Aledia

Centre National De La Recherche Scientifique

Université Clermont Auvergne

Sigma Clermont

Abdelhay Aboulaich

Geneviève Chadeyron

Rachid Mahiou

Ivan-Christophe Robin

Ying-Lan Chang

Sylvia Scaringella

An emitting device comprising a first light emitter adapted to emit a first radiation, and a second light emitter adapted to emit a second radiation different from the first radiation, the first light emitter comprising a first semiconducting structure and a first radiation converter, the second light emitter comprising a second semiconducting structure and a second radiation converter, each semiconducting structure comprising a semiconducting layer adapted to emit a third radiation, each radiation converter comprising a set of particles able to convert the third radiation into the first or second radiation, the particles of the first radiation converter being attached to a surface by a bulk of photosensitive resin and the particles of the second radiation converter being attached to a surface by grafting.

Emitting devices, associated display screen and methods for fabricating an emitting device

A method of manufacturing nanoparticles of a photoluminescent material, including the successive steps of: a) forming nanometer-range particles of said photoluminescent material; b) forming a dispersion containing the particles in a non-aqueous solvent, the dispersion further containing at least one surface agent; c) placing the dispersion in an autoclave at a pressure in the range from 2 MPa to 100 MPa; and d) recovering the particles.

Method for producing photoluminescent particles

A method for producing a photo-luminescent material, including the following steps: (1) producing, according to a sol-gel method, a sol and then a gel of first precursors of a first substance from the sol; (2) crushing the gel; (3) optionally, annealing the gel in order to form first particles of the first substance of which the average size is between 1 pm and 20 um; (4) producing a colloidal dispersion of second particles of a second substance, different from the first substance or identical to the first substance, of which the average size is between 5 nm and 400 nm; (5) mixing the colloidal dispersion with the sol in step (1) before forming the gel or with the first particles after step (3); and (6) annealing the mixture obtained in step (5), resulting in an increase in the compactness of the mixture, the average size of the second particles after annealing being between 100 nm and 900 nm. A photo-luminescent material including a mixture of first particles of a first photo-luminescent substance of which the average size is between 1 pm and 20 pm and second particles of a second photo-luminescent substance, different from the first photo-luminescent substance or identical to the first photo-luminescent substance, of which the average size is between 100 nm and 900 nm.

Method for producing a photo-luminescent material

Growing community of inventors

Clermont-Ferrand, France

Abdelhay Aboulaich