| abstract |
The invention discloses a synthesis method of manganese ion-doped orange-yellow light-emitting carbon quantum dots. The preparation method is as follows: firstly, the manganese source and the carbon source are weighed according to the molar ratio of 1:20～1:5, dissolved in the polar solvent N,N-dimethylformamide, then the nitrogen source is added, and the mixture is stirred until completely dissolved. A precursor solution is obtained; then the precursor solution is transferred to a polytetrafluoroethylene hydrothermal reaction kettle, and the temperature is 160 ° C ~ 200 ° C, and the time is 4 h ~ 12 h, and the suspension is obtained by thermal insulation carbonization; then add absolute ethanol and centrifuge , washing and drying to obtain orange-yellow luminescent manganese ion-doped carbon quantum dots. The preparation process of the invention is simple, the fluorescence quantum yield is high, the repeatability is strong, the raw materials are cheap, the doping amount of manganese ions is small, and the invention is suitable for large-scale batch production. The manganese ion-doped carbon quantum dots prepared at the same time emit orange-yellow light with a wavelength of about 590 nm under excitation light of 510-570 nm, and have broad application prospects in the preparation of orange-yellow LEDs. |