In this thesis , we studied a green emitter (C545T) dopanted SU8. C545T is an organic dye. [10-(2-benzothiazolyl)-1,1,7,7-tetramethyl-2,3,6,7-tetrahydro-1H,5H,11Hbenzo[l]-pyrano[6,7,8-ij]quinolizin-11one(C545T)] . When the sample of C545T and SU8 with thin films were exposured to UV-light. We found that the thin film between with UV exposure (L1-Red) and without UV exposure (L2-Green) will show the different chemistry properties.We can achieve proper CIE coordinates and color by adjusting .The different concentrations of C545T dopanted in SU8 thin films.The L1 and L2 were close-kint blue back-light in order to achieve a tunable emission module . If we crafted meticulously optimization , we can find a exclusive white light. This is a optic thin film attach to Color-change materials