표제지
(국문초록)
목차
Part I. ZnSe 나노결정에 다양한 전이금속 도핑에 따른 광특성 변화와 백색 형광체 12
1. 서론 12
(1) 광발광의 종류와 원리(Types & Principles of PL) 12
(2) 광발광의 각과정의 원리(Principle of Each Processes of PL) 14
(3) 양자효율(Quantum Efficiency) 16
2. 실험 18
(1) 시약 및 시료 18
(2) 측정기기 19
(3) 실험 방법 20
3. 결과 및 고찰 22
1) ZnSe nanoparticles 합성 22
2) Mn(II) doped ZnSe nanoparticles 합성 25
3) Cu(II) doped ZnSe nanoparticles 합성 33
4) Cr(II) doped ZnSe nanoparticles 합성 37
4. 결론 40
Part II. ZnSe 나노결정에 EDTA 캡핑을 통한 물리적 특성 변화 연구 41
1. 서론 41
(1) 수용성 양자점의 합성 41
(2) EDTA(ethylenediaminetetraacetic acid) 42
2. 실험 43
(1) 시약 및 시료 43
(2) 측정기기 44
(3) 실험 방법 45
3. 결과 및 고찰 46
4. 결론 56
참고문헌 57
(Abstract) 58
Table 1. Fluorescence mechanism. 12
Table 2. Phosphorescence mechanism. 13
Table 3. Chemiluminescence example. 14
Table 4. Quantum Yield. 16
Figure 1. Photoluminescence system. 14
Figure 2. (a) UV-Vis absorption spectra of ZnSe nanocrystals, (b) PL spectra for ZnSe nanocrystals. 23
Figure 3. HR-TEM images for ZnSe nanocrystals (a,b) and EDXS(c) ; (a) scale bar 20 nm, (b) scale bar 5 nm. 24
Figure 4. (a) PL excitation spectra of ZnSe:Mn nanocrystals, (b) PL spectra for ZnSe:Mn nanocrystals. 28
Figure 5. XRD patterns of (a) ZnSe:Mn nanocrystals and (b) stilleite ZnSe JCPDS 29
Figure 6. HR-TEM images for ZnSe:Mn nanocrystals (a,b) and EDXS(c) ; (a) scale bar 20 nm, (b) scale bar 5 nm. 30
Figure 7. (a) PL spectra of ZnSe:Mn nanocrystals, (b) 365 nm lamp light scattering images of ZnSe:Mn nanocrystals(a), (c) PL spectra of ZnSe:Mn nanocrystals, (d) 365 nm lamp light scattering images of ZnSe:Mn nanocrystals(c). 31
Figure 8. CIE diagram of ZnSe:Mn nanocrystals. 32
Figure 9. (a) PL excitation spectra of ZnSe:Cu nanocrystals, (b) PL spectra for ZnSe:Cu nanocrystals. 34
Figure 10. XRD patterns of (a) ZnSe:Mn nanocrystals and (b) stilleite ZnSe JCPDS 35
Figure 11. HR-TEM images for ZnSe:Cu nanocrystals (a,b) and EDXS(c) ; (a) scale bar 20 nm, (b) scale bar 5 nm. 36
Figure 12. (a) PL excitation spectra of ZnSe:Cr nanocrystals, (b) PL spectra for ZnSe:Cr nanocrystals. 38
Figure 13. HR-TEM images for ZnSe:Cr nanocrystals (a,b) and EDXS(c) ; (a) scale bar 200 nm, (b) scale bar 5 nm. 39
Figure 14. structure of EDTA(ethylenediaminetetraacetic acid). 42
Figure 15. (a) UV-Vis absorption spectra of ZnSe/EDTA(method-1), (b) PL spectra for ZnSe/EDTA(method-1). 49
Figure 16. FT-IR spectrum of Na2EDTA and ZnSe/EDTA(method-1). 50
Figure 17. HR-TEM images for ZnSe/EDTA(method-1)(a,b) and EDXS(c) ; (a) scale bar200 nm, (b) scale bar 5 nm. 51
Figure 18. XRD patterns of (a) ZnSe/EDTA(method-1) nanocrystals and (b) Na₂SeO₄. 52
Figure 19. (a) UV-Vis absorption spectra of ZnSe/EDTA(method-2), (b) PL spectra for ZnSe/EDTA(method-2). 53
Figure 20. (a) FT-IR spectrum of ZnSe/EDTA(method-2) and Na₂EDTA, (b) ZnSe/EDTA(method-2) and HDA. 54
Figure 21. HR-TEM images for ZnSe/EDTA(a,b) and EDXS(c) ; (a) scale bar 20 nm, (b) scale bar 5 nm. 55