陷设计的深紫外和近红外持久双激活:在石榴框架中通过二次离子替代来定制发光量
Annu Balhara1,2, Shilendra Kumar Sharma3, Jyoti Yadav4
1Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, Maharashtra, India.
ACS applied materials & interfaces
|January 30, 2026
概括
这项研究引入了一种新的双化石榴石,用于高效的深紫外B (UVB) 持久发光. 由于其可调节的发光和抗菌特性,该材料对灭菌和光学存储应用具有前景.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 发光的光度是非常的低.
背景情况:
- 发射深紫外B (UVB) 的持久发光材料对于光学存储,防伪,医学诊断和绝育等应用至关重要.
- 有效的UVB持久的稀缺性需要开发新材料,特别是非稀土.
- 双 (Bi) 合的陷控制发光为设计高效的UVB持久发光材料提供了一个有前途的途径.
研究的目的:
- 开发一种新的非稀土,双化,具有高效的深紫外B (UVB) 和近红外 (NIR) 持续发光 (PersL).
- 为了调查缺陷结构和发光机制,负责观察到的持续发光.
- 通过陷工程探索开发的在杀菌和光学信息存储中的潜在应用.
主要方法:
- 合成和表征的Ca3Ga2Ge3O12:二石榴石.
- 研究持久发光特性,包括UVB和NIR发射.
- 使用密度函数理论 (DFT) 计算,热发光 (TL) 和正子灭绝寿命光谱 (PALS) 来分析缺陷结构.
- 研究了异构替代和二级阴子兴奋剂 (Al3+,Sc3+,Sr2+,Mg2+,Zn2+) 对发光特性的影响.
主要成果:
- 一个Ca3Ga2Ge3O12:Bi被成功开发出来,表现出持久的UVB和NIRPersL.
- 发光归因于Bi3+和Bi2+离子和Bi对的共存在,由内在和产生的缺陷稳定.
- 体表现出优异的抗菌效率,这是由于其持久的UVB PersL.
- 通过二次阴离子兴奋剂的陷工程允许精确调节陷深度和可调节的UVB/NIR发光.
结论:
- 开发的Ca3Ga2Ge3O12:Bi是UVB持续发光应用的有希望的候选者,包括杀菌和光学信息存储.
- 了解和控制缺陷结构和陷水平是优化性能的关键.
- 这项工作为Bi-激活光体中陷控制的发光提供了宝贵的见解,为先进的材料设计铺平了道路.
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