METHOD OF CREATING POROUS LUMINESCENT STRUCTURES BASED ON PHOSPHORS EMBEDDED IN PHOTONIC CRYSTAL Russian patent published in 2019 - IPC C30B33/00 C09K11/08 B82B3/00 B82Y20/00 B82Y40/00 

FIELD: nanotechnologies.

SUBSTANCE: invention relates to nanotechnology. When producing porous luminescent structures containing luminophors embedded in a photonic crystal formed in the form of porous layers on a substrate, first, a one-dimensional photonic crystal with an ordered array of porous layers is formed, which are obtained by chemical or electrochemical etching of the substrate, which is a plate from silicon, SiO₂, Si₃N₄, SiC. Then, the obtained photonic crystal is oxidised thermally or chemically to create a surface SiO₂ film. Thermal oxidation is carried out by heating from 300 to 1000 °C, and chemical - in solutions containing hydrogen peroxide. Thereafter, silanisation is carried out in solutions of alkoxysilanes to form a hydrophobic surface of the photonic crystal and phosphors are introduced therein with a width of the luminescence line which overlaps the resonance mode of the photonic crystal as to wavelength by means of successive digging of the organic solution containing a luminophore onto the surface of the photonic crystal. Luminescent substances used are semiconductor nanocrystals or organic dyes.

EFFECT: obtained porous luminescent structures have a narrow luminescence spectrum owing to reducing the probability of nonradiative recombination when interacting with the substrate surface.

6 cl, 2 dwg, 4 ex