Discovery and evaluation of a single source selenium sulfide precursor for the synthesis of alloy PbSxSe1-x nanocrystals

被引:11
|
作者
Thomson, Jordan W. [1 ]
Wang, Xiang [1 ]
Hoch, Laura [1 ]
Faulkner, Daniel [1 ]
Petrov, Srebri [1 ]
Ozin, Geoffrey A. [1 ]
机构
[1] Univ Toronto, Dept Chem, Toronto, ON M5S 3H6, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
QUANTUM DOTS; OPTICAL-PROPERTIES; PBS NANOCRYSTALS; PARTICLE-SIZE; PERFORMANCE; SOLVENTS; SCALE;
D O I
10.1039/c2jm30408b
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In this article, we evaluate the use of a novel single source SemSn precursor for the synthesis of alloy PbSxSe1-x nanocrystals using oleylamine as stabilizing ligand, reagent and solvent. The precursor is prepared by quenching a stoichiometric melt of S and Se. We found that this precursor, like the related sulfur-oleylamine solution popular for the synthesis of metal sulfide nanocrystals, is tolerant of air and moisture and allowed for the simple and fast preparation of nanocrystals at relatively low reaction temperatures. The resulting nanocrystals were shown to form a homogeneous alloy using electron microscopy, elemental mapping, and powder X-ray diffraction with Vegard analysis. The precursor reactivity was studied with Se-77 NMR and Raman spectroscopy and was shown to form H2Se and H2S in situ in an analogous fashion to sulfur-oleylamine, which liberates H2S.
引用
收藏
页码:5984 / 5989
页数:6
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