压力调节的异常有机-无机相互作用增强MHyPbBr3的结构扭曲和第二和生成
Yuhong Mao1, Songhao Guo1, Xu Huang2
1Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, China.
Journal of the American Chemical Society
|October 20, 2023
概括
压力调节有机-无机化像MHyPbBr3增强了相互作用,增加了结构扭曲和第二和生成 (SHG) 强度. 这项研究揭示了优化光电子属性的关键相关性.
科学领域:
- 材料科学
- 固态物理
- 晶体学
背景情况:
- 有机-无机化矿由于可调节的结构,对光电子具有前景.
- 有机-无机相互作用对矿性质的影响尚不清楚.
研究的目的:
- 研究有机-无机相互作用对甲基化 (MHyPbBr3) 的结构和光学性能的影响.
- 探索压力调节作为调节这些相互作用和材料特性的一种方法.
主要方法:
- 使用压力调整持续修改MHyPbBr3中的有机-无机相互作用.
- 在不同压力下分析结构扭曲,相变和光学性能的变化.
主要成果:
- 压缩加强了Pb-N坐标键和N-H··Br键,增加了八面体扭曲.
- 在1.5GPa时,第二子 (SHG) 的强度增加了18倍.
- 在0.5GPa时,相位过渡温度从408K上升到454K.
- 在更高的压力下,非中心对称转换导致带隙显著增加 (0.44 eV).
结论:
- 有机-无机相互作用极大地影响化矿的结构扭曲和SHG特性.
- 压力调整为阴子工程和性能优化提供了可行的策略.
- 这些发现为设计基于矿的先进光电子设备提供了洞察力.
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