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首页> 外文期刊>Journal of Crystal Growth >Investigation of the role of cadmium sulfide in the surface passivation of lead sulfide quantum dots
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Investigation of the role of cadmium sulfide in the surface passivation of lead sulfide quantum dots

机译:硫化镉在硫化铅量子点表面钝化中的作用研究

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Surface passivation of PbS nanocrystals (NC), resulting in strong photoluminescence, can be achieved by the introduction of US precursors. The role of CdS in the surface passivation of PbS NCs is uncertain, as the crystalline structure of CdS and PbS are different, which should impede effective epitaxial overgrowth. Absorption spectroscopy is used to show that the CdS precursors strongly interact with the PbS NC surface. Electron microscopy reveals that the introduction of US precursors results in an increased particle size, consistent with overcoating. However, we also find the process to be highly non-uniform. Nevertheless, evidence for epitaxial growth is found, suggesting that effective surface passivation may be possible. (C) 2004 Elsevier B.V. All rights reserved.
机译:PbS纳米晶体(NC)的表面钝化可导致强光致发光,可通过引入美国前体来实现。 CdS在PbS NCs的表面钝化中的作用尚不确定,因为CdS和PbS的晶体结构不同,这将阻碍有效的外延生长。吸收光谱用于显示CdS前体与PbS NC表面强烈相互作用。电子显微镜显示,引入美国前体会导致粒径增加,这与外涂层一致。但是,我们也发现该过程非常不统一。然而,发现外延生长的证据表明有效的表面钝化是可能的。 (C)2004 Elsevier B.V.保留所有权利。

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