添加比斯基佩洛夫斯基特的结构转变和光发光特性
Jing Liu1, Qichuan Hu1, Hailong Yu1
1School of Electronic Engineering, Heilongjiang University, Harbin 150080, Heilongjiang, China.
Inorganic chemistry
|June 1, 2023
概括
这项研究探讨了含的Cs3Bi2Cl9晶体,揭示了多如何影响晶体结构和发光. 这项研究提供了对具有增强光发光性质的无矿的兴奋剂策略的见解.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 无机化学 无机化学
背景情况:
- 无金属化物矿对光电子应用具有前景.
- 通过兴奋剂调整Cs3Bi2Cl9 (CBC) 的结构和发光,对于提高性能至关重要.
- 在CBC中 (Mn) 兴奋剂可以改变其结构和光发光 (PL) 特性.
研究的目的:
- 合成和鉴定不同度Mn的纯CBC和Mn化CBC晶体.
- 研究胺兴奋剂对晶体结构,相变和发光机制的影响.
- 为了探索Mn-doped CBC对潜在的传感应用的温度依赖的光发光特性.
主要方法:
- 在不同的Bi/Mn比率下合成纯和Mn化Cs3Bi2Cl9晶体.
- 用于晶体结构分析的X射线衍射 (XRD).
- 密度函数理论 (DFT) 对电子带结构的计算.
- 温度依赖的稳定状态和时间分辨率的光发光谱学.
- 光发光 (PL) 生命周期温度测量.
主要成果:
- 将Cs3Bi2Cl9与Mn (Mn2+) 进行兴奋剂导致结构变化,形成Cs3Bi2Cl9-Mn (CBCM) 或Cs4MnBi2Cl12 (CMBC) 阶段.
- DFT的计算表明,胺兴奋剂产生了杂质水平,并改变了带结构,从间接到直接.
- 能量传输机制不同:CBCM使用系统间传输,而CMBC依赖于直接的Mn2+激发 (d-d过渡).
- CMBC表现出温度灵敏度,最大相对PL灵敏度为1.7%K-1.
结论:
- 兴奋剂是一种有效的策略来调整无金属化物矿的发光.
- 结构相位过渡对电子和光学性能有很大的影响.
- CMBC对温度敏感的发光率为光学温度计开辟了可能性.
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