通过无Cs2NaInX6 (X = Cl, Br 和 I) 矿的离子变化调节发光:一项第一原则研究
Desheng Yin1, Zhenren Gao1,2, Changfu Xu1
1Hunan Provincial Key Laboratory of Thin Film Materials and Devices, School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, People's Republic of China. zrgao@hynu.edu.cn.
Nanoscale
|May 13, 2024
概括
改变Cs2NaInX6等无化矿矿的离子组成,可以显著增强发光. 混合化物结构,特别是含有的结构,表现出更好的性能和可调节的光吸收.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 计算化学计算化学
背景情况:
- 无化矿,特别是Cs2NaInCl6,由于平价禁止的过渡,其发光能力有限.
- 以前的研究集中在阴离子替代上,忽视了阴离子组成对发光的影响.
研究的目的:
- 研究阴离子组成对Cs2NaInX6矿光性能的影响.
- 探索提高无化 Perowskites 的发光的策略.
主要方法:
- 使用第一原理计算来研究Cs2NaInX6与各种离子组成.
- 评估了形成能量,八面体扭曲和过渡双极时刻 (TDM) 作为发光描述.
- 计算了吸收光谱,能量损失光谱,反射率和折射率.
主要成果:
- 混合化物结构显示出显著的八面体扭曲,但与单化物对应物相比,增强了TDM.
- Cs2NaInX4X'2-b和Cs2NaInX3X'3-b结构显示出优越的发光性能.
- 包括增强光吸收,特别是在低能区域,允许调节光吸收.
结论:
- 阴离子组成是优化Cs2NaInX6矿中发光的关键因素.
- 混合化物组成提供了一个有前途的途径,以实现卓越的发光和可调节的光学特性.
- 这些发现为设计高效的无发光化物矿石提供了一条道路.
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