Photostable cyano-substituted boron-dipyrromethene dye as green emitter for display and illumination applications

US12071574B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Hannah Stephanie Mangold · Ludwigshafen am Rhein, DE
• Martin Koenemann · Ludwigshafen, DE
• Maximilian Frank Halbauer · Brandis, DE
• Sorin Ivanovici · Ludwigshafen, DE

Key dates

• Filing date: Jun 18, 2019
• Grant date: Aug 27, 2024
• Expiry date: Jul 16, 2041

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/882
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A color converter may include a polymeric matrix material and at least one organic fluorescent colorant of formula I.a, I.b, and/or I.c wherein R1, R2, R3, R5, R6, R7 are H, C1-C20-alkyl or C6-C14-aryl-C1-C10-alkylene; R4a, R4b are fluorine, chlorine, cyano or OR10, R8a, R8b are C1-C20-alkyl; R8c is C1-C20-alkyl, C6-C10-aryl or C6-C10-aryl-C1-C10-alkylene, wherein the aryl moieties being optionally substituted by k substituents R9; k is 1, 2, 3, 4, 5 or 6; R9 is C1-C10-alkyl, C1-C10-alkoxy, CN, halogen, phenyl or phenoxy; and R10 is C1-C10-alkyl or hydroxy-C1-C10-alkyl. Backlight units for liquid crystal displays; liquid crystal display devices, and a self-emissive display devices may include this color converter and such colorant.