Method of forming gigantic quantum dots

A method of forming gigantic quantum dots comprising:

• providing a first precursor by mixing zinc acetate (Zn(ac)2), cadmium oxide (CdO), a surfactant, and a solvent together and then performing a first heat treatment, wherein the first precursor comprises Zn-complex having the surfactant and Cd-complex having the surfactant;
• adding a second precursor containing elements S and Se and trioctylphosphine (TOP) into the first precursor to form a reaction mixture;
• and
• performing a second heat treatment on the reaction mixture and then cooling the reaction mixture to form the gigantic quantum dots in the reaction mixture, wherein each of the gigantic quantum dots comprises:
• a core constituted of CdSe;
• a shell constituted of ZnS and wrapping a surface of the core;
• and
• an alloy configured between the core and the shell, the alloy constituted of Cd, Se, Zn and S, wherein a content of the Cd and Se gradually decreases from the core to the shell, and a content of the Zn and S gradually increases from the core to the shell.