: 1%-10%, MnCl.sub.2: 1%-10%, wherein M is Ca, Sr or Ba. Preparation of the quantum dot glass is as follows: grinding each raw constituent materials and mixing well to form a mixture, melting the mixture, followed by molding, annealing and performing thermal treatment. By the thermal treatment at different temperatures, a divalent manganese-doped quantum dot glass can be obtained. The divalent manganese ions doped perovskite quantum dot glass is a kind of light-emitting material with great application prospect, for possessing good stability and rather high fluorescence quantum yield.

An electronic device including first to third light emitting regions and a dummy region is provided. The electronic device includes a base layer, and a display element layer including a pixel defining film on the base layer, light emitting elements divided by the pixel defining film, and a reduction preventing layer containing a reduction preventing agent, and the light emitting elements each include an electron transport region containing a metal oxide. The electronic device may have improved electron transport function of the electron transport region by the reduction preventing agent contained in the reduction preventing layer, thereby improving the luminous efficiency.

A nanocrystal with a large Stokes shift includes a matrix domain having a composition of M1.sub.xM2.sub.yA.sub.z, and a plurality of seed domains which are distributed in the matrix domain and each of which has a composition of M1.sub.x′M2.sub.y′A.sub.z′, wherein M1, M2, A, x, y, z, x′, y′, and z′ are as defined herein.

Ruggedized luminescent nanoparticle tracers have luminescent nanoparticle cores coupled to a luminescent substrate. The substrate is a large-particle size phosphor, while the nanoparticles are photoluminescent quantum dots (QDs) whose emission spectra can be tuned based on their chemical composition, size, and fabrication (e.g., dopants). The QDs are encapsulated by a protective layer to form a nanoparticle core. The protective layer can shield the QDs from external environments that would otherwise damage the delicate QDs. The substrate is also encapsulated by a protective layer, and the protective layer of the nanoparticle core is coupled to the protective layer of the substrate via a molecular linker to form a tracer particle complex. The tracer particle complexes can be disposed in a silicate suspension for subsequent use.

A spontaneous emission type photo conversion substance for light therapy which outputs a specific wavelength, a functional patch, and functional mask pack comprising the same are provided. The photo conversion substance is designed to use a sapphire-based blue axial light fluorescent substance to light exciting in the core, have a relatively long light emission time, and absorb light exciting by selecting a wavelength at the shell part for light emission. The photo conversion substance has a structure capable of selecting a wavelength in order to efficiently express the light therapy function, which is included in the functional patch and functional mask pack.

Present invention provides a process for the synthesis of size and composition tunable colloidal PbMgS core and PbMgS/MS core shell quantum dots emitting in the near infrared (NIR) region of the spectrum in a single operation in a continuous flow reactor. M includes at least one of Cd, Mg, Zn and Cu metals.

Photovoltaic cells are fabricated in which the compositions of the light-absorbing layer and the electron-accepting layer are selected such that at least one side of the junction between these two layers is substantially depleted of charge carriers, i.e., both free electrons and free holes, in the absence of solar illumination. In further aspects of the invention, the light-absorbing layer is comprised of dual-shell passivated quantum dots, each having a quantum dot core with surface anions, an inner shell containing cations to passivate the core surface anions, and an outer shell to passivate the inner shell anions and anions on the core surface.

In certain embodiments, a first semiconductor material is vaporized to generate a vapor phase condensate. The vapor phase condensate is allowed to form nanoparticles. The nanoparticles are annealed to yield nanoparticles or cores. The cores are overcoated by introducing a solution containing second semiconductor material precursors in a coordinating solvent into a suspension of cores at a desired elevated temperature and mixing for a period of time sufficient to cause diffusion of the shell into the core. The diffusion of the shell into the core causes the quantum dots to exhibit a broadened optical emission. The produced quantum dots may be incorporated into a quantum dot based radiation source.

The present invention relates to a divalent manganese-doped all-inorganic perovskite quantum dot glass, and constituents of the divalent manganese-doped all-inorganic perovskite quantum dot glass are as follows: B.sub.2O.sub.3: 25%-45%, SiO.sub.2: 25%-45%, MCO.sub.3: 1%-10%, Al.sub.2O.sub.3: 1%-10%, ZnO: 1%-5%, Cs.sub.2CO.sub.3: 1%-10%, PbCl.sub.2: 1%-10%, NaCl: 1%-10%, MnCl.sub.2: 1%-10%, wherein M is Ca, Sr or Ba. Preparation of the quantum dot glass is as follows: grinding each raw constituent materials and mixing well to form a mixture, melting the mixture, followed by molding, annealing and performing thermal treatment. By the thermal treatment at different temperatures, a divalent manganese-doped quantum dot glass can be obtained. The divalent manganese ions doped perovskite quantum dot glass is a kind of light-emitting material with great application prospect, for possessing good stability and rather high fluorescence quantum yield.