电子合和局部和电荷转移激发之间的转换动力学来自多体格林函数理论
Gianluca Tirimbò1,2, Björn Baumeier1,2
1Department of Mathematics and Computer Science, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
Journal of chemical theory and computation
|May 21, 2024
概括
我们使用GW-贝特-萨尔佩特方程理论探索了局部和电荷转移激发之间的电子合. 不同的方法对小型系统的合产生了最小的影响,但在大型,无序的有机材料中显示出差异.
科学领域:
- 计算化学计算化学
- 材料科学 材料科学 材料科学
- 量子力学就是量子力学.
背景情况:
- 了解电子合对于设计有机电子材料至关重要.
- 局部激发 (LEs) 和电荷转移 (CT) 激发在电荷动态中起着关键作用.
- 在GW近似和Bethe-Salpeter方程 (GW-BSE) 中的多体格林函数理论是电子结构计算的强大工具.
研究的目的:
- 为了研究LE和CT激发之间的电子合的确定.
- 评估不同型电化方法和GW-BSE模型选择对LE-CT合器的影响.
- 为了评估大规模,无序的有机半导体形态中的LE-CT合.
主要方法:
- 多体格林函数理论使用GW近似和贝特-萨尔佩特方程 (GW-BSE).
- 适用于小分子二聚体系统和大规模低捐赠体形态学 (烯和烯).
- 对无序系统的结合GW-BSE-分子力学计算.
- 埃德米斯顿 - 鲁登伯格,一般化穆利肯 - 胡什和碎片电荷差异的比较. 形式化.
主要成果:
- 糖尿病化方法和GW-BSE模型选择对小型系统中的LE-CT合影响最小.
- 对于使用不同的糖尿病化方法的无序有机系统,观察到LE-CT合的显著差异.
- 这些差异在动力模型中影响了中间时间状态的种群,但没有影响最终的种群.
结论:
- 在复杂,无序的有机材料中,对于精确的LE-CT合计算而言,选择的糖化方法变得很重要.
- 与分子力学相结合的GW-BSE计算为研究这些系统中的电子合提供了一个强大的框架.
- 了解这些合对于预测和控制有机电子中的电荷转换动态至关重要.
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