为获得Bi2ZnB2O7: Y3+/Dy3+新型荧光粉材料的最强黄光发光强度, 运用均匀设计和二次通用旋转组合设计相结合法对Y3+/Dy3+最佳离子掺杂浓度进行优化研究, 得到Y3+和Dy3+离子的最佳掺杂浓度分别为4.498 mol%和6.001 mol%. 采用高温固相法合成最优样品, 对样品结构进行表征, 测定其激发光谱和发射光谱对Dy3+离子在Bi2ZnB2O7 基质中的发光性质,研究发现: 样品在452 nm激发下, 发射光谱主要由(460~500 nm) 蓝光发射、(550~610 nm) 黄光发射、(650~700 nm) 红光发射组成, 分别对应于Dy3+的4F9/2→ 6H15/2、4F9/2→6H13/2 及4F9/2→6H11/2 跃迁; Bi2ZnB2O7 基质为Dy3+提供了非中心对称的晶格格位; 最优样品中Dy3+的荧光寿命为0.427 ms,与相同浓度Dy3+单掺杂样品相比较可知引入Y3+在一定程度上提高了发光强度.

In order to obtain the strongest yellow luminescence intensity of the novel Bi2ZnB2O7: Y3+/Dy3+ phosphor, uniform design and quadratic general rotary unitized design were combined to optimize Y3+/ Dy3+ ions doping concentrations, the result shows that the optimum doping concentrations of Y3+/ Dy3+ were 4.498 mol% and 6.001 mol%, respectively. High temperature solid state method was applied to synthesize the optimal sample, and the crystal structure and luminescent properties were investigated. The emission spectra of the samples under 452 nm excitation were observed, where the blue emission band was at around 460~500 nm, the yellow emission was at around 550~610 nm and the weaker peak of the red emission is at around 650~700 nm. They were corresponding to the emissions from the 4F9/2 excited state to the 6H15/2, 6H13/2 and 6H11/2 ground states, respectively. The result indicates that the Dy3+ ions were located at a non-centrosymmetric site in the host lattice. Besides, the luminescence decay curve illustrated that the fluorescence lifetime of Dy3+ was 0.427 ms. It was found from the comparison between the optimized and the single-doped samples with the same Dy3+ concentration that Y3+-introduction could improve the emission intensity of the studied phosphor in a certain degree.