Signify Holding B.v.

Brankica Jovanovic

Martinus Petrus Joseph Peeters

Rene Theodorus Wegh

René Theodorus Wegh

Rémy Cyrille Broersma

Rene Jan Hendriks

René Jan Hendriks

The invention provides alighting device () comprising a solid state light source () configured to generate light source light () and a converter element () configured to convert at least part of the light source light () into converter element light (), wherein the converter element () comprises a polymeric host matrix element () hosting a particulate first luminescent material () of the type MAXdoped with tetravalent manganese, wherein M comprises an alkaline cation, wherein A comprises a tetravalent cation, and wherein X comprises a monovalent anion, at least comprising fluorine (F), wherein the particulate first luminescent material () is available in the polymeric host matrix element () with an average weight percentage x averaged over the polymeric host matrix element (), wherein the polymeric host matrix element () has a first outer face (), wherein an outer layer volume defined by at least part of the first outer face () and a first distance (d) from said first outer face () hosts the particulate first luminescent material () with a first local weight percentage y averaged over the outer layer volume with a ratio of the first local weight percentage y over the averaged weight percentage x of y/x&#x2264;0.1, and wherein the first distance (d) is at least 10 &#x3bc;m.

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Eindhoven, Netherlands

Brankica Jovanovic