摘要
以三辛基氧化膦(TOPO)作为溶剂,利用无水InCl3和P(Si(CH3)3)3之间的脱卤硅烷基反应合成了InP胶体量子点.其中,TOPO既作为反应溶剂又作为量子点的包覆剂和稳定剂,在反应后期加入十二胺作为表面活性剂.利用粉末X射线衍射仪及透射电子显微镜测量了量子点的结晶性、晶格结构、晶粒尺寸、表面形貌以及晶粒尺寸分布,利用光致发光(PL)光谱仪和紫外可见分光光度计分析了其光学性质.测试结果显示,量子点具有较好的结晶性及一定的尺寸分布,平均直径为2.5nm,标准偏差为7.4%,表现出明显的量子限制效应.
InP colloidal quantum dots （QDs） are prepared using the dehalosilylation reaction of InCh · 4H2O and P（Si（CH3 ）3 ）3 in trioctylphosphine oxide （TOPO）. The TOPO is used as capping groups and colloidal stabilizer,and the dodecylamine added during the later period of the reaction period is used as surfactant. Particle size,crystallinity,lattice structure, morphology ,and size distributions are measured using powder X-ray diffraction and transmission electron microscopy. The optical properties are characterized with photoluminescence and ultraviolet spectrometers. These results indicate that the average diameter of the QDs,which possess good crystallinity and size distribution,is 2. 5nm, and hence they clearly exhibit quantum confinement effect.
基金
国家自然科学基金(批准号:60576006)
教育部重点科研基金(批准号:105112)资助项目~~
关键词
InP胶体量子点
纳米晶
量子限制效应
InP
colloidal quantum dots
nanocrystal
quantum confinement effect
