CdS-ZnSe和CdSe-ZnS量子点的合成和Frster能量转移研究(英文)

• 作 者: 弓亚琼 詹寰 张贺楠 卫增岩 苏伟
• 机 构: 中北大学化工与环境学院,Department of Chemistry,City College of the City University of New York,Department of Ch
• 出 处: 无机化学学报
• 发表日期: 2013年02期
• 关键词: CdSe CdS-ZnSe rster 量子点 能量转移 FRET assembly donor 核-壳结构 hexane

采用分步合成法成功合成了CdS-ZnSe(Ⅰ型)和CdSe-ZnS(Ⅱ型)核-壳结构量子点。并首次构建了CdS-ZnSe/CdSe-ZnS结构F觟rster能量转移对。利用吸收光谱(UV-Vis),光致发光谱(PL),时间分辨光致发光谱(TRPL),透射电子显微镜(TEM)对比研究了不同配比的CdS-ZnSe/CdSe-ZnS结构Förster能量转移。分析结果表明:在能量转移发生时,CdS-ZnSe荧光强度显著下降,荧光寿命明显缩短,Frster能量转移确实存在于CdS-ZnSe/CdSe-ZnS量子点之间。

CdS-ZnSe (Ⅰ type) and CdSe-ZnS (Ⅱ type) core-shell quantum dots were successfully synthesized by the stepwise synthesis method. For the first time, the F 觟 rster energy transfer pair of CdS-ZnSe / CdSe-ZnS structure was constructed. The Förster energy of CdS-ZnSe / CdSe-ZnS structures with different ratios were studied by absorption spectroscopy (UV-Vis), photoluminescence spectroscopy (PL), time-resolved photoluminescence spectroscopy (TRPL) and transmission electron microscopy (TEM) Transfer. The results showed that the fluorescence intensity of CdS-ZnSe significantly decreased and the fluorescence lifetime was significantly shortened when energy transfer occurred. Frster energy transfer did exist between CdS-ZnSe / CdSe-ZnS quantum dots.