Preparation method of silver ion-doped green fluorescence quantum dots

The invention relates to a preparation method of silver ion-doped green fluorescence quantum dots.The preparation method includes the specific steps of disposing a silver source, a zinc source, an indium source, a sulphur source, a sulfydryl ligand and an organic solvent in a reactor, magnetically stirring after protection gas is fed into the reactor, and heating to react so as to generate the Ag: Zn-In-S quantum dots; decreasing the temperature, injecting a zinc-source solution, and heating to react so as to generate Ag: Zn-In-S/ZnS quantum dots; stopping heating after the reaction is terminated, cooling, injecting an organic solvent, precipitating the Ag: Zn-In-S/ZnS quantum dots prior to centrifugal separation and vacuum drying so as to obtain solid powder, namely the silver ion-doped green fluorescence quantum dots, and dispersing the silver ion-doped green fluorescence quantum dots into the organic solvent so as to obtain a quantum dot solution.The preparation method has the advantages of mild reaction conditions and simple preparation technology.The prepared silver ion-doped green fluorescence quantum dots contain no heavy metal cadmium and are capable of emitting green fluorescence stably.