Sub-kilogram-scale one-pot synthesis of highly luminescent and monodisperse core/shell quantum dots by the successive injection of precursors
Sub-kilogram-scale one-pot synthesis of highly luminescent and monodisperse core/shell quantum dots by the successive injection of precursors
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DOI：
10.1002/adfm.200600291
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发表时间：
2006-10-20
影响因子：
19
通讯作者：
Lee, Jin-Kyu
中科院分区：
文献类型：
--
作者：
Kim, Jae Il;Lee, Jin-Kyu
核/壳量子点（QD）的一锅法合成代表了常规合成技术的有吸引力的替代方案，其中首先纯化核CdSe QD，然后通过在高温下将壳前体缓慢添加到纯化的QD的溶液中来获得期望厚度的外延壳。我们已经开发了一种一锅法合成程序，包括在适当的温度下连续注入故意选择的核和壳形成试剂。亚千克数量的具有期望光学性质的高度发光和单分散核/壳QD（光致发光（PL）带的半峰全宽约为1.5 μ m）。30 nm）的纳米晶体是通过以受控的方式连续生长核和壳而产生的。这种一锅法也被扩展到形成水溶性的核/双壳层的CdSe/ ZnSe/ZnS量子点，表现出高的PL效率和稳定性。
The one-pot synthesis of core/shell quantum dots (QDs) represents an attractive alternative to conventional synthesis techniques, where the core CdSe QDs are first purified and then an epitaxial shell of the desired thickness is obtained by the slow addition of shell precursors to a solution of the purified QDs at high temperature. We have developed a one-pot synthesis procedure involving the successive injection of deliberately selected core- and shell-forming reagents at appropriate temperatures. Sub-kilogram quantities of highly luminescent and monodisperse core/shell QDs with desirable optical properties (full width at half maximum of photoluminescence (PL) band is ca. 30 nm) have been produced by the sequential growth of the core and shell in a controlled manner. This one-pot method has also been extended to form water-soluble core/double-shell CdSe/ ZnSe/ZnS QDs exhibiting high PL efficiency and stability.