【摘要】 采用水热法制备了均匀、单分散的BaF₂: Tb³⁺纳米粒子,并采用离子交换法制备了水杨酸钠敏化的BaF2∶Tb3+纳米粒子(SS-BaF₂: Tb³⁺)。系统地研究了样品的结构、形貌和光致发光性质。结果表明,监测Tb³⁺离子在547 nm的⁵D₄→⁷F₅跃迁,SS-BaF₂: Tb³⁺纳米粒子获得了从200 nm到385 nm波长范围宽的激发带;激发SS的π-π*电子跃迁吸收,由于SS到Tb3+的能量传递（"天线效应"）,SS-BaF₂: Tb³⁺纳米粒子产生了增强的Tb³⁺离子绿光发射;敏化纳米粒子中Tb³⁺离子光致发光寿命比未敏化纳米粒子中Tb3+离子寿命长。更多还原

【Abstract】 Uniform BaF₂: Tb³⁺nanoparticles have been prepared by hydrothermal synthesis,and sodium salicylate（ SS） sensitized BaF₂: Tb³⁺( SS-BaF₂: Tb³⁺) nanoparticles have been prepared by the ion exchange technique. Their structures,morphologies and photoluminescence properties were studied. A broad excitation band from 200 to 385 nm by monitoring ⁵ D₄→⁷ F₅ transition of Tb3 +at 547 nm in SS-BaF₂: Tb³⁺nanoparticles was detected. Under excitation of the π-π*electron transition absorption of salicylate,enhanced green emission of Tb³⁺ions in SS-BaF₂:Tb³⁺ nanoparticles was observed due to the energy transfer from SS to Tb³⁺ ions by "antenna effect ". The photoluminescence lifetimes of Tb³⁺ions in SS sensitized nanoparticles were found to be longer than those in un-sensitized nanoparticles.更多还原