六角化佩洛夫斯基特Cs2LiInCl6:阴离子排序,面共享的八面体剪切器和Mn2+发光
Bingqi Wang1, Pan Liu2, Alberto J Fernández-Carrión1
1MOE Key Laboratory of New Processing Technology for Nonferrous Metal and Materials, Guangxi Key Laboratory of Optic and Electronic Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology, Guilin, 541004, P. R. China.
Chemistry, an Asian journal
|May 13, 2024
概括
研究人员合成了一种新的六角矿,Cs2LiInCl6,显示出独特的12层结构. (Mn2+) 的化增强了其发光特性,使其适合PC-LED等光电应用.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 晶体学 晶体学是指结晶学.
背景情况:
- 基于的双矿化物对光电应用具有前景.
- 六角矿具有独特的结构和电子特性.
- 了解结构-属性关系是材料设计的关键.
研究的目的:
- 为了合成和表征六角矿Cs2LiInCl6.6.
- 研究Cs2LiInCl6及其Mn-doped变体的结构,光学和发光特性.
- 评估这些材料在光电子应用中的潜力,特别是PC-LED.
主要方法:
- 合成的固态反应.
- 用于结构分析的X射线衍射 (XRD).
- 固态核磁共振 (NMR) 光谱 (特别是7Li SS NMR) 用于结构确认.
- 光发光 (PL) 光谱学用于研究光学和发光性质.
- 测量光发光的量子收益率 (PLQY) 和热火.
主要成果:
- Cs2LiInCl6已成功合成,并证实采用了12层六角结构 (12R),具有有序的Li+和In3+离子.
- LiCl6八面体呈现出显著的扭曲,这是7Li SS NMR所证明的.
- 该材料具有大约4.98 eV的宽直接带隙.
- 与Cs2NaInCl6相比,Mn2+对Cs2LiInCl6的注导致红移发光 (610-622nm),PLQY高 (高达48%) 与Cs2NaInCl6相比:Mn2+.
- 最佳成分Cs2Li0.99In0.99Mn0.02Cl6显示了最高的PL强度,48%PLQY,以及良好的热稳定性 (~86%的发光保留在400K以下).
结论:
- 合成的Cs2LiInCl6呈现出独特的12R六角结构,由阴离子排序稳定.
- 2+兴奋剂显著增强了发光特性,为光学应用提供了潜力.
- 该材料在转换发光二极管 (pc-LED) 中的潜在使用方面表现出有希望的性能.
- 这些发现有助于进一步了解用于光电子应用的化物矿.
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