Structural investigations into colour-tuneable fluorescent InZnP-based quantum dots from zinc carboxylate and aminophosphine precursors.
Structural investigations into colour-tuneable fluorescent InZnP-based quantum dots from zinc carboxylate and aminophosphine precursors.
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对来自羧酸锌和氨基膦前体的可调色荧光 InZnP 基量子点的结构研究。
DOI：
10.1039/d2nr02803d
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发表时间：
2023
期刊：
影响因子：
6.7
通讯作者：
Burkitt-Gray M
中科院分区：
文献类型：
--
作者：
Burkitt-Gray M
基于荧光 InP 的量子点已成为显示技术、生物成像和光电应用的有价值的纳米材料。锌的加入可以增强它们的发射和结构性能，并减少与 ZnS 或 CdS 壳的界面缺陷。然而，锌的亚颗粒分布以及该元素所起的作用通常仍不清楚，并且先前已证明使用氨基膦前体合成锌合金 InP 基纳米颗粒具有挑战性。在本报告中，我们描述了使用羧酸锌合成 InZnP 合金，从无壳核心材料实现颜色可调的荧光，然后使用二乙基二硫代氨基甲酸酯前体进行一锅 ZnS 或 CdS 沉积。结构分析表明，这里合成的“核/壳”颗粒更准确地描述为均质延伸合金，其组成壳元素扩散到整个核，包括全深度的锌夹杂物。
Fluorescent InP-based quantum dots have emerged as valuable nanomaterials for display technologies, biological imaging, and optoelectronic applications. The inclusion of zinc can enhance both their emissive and structural properties and reduce interfacial defects with ZnS or CdS shells. However, the sub-particle distribution of zinc and the role this element plays often remains unclear, and it has previously proved challenging to synthesise Zn-alloyed InP-based nanoparticles using aminophosphine precursors. In this report, we describe the synthesis of alloyed InZnP using zinc carboxylates, achieving colour-tuneable fluorescence from the unshelled core materials, followed by a one-pot ZnS or CdS deposition using diethyldithiocarbamate precursors. Structural analysis revealed that the “core/shell” particles synthesised here were more accurately described as homogeneous extended alloys with the constituent shell elements diffusing through the entire core, including full-depth inclusion of zinc.