Cong-cong ZHANG, Lian-dong LIU, Lei XIA, Xue LI, Xiao-kai ZHANG. Preparation of ZnSe/ZnS Core-Shell Quantum Dots Under UV Irradiation[J]. Spectroscopy and Spectral Analysis, 2020, 40(11): 3409
- Spectroscopy and Spectral Analysis
- Vol. 40, Issue 11, 3409 (2020)
Fig. 1. Reaction process pattern of ZnSe water phase method
Fig. 2. Synthesis of GSH decomposition (a) and ZnS shell synthesis (b)
Fig. 3. ZnSe quantum dots modified by TGA (a) and ZnSe quantum dots modified by GSH(b) as well as ZnSe/ZnS core-shell structure (c) and ZnSe/ZnS core-shell structure modified by GSH (d)
Fig. 4. XRD patterns of samples under TGA and GSH modification
Fig. 5. Elemental composition analysis of ZnSe QDs
Fig. 6. Photoluminescence of quantum dots at different pH (a) and ZnSe electron transition mode (b)
Fig. 7. Emission (a) and absorption (b) of ZnSe QDs at different illumination times
Fig. 8. Absorption of ZnSe ODs at different components; production of containing selenium elemental and electron microscopy images in selenium rich condition (a); Quantum dots gatheredbecause of bridging (b)
Fig. 9. The variation trend of TGA-modified ZnSe QDs with time is (a)→(b)→(c) at 4 ℃; The variation trend of TGA-modified ZnSe QDs with time is (d)→(e)→(f)→(g) atroom temperature; Absorption curves of TGA-modified QDs before and after oxidation (h)
Fig. 10. Absorption curves of GSH-modified QDs before and after oxidation
Fig. 11. Electron transition pattern of ZnSe/ZnS core-shell structure (a) and comparison of luminescence states under different modification conditions (b)
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