Synthesis of Highly Luminescent CdTe0.5S0.5/CdxZn1−xS Core/Shell Quantum Dots
Synthesis of Highly Luminescent CdTe0.5S0.5/CdxZn1−xS Core/Shell Quantum Dots
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高发光 CdTe0.5S0.5/CdxZn1−xS 核/壳量子点的合成
DOI：
10.1166/asem.2013.1229
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
N. Mursae
中科院分区：
文献类型：
--
作者：
S. Wang;C. L. Li;N. Mursae
采用一种环境友好的有机合成方法制备了高发光的CdTe 0.5S 0.5/Cd xZn 1-x S核壳结构量子点（QDs）。以CdO、十八烷基膦酸（ODPA）、三辛基膦（TOP）、Te、S和三辛胺（TOA）为原料，在280-300 °C合成了光致发光（PL）波长在595 - 607 nm之间的CdTe 0.5S 0.5核.壳制剂分为两类。以Cd（Ac）2 ·2 H2O、Zn（Ac）2、TOP和S为原料，在300 °C下进行了油酸（OA）配体的CdxZn 1-xS壳层生长。CdTe 0.5S 0.5/Cd x Zn 1-x S核壳结构量子点的PL峰较CdTe 0.5S 0.5核的初始PL峰明显红移（约700 nm），PL量子效率（QE）显著提高（约48%）。以十六胺（HDA）代替油酸（OA）为封端剂，十八烯（ODE）为溶剂，在220 °C下制备了CdTe 0.5S 0.5/CdxZn 1-xS核壳量子点，其荧光峰波长在615 ~ 637 nm之间。
Highly luminescent CdTe0.5S0.5/Cd x Zn1–x S core–shell quantum dots (QDs) have been prepared by a facile environmentally friendly organic route. The CdTe0.5S0.5 cores with the photoluminescence (PL) wavelengths between 595 and 607 nm were synthesized at 280–300 °C by using CdO, octadecylphosphonic acid (ODPA), trioctylphosphine (TOP), Te, S, and trioctylamine (TOA). Shell preparations are of two kinds. The Cd x Zn1–x S shell growth with oleic acid (OA) ligand was carried out by using Cd(Ac)2 · 2H2O, Zn(Ac)2, TOP and S at 300 °C. The CdTe0.5S0.5/Cd x Zn1–x S core–shell QDs exhibited a significant red shift of PL peaks (up to 700 nm) from the initial PL of CdTe0.5S0.5 cores with much improved PL quantum efficiency (QE) (up to 48%). The CdTe0.5S0.5/Cd x Zn1–x S core–shell QDs with the PL peak wavelength between 615 and 637 nm were obtained by using hexadecylamine (HDA) instead of OA as a capping agent and octadecene (ODE) as solvent at 220 °C.