phosphine-free synthesis of zn 1-x xse / xs1-x /zns core ... · 1 phosphine-free synthesis of...
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Phosphine-Free Synthesis of Zn1-xCdxSe / ZnSe/ ZnSexS1-x /ZnS Core/Multishell Structures with Bright and Stable Blue–Green Photoluminescence
Huaibin Shen1,3, Changhua Zhou1, ShaSha Xu1, Cailan Yu2,
Hongzhe Wang1, Xia Chen3*, and Lin Song Li1*
1Key Laboratory for Special Functional Materials of the Ministry of
Education, Henan University, Kaifeng, 475004, P. R. China
2Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of
Sciences, 100080, P. R. China
3College of Life Science, Jilin University, Changchun, 130021, P. R. China
E-mail: [email protected], [email protected].
Supplementary Material (ESI) for Journal of Materials ChemistryThis journal is © The Royal Society of Chemistry 2011
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Figure S1. TEM images of a series of ~3.5 nm Zn1-xCdxSe nanocrystals, which correspond with Figure 1.
Supplementary Material (ESI) for Journal of Materials ChemistryThis journal is © The Royal Society of Chemistry 2011
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Figure S2. Powder XRD patterns of the ZnxCd1-xSe samples with different molar ratios of Zn and Cd.
30 40 50 60 70 80
5: 1
15: 1
25: 1
50: 1
100: 1
cubic ZnSe#80-0021
200: 1
Inte
nsity
(a.u
.)
2θ/(ο)
cubic CdSe#19-0191
Supplementary Material (ESI) for Journal of Materials ChemistryThis journal is © The Royal Society of Chemistry 2011
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Figure S3. Evolution of the PL-peak position (black) and QYs (green) for core-shell nanocrystals. Figure S4. A photo of purified powder Zn1-xCdxSe/ZnSe/ZnSexS1-x/ZnS core-shell nanocrystals sample (~ 10 g).
0 2 4 6 8 1020
40
60
80
0 2 4 6 8 10
475
500
525
Q
Y (%
)
Number of shell monolayer
Wav
elen
gth
(nm
)
Supplementary Material (ESI) for Journal of Materials ChemistryThis journal is © The Royal Society of Chemistry 2011
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Figure S5. The corresponding size-distribution histograms of Figure 5. Figure S6. High resolution TEM images of Figure 5.
2 4 6 80
10
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40
50
60
Diameter (nm)2 4 6 8
0
10
20
30
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50
Diameter (nm)2 4 6 8
0
10
20
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50
Diameter (nm)
4 6 8 100
10
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Diameter (nm)4 6 8 10
0
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Diameter (nm)6 8 10 12
0
10
20
30
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50
Diameter (nm)
a b c
d e f
Supplementary Material (ESI) for Journal of Materials ChemistryThis journal is © The Royal Society of Chemistry 2011
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Figure S7. EDX spectra of A) Zn0.94Cd0.06Se, B) Zn0.94Cd0.06Se/ZnSe, C) Zn0.94Cd0.06Se/ZnSe/ ZnSexS1-x, D) Zn0.94Cd0.06Se/ZnSe/ ZnSexS1-x /ZnS nanocrystals. Figure S8. The corresponding size-distribution histogram of Figure 7.
6 8 10 12 140
10
20
30
40
Diameter (nm)
Supplementary Material (ESI) for Journal of Materials ChemistryThis journal is © The Royal Society of Chemistry 2011