Koninklijke Philips Corporation N.V.

Lumileds LLC

Markus Armin Seibald

Peter Josef Schmidt

Volker Weiler

Wolfgang Schnick

The invention provides a lighting unit comprising a light source, configured to generate light source light and a luminescent material, configured to convert at least part of the light source light into luminescent material light, wherein the light source comprises a light emitting diode (LED) and wherein the luminescent material comprises a phosphor comprising MAXdoped with tetravalent manganese, wherein M comprises monovalent cations, at least comprising potassium and rubidium, wherein A comprises a tetravalent cation, at least comprising silicon, wherein X comprises a monovalent anion, at least comprising fluorine, and wherein MAXhas the hexagonal phase.

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Aachen, Germany

Markus Armin Seibald