Luminescence and Crystallographic Sites of Eu2+ in KNaCa2 (PO4)2
Source abstract
Abstract
采用高温固相法制备了KNaCa 2 (PO 4 ) 2 :Eu 2+ 蓝色荧光粉, 并研究了材料的发光特性. 在400 nm近紫外光激发下, 材料呈非对称的单峰发射, 主峰位于470 nm. 监测470 nm发射峰, 对应的激发光谱覆盖200~450 nm, 主峰位于400 nm, 说明材料能够很好的吸收紫外-近紫外光, 发射蓝色光. 利用van Uitert公式计算了Eu 2+ 取代KNaCa 2 (PO 4 ) 2 中Ca 2+ 时所占晶体学格位, 得出461和502 nm发射分别归属于八配位和六配位的Eu 2+ 发射. 研究了Eu 2+ 掺杂浓度对KNaCa 2 (PO 4 ) 2 :Eu 2+ 材料发射强度的影响, 结果显示Eu 2+ 的最佳掺杂浓度为1mol%, 利用Dexter理论得出其浓度猝灭机理为电偶极-电偶极相互作用.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Radiation Detection and Scintillator Technologies · Solid-state spectroscopy and crystallography
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (12)
Show source-provided references
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