Sr3B2O6：Eu3+,Li+荧光粉的合成与发光性能

采用高温固相法合成Sr₃B₂O₆：Eu³⁺，Li⁺红色荧光粉，考察了激活剂Eu³⁺和电荷补偿剂Li⁺浓度对Sr₃B₂O₆：Eu³⁺，Li⁺荧光粉发光性能的影响。结果表明：适量掺杂Eu³⁺、Li⁺离子并不改变Sr₃B₂O₆的结构。当Eu³⁺掺杂量为4%、Li⁺的掺杂量为8%时，在900 ℃下灼烧2 h可以得到发光性能最佳的Sr_2.9B₂O₆：0.04Eu³⁺，0.08Li⁺红色荧光粉。以394 nm的近紫外光激发时，Sr₃B₂O₆：Eu³⁺，Li⁺荧光粉发射出红光，对应于Eu³⁺的4f-4f 跃迁，其中以614 nm附近的⁵D₀→⁷F₂跃迁发光最强，是一种有潜力用于白光LED的红色荧光粉。

Synthesis and Luminescent Properties of Sr3B2O6：Eu3+,Li+ Phosphor

The red phosphor Sr₃B₂O₆:Eu³⁺,Li⁺ was prepared by high temperature solid-state method. The effects of the concentration of activating agent Eu³⁺and sensitizing agent Li⁺ on luminescent properties of Sr₃B₂O₆:Eu³⁺,Li⁺ were investigated. The results show that there is not obvious structure transformation of Sr₃B₂O₆ after appropriate amounts of Eu³⁺ and Li⁺ doping. The optimal doping content of Eu³⁺ and Li⁺ are 4% and 8%, respectively. The optimal temperature is 900 ℃ for 2 h. The phosphor Sr₃B₂O₆:Eu³⁺,Li⁺ can be excited by 394 nm near-UV light and emits red light corresponding to the 4f-4f transition of Eu³⁺. Its strongest emission peak is attributed to the ⁵D₀→ ⁷F₂ transition of Eu³⁺ at about 614 nm. The phosphor could be a promising red phosphor for white LED.