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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Low-Energy Inverse Photoemission Study on the Electron Affinities of Fullerene Derivatives for Organic Photovoltaic Cells
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Low-Energy Inverse Photoemission Study on the Electron Affinities of Fullerene Derivatives for Organic Photovoltaic Cells

机译：低能逆光发射研究富勒烯衍生物对有机光伏电池的电子亲和力

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摘要

The lowest unoccupied molecular orbital (LUMO) levels of six fullerene derivatives frequently used for organic photovoltaic cells are examined in the solid state. We employed a new experimental technique, low-energy inverse photoemission spectroscopy (LEIPS), which allows us to determine the electron affinities of solid samples within the uncertainties of 0.1 eV. Using the precisely determined electron affinities, the energy difference between the ionization energy of donor and the electron affinity of acceptor is compared with the open circuit voltage for various polymer/fullerene combinations taken from the literature. The result suggests that the well-known relation between the energy difference and the open circuit voltage should be reconsidered.
机译：固态检测了六种常用于有机光伏电池的富勒烯衍生物的最低未占据分子轨道（LUMO）水平。我们采用了一种新的实验技术，即低能逆光电子发射光谱法（LEIPS），它使我们能够在0.1 eV的不确定度内确定固体样品的电子亲和力。使用精确确定的电子亲和力，将供体电离能与受体电子亲和力之间的能量差与从文献中获得的各种聚合物/富勒烯组合的开路电压进行比较。结果表明，应重新考虑能量差与开路电压之间的众所周知的关系。

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