作　　者： ; ;

机构地区： 深圳大学

出　　处： 《稀有金属材料与工程》 2010年第S2期157-160,共4页

摘　　要： 首次在室温条件制备了掺杂锰离子的复合半导体纳米材料硒化锌(ZnMnSe),该复合半导体纳米粒子以聚乙烯-聚丙烯-聚乙烯的三嵌段共聚物、对二甲苯和锌的水溶液形成的反相微乳液为模板,通入硒化氢的气体,气液相反应形成 ZnMnSe 纳米颗粒。该纳米颗粒具有与尺寸相关的荧光发射性能,其中的 ZnSe 发射峰和纳米粒子的尺寸相关,锰的发射能级基本不随粒子尺寸变化而迁移。当反应时间非常短时,观察到产物的粒子在紫外光激发下发出强烈的白色荧光。所观察到的白色荧光应该适用于任何用此法制备的复合半导体量子点材料,与复合半导体材料的种类无关。这种白色荧光的发射可能与表面原子的塌陷引起的表面能级的增加有关。进一步发展这类白色荧光材料可能对今后的照明材料具有重要的意义。 Compound semiconductor nanoparticles of manganese doped zinc selenide (ZnMnSe) were prepared at room temperature in a reverse micelle template. The template consisted of poly (ethylene)-poly (propylene)-poly (ethylene) (PEO-PPO-PEO) block copolymer, p-xylene, and zinc solution. Hydrogen selenide bubbled through the reverse micelle to reaction with Zn or Mn precursors. The corresponding ZnMnSe nanoparticles displayed a characteristic size-dependent fluorescence emission from ZnSe and no distinct shift of Mn emission was observed. An interesting strong white fluorescence was recorded for samples within very short reaction time. The observed white light fluorescence is expected to be valid for any quantum dots (QDs) composition using this method, irrespective of material type. This white light, unlike the commercial illumination sources of blended type, is generated from a single compound. Discussions were carried out to explain this phenomenon. It is speculated that the development of these kinds of QDs with white light fluorescence could lead to a revolution in the illumination industry in the future.

关 键 词： 量子点 白色荧光 掺杂磁性半导体 微乳液

领　　域： [一般工业技术]