Formation and spectroscopic characterization of nearly mono-dispersed CdS nanocr

2020-01-21 07:43:33

The spectra CdS nanocrystals

责任者: Yanming Miao;Zhenyu Wu;Li Cao;Limin Fu;Yuping He;Sishen Xie;Bingsuo Zou 单位: Inst. of Phys., Chinese Acad. of Sci., Beijing, China 来源出处: Optical Materials(Opt. Mater. (Netherlands)),2004/06/,26(1):71-4 摘要: Using the organic solvent method, nearly mono-dispersed CdS nanocrystals were obtained in liquid paraffin. The CdS nanocrystals in tetrahedron shape capped with the hydrophobic surfactants in nanometer scale can be assembled to a close-packed monolayered structure. The CdS nanocrystals with different sizes have been prepared by changing the reaction conditions such as the concentrations of cadmium precursor and sulfur precursor, the initial ratio of Cd:S precursors and the pH value of reaction system. The UV-visible absorption and photoluminescence show the quantum confinement effect clearly. The time-resolved photoluminescence spectra have also been examined 关键词: cadmium compounds;II-VI semiconductors;nanostructured materials;optical materials;photoluminescence;time resolved spectra;ultraviolet spectra;visible spectra;nearly monodispersed Cds nanocrystals;organic solvent method;liquid paraffin;hydrophobic surfactants;close-packed monolayered structure;pH value;photoluminescence;UV-visible absorption;quantum confinement effect;time-resolved photoluminescence spectra;CdS