Microwave Synthetic Route for Highly Emissive TOP/TOP-S Passivated CdS Quantum Dots
Microwave Synthetic Route for Highly Emissive TOP/TOP-S Passivated CdS Quantum Dots
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DOI：
10.1021/cm900624z
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发表时间：
2009-08-11
影响因子：
8.6
通讯作者：
Strouse, Geoffrey F.
中科院分区：
文献类型：
--
作者：
Washington, Aaron L., II;Strouse, Geoffrey F.
通过选择性微波吸收，我们证明了TOPS作为高效硫供体的激活能力，使TOP/TOPS钝化的高发射（PLQY = 33%）、锌闪石CdS量子点（QDs）在4-6 nm尺寸范围内（尺寸分散度为5%）快速（18 m）生长。即使对于最大的CdS样品，CdS量子点也表现出明显的吸收特性和带状光致发光。十六胺的加入通过限制Cd单体活性和降低总体PLQY来限制生长速度。利用微波化学形成量子点，可以实现高度可重复的合成方案，完全适用于工业应用。
Through selective microwave absorption, we demonstrate the ability to activate TOPS its an efficient Sulfur donor, allowing the rapid (18 m) growth of highly emissive (PLQY = 33%), Zn blende CdS quantum dots (QDs) passivated by TOP/TOPS in the 4-6 nm size regime (5% size dispersity). The CdS QDs exhibit sharp absorption features and bandedge photoluminescence even for the largest CdS sample. Addition of hexadecylamine restricts the growth rate by limiting the Cd monomer activity and lowers overall PLQY. The use of MW chemistry for QD formation allows a highly reproducible synthetic protocol that is fully adaptable to industrial applications.