Light-emitting arrangement with organic phosphor

A light-emitting arrangement comprising a light source adapted to emit light of a first wavelength, and a wavelength converting member arranged to receive light of said first wavelength and adapted to convert at least part of the light of said first wavelength to light of a second wavelength, said wavelength converting member comprising i) a carrier polymeric material comprising a polyester comprising an aromatic moiety incorporated into the polymer backbone, and ii) at least one wavelength converting material having the following general formula I:

• in which
• G1 is a linear or branched alkyl group or oxygen-containing alkyl group CnH2n+1Om, n being an integer from 1 to 44 and m<n/2, or Y;
• each of A, B, C, J and Q independently is hydrogen, isopropyl, t-butyl, fluorine, methoxy, or unsubstituted saturated alkyl CnH2n+1, n being an integer from 1 to 16;
• each of G2, G3, G4 and G5 independently is hydrogen, fluorine, methoxy, or unsubstituted saturated alkyl group CnH2n+1, n being an integer from 1 to 16, or X;
• and each of D, E, I, L and M independently is hydrogen, fluorine, methoxy, or unsubstituted saturated alkyl group CnH2n+1, n being an integer from 1 to 16.