以油胺-硒化氢复合物为前体的脂溶性量子点的制备

报道了一种以油胺-硒化氢复合物为前体的脂溶性CdSe量子点的制备方法. 将新制备的H2Se气体通入到油胺中, 得到油胺-硒化氢复合物, 以此复合物作为前体, 采用溶剂热合成法制备了CdSe量子点, 并采用荧光光谱、电镜以及X射线衍射对其进行了表征. 结果表明, CdSe量子点为立方晶型, 荧光半峰宽较窄(25~40 nm), 荧光量子产率可达23%, 并且荧光发射光谱从480到610 nm连续可调. 该方法无须使用三烷基膦, 是一种价廉环保的量子点制备方法.

Preparation of Hydrophobic Quantum Dots Using Oleylamine-hydrogen Selenide Complex as Precursor

A novel route was developed to synthesize hydrophobic quantum dots(QDs) using oleylamine-hydrogen selenide complex as the precursor. Fresh H2Se gas was introduced into oleylamine to form oleylamine-hydrogen selenide complex, and the complex was used as the precursor to prepare QDs by hot-injection solvothermal synthesis. The obtained QDs were characterized by photoluminescence spectroscopy, transmission electron microscopy and X-ray diffraction. The results show that the proposed method led to the formation of cubic CdSe QDs with narrow fluorescence full-width at half-maximum(25—40 nm), high photoluminescence quantum yield(up to 23%), and a broad emission spectra tunable from 480—610 nm. This is a low cost and environmentally benign technique for QDs preparation due to the absence of trialkylphosphine.