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Ionization Energies, Electron Affinities, and Polarization Energies of Organic Molecular Crystals: Quantitative Estimations from a Polarizable Continuum Model (PCM)–Tuned Range-Separated Density Functional Approach

机译:有机分子晶体的电离能,电子亲和力和极化能:可极化连续体模型(PCM)的调谐估计的分离距离密度函数方法

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摘要

We propose a new methodology for the first-principles description of the electronic properties relevant for charge transport in organic molecular crystals. This methodology, which is based on the combination of a non-empirical, optimally tuned range-separated hybrid functional with the polarizable continuum model, is applied to a series of eight representative molecular semiconductor crystals. We show that it provides ionization energies, electron affinities, and transport gaps in very good agreement with experimental values as well as with the results of many-body perturbation theory within the GW approximation at a fraction of the computational costs. Hence, this approach represents an easily applicable and computationally efficient tool to estimate the gas-to-crystal-phase shifts of the frontier-orbital quasiparticle energies in organic electronic materials.
机译:我们为与有机分子晶体中电荷传输有关的电子性质的第一性原理提出了一种新方法。该方法基于非经验的,优化调谐的范围分离的杂化功能与可极化连续体模型的组合,可应用于一系列八个代表性的分子半导体晶体。我们表明,它提供的电离能,电子亲和力和传输间隙与实验值以及GW近似内的多体摄动理论的结果非常吻合,而计算成本却很小。因此,该方法代表了一种易于应用且计算效率高的工具,可用来估算有机电子材料中前沿轨道准粒子能量的气相到晶体相移。

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