Green Synthesis of Curcuminoid Nanostructure for White Light Emission Application

Abstract

The main aim of this chapter is to produce white light using curcuminoids dye by simple and economical method “Polymethyl methacrylate integrated curcuminoid nanofibers (PICNFs).” Curcuminoids were extracted from Curcuma longa L. and used as an organic dye to produce white light through wavelength down-conversion. The extracted dye was treated by mixing the Curcuma powder with Polymethyl methacrylate PMMA to produce curcuminoid nanofibers on the glass through electrospinning. To make a curcuminoids solution, PMMA was combined with powder from Curcuma longa L. in three concentration levels (5, 10, and 15 wt%). The curcuminoids solution was separated from impurities using a centrifuge. Different amounts of curcuminoids solution (1 ml to 5 ml) were electrospun to study their properties. The resulting nanofibers are placed on the LED (365, 390, and 445 nm) as a remote phosphor. The effect of annealing on samples was also studied. The curcuminoid nanofibers produced white light with the CIE value of 0.302;0.338. The curcuminoid nanofibers formed uniform shape at PMMA concentration of 15 wt%. The diameter of curcuminoid nanofibers values was between 250 and 300 nm. After annealing, the average nanoparticle diameter was between 9 and 18 nm. Through stress testing, it was found that the annealing process of the nanofiber is effective to reduce phosphor degradation and extend its lifetime.