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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。
The ZnSe nanocomposites doped with Mn2 + were prepared for the first time at room temperature. The nanocomposites consisted of triblock copolymers of polyethylene-polypropylene-polyethylene, p-xylene and zinc The formed reverse microemulsion as a template, leads to hydrogen selenide gas, gas-liquid phase reaction to form ZnMnSe nanoparticles. The nanoparticle has size-dependent fluorescence emission properties, wherein the emission peak of ZnSe is related to the size of the nanoparticles, and the emission level of manganese does not substantially change with the size of the particles. When the reaction time is very short, particles of the product are observed to emit intense white fluorescence upon UV excitation. The observed white fluorescence should apply to any of the composite semiconductor quantum dot materials prepared by this method, regardless of the type of composite semiconductor material. This white fluorescence emission may be related to the increase of surface energy levels caused by the collapse of surface atoms. Further development of such white fluorescent materials may have important implications for future lighting materials.