| abstract |
The present invention comprises (a) a polyethylene terephthalate matrix material; And (b) at least one organic fluorescent dye selected from compounds of formulas (Ia), (Ib), (Ic) or mixtures thereof. Here, EWG1 and EWG2 are CN, CH(O), C(O)R 13 , OC(O)R 13 , COOR 14 , CH(COOR 14 ) 2 , SO 2 R 14 , C(O)NR 15 R 16 , SO 2 NR 15 R 16 or C 1 -C 20 -fluoroalkyl; R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7a , R 7b , R 7c , R 13 , R 14 , R 15 and R 16 are as defined in the claims and detailed description. The invention also relates to a backlight unit, a liquid crystal display module, and a light emitting device comprising such a color converter. The invention also relates to a novel compound of formula (lb) wherein EWG1 = EWG2 = CN. |