Empirical evidence for identical band gaps in substituted C60 and C70 based fullerenes
Empirical evidence for identical band gaps in substituted C60 and C70 based fullerenes
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DOI：
10.1063/1.4863438
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发表时间：
2014-01-27
影响因子：
4
通讯作者：
Tanaka, Hideyuki
中科院分区：
文献类型：
--
作者：
Andersson, L. Mattias;Tanaka, Hideyuki
光学吸收率数据，以及太阳能电池开路电压和电离电位之间的强相关性的广泛的不同取代的富勒烯受体，提出了相同的，或至少是非常相似的，带隙中的所有取代的C-60和C-70为基础的富勒烯的经验证据。本研究中取代基的数量和种类都有足够的变化，以体现普遍性。虽然富勒烯的带隙对于所有不同的取代保持相同，但它们的电离势在超过0.4 eV的范围内变化很大。并对利用这些结果与光电子技术测定富勒烯相对能级的优缺点进行了讨论。例如，在一个实施例中，还讨论了与更直接的电化学方法相比的有机太阳能电池应用。(C)2014 AIP Publishing LLC.
Optical absorptance data, and a strong correlation between solar cell open circuit voltages and the ionization potentials of a wide range of differently substituted fullerene acceptors, are presented as empirical evidence for identical, or at least very similar, band gaps in all substituted C-60 and C-70 based fullerenes. Both the number and kind of substituents in this study are sufficiently varied to imply generality. While the band gaps of the fullerenes remain the same for all the different substitutions, their ionization potentials vary greatly in a span of more than 0.4 eV. The merits and drawbacks of using these results together with photoelectron based techniques to determine relative fullerene energy levels for, e. g., organic solar cell applications compared to more direct electrochemical methods are also discussed. (C) 2014 AIP Publishing LLC.