Fig. 1. XRD energy spectrum of original and modified sample

Fig. 2. Photo luminescence spectra of the original sample and modified quantum dots

Fig. 3. Photos of changes of quantum dots in pure water and DMSO before and after modification under different conditions (room temperature, 80 ℃)

Fig. 4. Thermal stability of the films of the original sample and the modified sample

Fig. 5. Device structure and chromaticity diagram of LEDs with modified chalcogenide quantum dots

Fig. 6. Electrochemical performance of original and modified quantum dots LED