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使用Kohn-Sham轨道能量有效预测延迟光发射器中的单元-三元差距

Ye Li¹, Chen Li¹

¹Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.

The journal of physical chemistry letters

|December 26, 2025

概括

对有机发光二极管来说,预测单三间隙 (STG) 是非常重要的. 准粒子能量密度功能理论 (QE-DFT) 提供了一种高度准确和高效的方法,优于设计新发射器的传统方法.

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:

准确预测单元三元差距 (STGs) 对于开发高效的反转单元三元 (INVEST) 和热激活延迟光 (TADF) 发射器至关重要.
下一代有机发光二极管 (OLED) 依赖于这些先进的发射器设计.

研究的目的:

评估准粒子能量密度函数理论 (QE-DFT) 作为预测STG的准确和有效方法.
将QE-DFT性能与INVEST和TADF分子的时间依赖密度函数理论 (TDDFT) 进行比较.

主要方法:

利用QE-DFT直接计算来自Kohn-Sham轨道能量差异的STG.
在 QE-DFT 框架内使用了 B3LYP 函数.
在233个INVEST和TADF分子的各种数据集上测试了该方法.

主要成果:

对于STG预测,QE-DFT实现了0.06 eV的低平均绝对误差.
在准确度上,QA-DFT显著超过了传统功能近似的TDDFT.
证明了 QE-DFT 的计算效率,使其适用于高通量选.

结论:

QE-DFT为预测STG提供了一个高效和准确的替代方案.
这种方法在加速新型INVEST和TADF发射器的发现和设计方面具有很大的前景.
QE-DFT是推进OLED技术的一个有价值的工具.

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