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Semiclassical model for calculating exciton and polaron pair energetics at interfaces

机译:用于计算exciton和PolarOn对界面的精力子的半导体模型

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Exciton and polaron pair dissociation is a key functional aspect of photovoltaic devices. To improve upon the current state of interfacial transport models, we augment the existing classical models of dielectric interfaces by incorporating results from ab initio calculations, allowing us to calculate exciton and polaron binding energies more accurately. We demonstrate the predictive capabilities of this new model using two interfaces: (ⅰ) the boron subphthalocyanine chloride (SubPc) and C_(60) interface, which is an archetype for many organic photovoltaic devices; and (ⅱ) pentacene and silicon (100), which represents a hybrid between organic and inorganic semiconductors. Our calculations predict that the insertion of molecular dipoles at interfaces can be used for improving polaron pair dissociation and that sharp transitions in dielectric permittivity can have a stronger effect on the polaron pair dissociation than even the electron-hole Coulomb interaction.
机译:激子和PolarOn对解离是光伏器件的关键功能方面。为了提高界面传输模型的当前状态,我们通过将现有的介质界面的经典模型增强结合到AB Initio计算的结果,允许我们更准确地计算Exciton和PolarOn结合能量。我们使用两个界面展示了这种新模型的预测能力:(Ⅰ)硼苯酞菁氯化物(Subpc)和C_(60)界面,这是许多有机光伏器件的原型; (Ⅱ)五苯和硅(100),其代表有机和无机半导体之间的杂交。我们的计算预测,在接口处插入分子偶极子可以用于改善极化子对解离,并且介电常介电常数的急剧转变可以对甚至电子空穴库仑相互作用具有更强的效果。

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