White light emission from chiral carbonized polymer dots

A series of novel carbonized polymer dots have been synthesized and characterized via the condensation reaction between curcumin and various amino acids with the assistance of microwave. More strikingly, both CPDs prepared from curcumin and L/D-aspartic acid can emit strong white light in aqueous solution and in doped polyvinylpyrrolidone. The white light emitting diodes based on L-Asp-CPD/PVP and D-Asp-CPD/PVP exhibit the CIE coordinates of (0.36, 0.34) and (0.38, 0.32) at the drive current of 0.12 A, CRI of 84.9 and 89.7, and CCT of 4385 K and 3410 K, respectively. The stability of LED derived from D-Asp-CPD was better than that from L-Asp-CPD at operational time of 5 h and the driven current of 0.02 A.