堆叠模式如何影响范德瓦尔斯异构结构的电荷转移动力学:来自时间域的答案 Ab Initio 研究
Atish Ghosh1, Biplab Goswami2, Sougata Pal3
1Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India.
The journal of physical chemistry letters
|August 21, 2023
概括
在二维范德瓦尔斯异构结构中改变堆叠模式可以显著延长电荷载体的寿命,这对于开发高效的光伏设备至关重要. 这种堆叠效应通过延迟电子孔重组来提高性能.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 计算化学计算化学
背景情况:
- 二维 (2D) 范德瓦尔斯异构结构具有独特的电子特性.
- 了解电荷载体动态是推进光电子设备的关键.
研究的目的:
- 研究2D SnX2支持的ZrS2,ZrSe2和ZrSSe异构结构中的电荷载体动力学.
- 确定堆叠模式对载体重组和转移的影响.
主要方法:
- 时间域密度函数理论.
- 非adiabatic分子动力学 (NAMD) 模拟.
主要成果:
- 观察到延迟的电子孔重组 (0.532.13 ns).
- 超快的电子和孔转移时间 (femtoseconds).
- 与AB堆叠相比,AA堆叠显著延长了载体寿命.
结论:
- 堆叠模式变化是增强基于二维异构的光伏设备的有效策略.
- 较弱的电子 - 声波合和较低的非合合有助于延长载体寿命.
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