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全原子反应的蒙特卡洛分子动力学用于有机半导体中的分子兴奋剂

Vishnu Raghuraman¹, Archana Verma², Nicholas E Jackson^1,3

¹Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States.

Journal of chemical theory and computation

|October 8, 2025

概括

一种新的反应式蒙特卡罗分子动力学方法准确量化了有机半导体 (OSC) 中的分子兴奋剂效率. 这种计算方法解释了极子效应和电荷转移,推进了材料科学模拟.

科学领域:

计算材料科学科学计算材料科学
有机电子有机电子
化学物理化学物理

背景情况:

在有机半导体 (OSC) 中模拟分子兴奋剂是复杂的,因为竞争的长度和时间尺度.
准确预测兴奋剂效率对于设计高性能OSC设备至关重要.

研究的目的:

开发一种可靠的计算方法,以量化确定OSC中的分子兴奋剂效率.
将极子效应和电荷转移等关键物理现象纳入分子动力学模拟中.

主要方法:

开发了一种全原子反应性蒙特卡洛分子动力学 (RMCMD) 方法.
该方法使用Metropolis标准用于兴奋剂反应,通过密度函数理论 (DFT) 计算进行参数化.
极子效应和电荷转移状态被明确纳入模型的几何重组和复杂.

主要成果:

通过RMCMD方法,成功计算了聚3-基烯系统的兴奋剂效率和辐射分布函数.
模拟准确地捕获了几何重组,包括由于极子效应导致环间二面体的平整.
开发的方法被实施为LAMMPS修复,并公开提供.

结论:

RMCMD方法为研究OSC中的分子兴奋剂提供了一种定量精确和计算可行的方法.
这项工作可以更精确地模拟被杂的OSC,促进先进有机电子材料的设计.
公开可用的代码将使有机电子的更广泛的研究社区受益.

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