Patent ID: 8138671

Claim:
A light-emitting device, comprising at least one light-emitting diode for emitting light of a first color and a luminescent material arranged on said at least one light-emitting diode to receive at least part of the light emitted by said light-emitting diode, characterized in that said light-emitting device further comprises a filter arranged to receive light emitted by said light-emitting diode and transmitted through said luminescent material and to absorb light of said first color; and said filter comprises a pigment compound distributed in a matrix of silicon and oxygen atoms, in which matrix at least a portion of said silicon atoms are directly bonded to hydrocarbon groups wherein at least part of the silicon atoms are bridged to another silicon atom via an oxygen atom forming bridged pairs and wherein at least part of the bridged pairs coordinates 3 oxygen atoms and 1 hydrocarbon atom with each of the bridged silicon atoms.