使用 DFT/QTP 函数和 EOM-CC 函数对潜在光伏分子的电离电位和电子亲和度进行基准测试
Hyunsik Kim1, Ajith Perera1, Rodrigo A Mendes1
1Quantum Theory Project, University of Florida, Gainesville, Florida 32611, USA.
The Journal of chemical physics
|November 4, 2025
概括
对有机光伏材料来说,准确预测电离潜力 (IP) 和电子亲和力 (EA) 是非常重要的. 结合G0W0校正的QTP函数,以计算成本的一小部分提供合集群准确性.
科学领域:
- 计算化学是一种计算化学.
- 材料科学是一种材料科学.
- 有机电子学有机电子学
背景情况:
- 准确预测电离潜力 (IP) 和电子亲和力 (EA) 是设计有机光伏 (OPV) 材料至关重要的.
- 现有的计算方法经常面临准确性和计算成本之间的权衡.
研究的目的:
- 评估各种Kohn-Sham密度函数理论 (DFT) 函数的性能,包括QTP家族,用于预测IP和EA.
- 评估G0W0校正和结自然轨道 (FNO) 截断对计算效率和准确性的影响.
- 将基于DFT的方法与IP和EA计算的合集群 (CC) 理论进行比较.
主要方法:
- 结合集群 (CC) 理论,特别是电离潜力 (IP) /电子亲和力 (EA) -运动方程 (EOM) /结合集群单双 (CCSD) 形式.
- 科恩-沙姆密度函数理论 (DFT) 使用QTP家族和一系列其他交换相关函数.
- 对DFT结果进行一次性G0W0校正.
- 标准和量身定制的冷自然轨道 (FNO) 截断以降低CC计算成本.
主要成果:
- 局部和半局部DFT函数在IP/EA预测中显示出重大错误.
- 全球混合动力和范围分离的混合动力比更简单的DFT函数提供了更好的准确性.
- QTP 功能表现显示性能与其他测试的功能表相匹配或超过.
- 应用于DFT起点的G0W0校正使轨道能量与CC结果密切一致.
- 定制的FNO截断保持了CC准确性,同时大大减少了计算资源.
- 在不到一天的时间内,QTP00和G0W0@QTP00工作流实现了接近CC的质量预测,与完整的EA-EOM/CCSD相比,大大减少了计算时间.
结论:
- QTP函数,特别是当与G0W0校正相结合时,为预测IP和EA提供了一个高度准确和计算高效的方法.
- 定制的FNO截断提供了一种可行的策略,可以在不牺牲准确性的情况下加速CC计算.
- 这些进展可以显著指导下一代有机光伏材料的开发.
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