METHOD OF DEPOSITING EMISSION LAYER Russian patent published in 2015 - IPC C23C18/02 H01L51/56 H01L33/40 H01L31/216 B82Y30/00 

FIELD: chemistry.

SUBSTANCE: invention relates to methods of producing emission layers, particularly for organic light-emitting diodes. The method of depositing an emission layer of an organic light-emitting diode on a glass or polymer substrate coated with an anode layer includes preparing a solution containing a phosphor-containing compound and a conducting material and depositing a thin film of the obtained solution on said substrate. Said film is subjected to heat treatment at temperature higher than 100°C but lower than the stability temperature of the emission layer, wherein the phosphor-containing compound used is a soluble different-ligand coordination compound which, during heat treatment, decomposes into a phosphor and a neutral ligand, which is completely removable from the thin film, wherein heat treatment of said film is carried out at a temperature higher than the ligand removal temperature. Said method enables to obtain an emission layer of an organic light-emitting diode having an anode layer, an emission layer and a cathode layer. Special cases of the invention employ a soluble different-ligand coordination compound in the form of a terbium phenoxybenzoate and acetylacetone imine complex, or a terbium phenoxybenzoate and monoglyme complex or a europium naphthonoate and monoglyme complex. When making said diode, the anode layer is additionally coated with a layer of a hole-conducting and/or electron-conducting material, and an electron-conducting and/or hole-conducting layer is deposited on top of the emission layer. The hole-conducting layer used is 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline or 3-(4-biphenyl)-4-phenyl-5-tert-butyl-phenyl-1,2,4-triazole.

EFFECT: improving characteristics of the emission layer and obtaining emission layers based on insoluble and nonvolatile compounds.

6 cl, 1 tbl, 6 ex