| 标题 |
 Photoluminescence, radioluminescence and optically stimulated luminescence in nanoparticle and bulk KMgF3(Eu) 纳米颗粒和大块KMgF3(Eu)的光致发光、放射发光和光受激发光
相关领域
放射发光
光致发光
纳米颗粒
发光
材料科学
辐照
价（化学）
微晶
光释光
分析化学（期刊）
退火（玻璃）
晶体缺陷
光化学
化学
光电子学
纳米技术
结晶学
光学
闪烁体
复合材料
色谱法
有机化学
核物理学
物理
冶金
探测器
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| 网址 | |
| DOI |
10.1016/j.jlumin.2018.08.056
doi
|
| 其它 | Photoluminescence (PL) and radioluminescence (RL) were observed in both bulk polycrystalline and nanoparticle KMgF3(Eu). Eu2+ and Eu3+ emissions were detected in the PL of both samples. The nanoparticles had more Eu3+, more distorted Eu3+ sites, and a higher PL quantum efficiency when compared to the bulk compound. X-ray-induced valence conversion of Eu2+ to Eu3+ was observed in the bulk, while Eu3+ to Eu2+ was found for nanoparticles. The valence conversion was reversed for the bulk compound by UV bleaching (254 nm) and partially reversed in the nanoparticles by 330 nm stimulation. F2 and F3-centre PL was observed in the bulk after X-ray irradiation but was absent in the nanoparticles. PL from other point defects occurred in both samples that is likely to be oxygen related. The PL from one of these defects in the nanoparticles |
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