A photo-emissive film is provided. The photo-emissive film is formed from a luminescent layer that is substantially transparent to at least one excitation wavelength and at least one emission wavelength. The luminescent layer has a first refractive index. A plurality of lenslets is at least partially embedded in the luminescent layer of the photo-emissive film in a substantially single plane. The plurality of lenslets has a second refractive index. The focal point of the plurality of lenslets is external to the plurality of lenslets and within the luminescent layer. The luminescent layer is formed from a polymer, a crystalline material, a glass, or mixtures thereof.

The disclosure comprises novel Coelenterazine compounds and methods of use, including a simple delivery device for the photoprotein to create effects by their luminous reaction upon contact with surfaces that contain calcium. Calcium is ubiquitous in and on most surfaces and in the environment; it is this unique property of calcium that makes this a novel use of the photoproteins for entertainment. A base coelenterazine structure is depicted below. ##STR00001##

The present disclosure relates to luminescent including photon up-conversion nanoparticles. These nanoparticles dude a polymeric organic matrix, at least one light emitter distributed within this matrix, a stabilizing agent, and at least one metal particle enclosed within the matrix, wherein the metal particles are plasmonic nanoparticles. The present disclosure further relates to methods of manufacture and to uses of such nanoparticles.

A luminescent nanocomposite comprising functionalized graphene and a luminescent moiety, its fabrication, and uses are described. The luminescent moiety is anchored non-covalently to the functionalized graphene. Luminescence properties of the nanocomposite may be modulated by choosing appropriate luminescent moieties such as native lactoferrin, native lactoferrin protected gold clusters, and so forth. Mechanical properties of the nanocomposite may be modulated by adding a biopolymer such as Chitosan. The nanocomposite may be used as a luminescent ink for encoding information, or a luminescent film for tagging articles of manufacture such as electronic waste components.

A composition is provided, including one or more quantum dots and at least one organic emitter. Further, a formulation including the composition, a use of the formulation and a device comprising the composition or formulation is provided.

Provided are an organic rare-earth solid micelle, a preparation method therefor, and a method for increasing the photoelectric conversion efficiency of a solar battery. A small organic conjugated ligand is taken as a first ligand, an amphiphilic diblock polymer is taken as a second ligand, and the first ligand and the second ligand are mixed and doped with a rare-earth chloride solution, and self-assembled to form an organic rare-earth solid micelle, whereby the fluorescence emission intensity and the fluorescence efficiency of the rare-earth element are improved. Next, the prepared organic rare-earth solid micelle is spin coated on an ITO layer of a solar battery, to prepare a solar battery with the organic rare-earth solid micelle. Therefore the sunlight absorption of a cell is increased, and the photoelectric conversion efficiency is improved. The preparation process is simple, low in cost, high in photoelectric conversion efficiency, and environmentally friendly.

The composition comprises: (a) a compound of formula (I), (b) a polymeric matrix comprising a crosslinked polymer, the matrix having a viscosity value comprised from 110.sup.3 to 110.sup.12 Pa.Math.s, (c) a redox pair, and (d) a solvent, the compound of formula (I) and the redox pair being embedded in the polymeric matrix; and wherein: R.sub.1 and R.sub.2 are selected from: a (C.sub.1-C.sub.20)alkyl; (C.sub.1-C.sub.20)alkyl substituted; a 2 to 20-member heteroalkyl; a 2 to 20-member heteroalkyl substituted; (C.sub.2-C.sub.20)alkenyl; (C.sub.2-C.sub.20)alkenyl substituted; (C.sub.2-C.sub.20)alkynyl; (C.sub.2-C.sub.20)alkynyl substituted; and a known ring system; R.sub.3 to R.sub.10 are selected from hydrogen; (C.sub.1-C.sub.20)alkyl; (C.sub.1-C.sub.20)alkyl substituted; and nitro; and X is a monocharged anion.

The present invention also relates to processes for its preparation and to devices comprising it.

The multichromic composition shows a short switching time and low transmission in the most visible range, which makes it effective in blocking the whole visible radiation in smart windows.

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Described herein is a cost-effective and time-efficient method for producing photochromic contact lenses, in particular, preferably photochromic silicone hydrogel contact lenses, from a polymerizable composition comprising an unique selection and combination of main polymerizable components, a photochromic compound and a visible-light photoinitiator, based on the Lightstream Technology?. This invention also provides photochromic contact lenses or more preferably photochromic silicone hydrogel contact lenses made according to a method of the invention. A photochromic contact lens of the invention is capable of undergoing a reversible color change upon exposure to UV-irradiation or high-energy-violet light (HEVL) (with wavelengths from 380 nm to 440 nm).

The present invention relates to a composition comprising at least one light emitting moiety.

Embodiments provide a quantum dot complex including a quantum dot, a ligand which is bonded on the surface of the quantum dot and contains a hydrophilic group, and a protective layer which is bonded on the surface of the quantum dot and contains an aluminum oxide. Embodiments also provide a display device which includes the quantum dot complex.