Increases in the Charge Separation Barrier in Organic Solar Cells Due to Delocalization

The Journal of Physical Chemistry Letters
Adam GluchowskiIvan Kassal

Abstract

Because of the low dielectric constant, charges in organic solar cells must overcome a strong Coulomb attraction in order to separate. It has been widely argued that intermolecular delocalization would assist charge separation by increasing the effective initial electron-hole separation in a charge-transfer state, thus decreasing their barrier to separation. Here we show that this is not the case: including more than a small amount of delocalization in models of organic solar cells leads to an increase in the free-energy barrier to charge separation. Therefore, if delocalization were to improve the charge separation efficiency, it would have to do so through nonequilibrium kinetic effects that are not captured by a thermodynamic treatment of the barrier height.

References

Aug 8, 2009·Physical Review Letters·Carsten DeibelVladimir Dyakonov
Jan 13, 2010·Chemical Reviews·Tracey M Clarke, James R Durrant
Oct 22, 2013·Journal of the American Chemical Society·Hiroyuki Tamura, Irene Burghardt
Jul 6, 2014·Physical Chemistry Chemical Physics : PCCP·Feng Gao, Olle Inganäs
Aug 8, 2014·Journal of the American Chemical Society·Alex J BarkerJustin M Hodgkiss
Dec 3, 2014·Physical Chemistry Chemical Physics : PCCP·Sheridan FewJenny Nelson
Oct 13, 2015·Physical Chemistry Chemical Physics : PCCP·Heinz Bässler, Anna Köhler
Jan 20, 2016·The Journal of Physical Chemistry Letters·Gabriele D'AvinoDavid Beljonne
Aug 20, 2016·Journal of the American Chemical Society·Andreas C JakowetzRichard H Friend
Oct 30, 2016·The Journal of Physical Chemistry Letters·Samantha N Hood, Ivan Kassal
Apr 25, 2017·The Journal of Physical Chemistry Letters·Stavros AthanasopoulosAnna Köhler

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Citations

Jun 17, 2021·Chemical Reviews·Meera MadhuMahesh Hariharan
Jul 8, 2021·The Journal of Physical Chemistry Letters·Waldemar KaiserAlessio Gagliardi
Oct 30, 2019·The Journal of Physical Chemistry Letters·Stavros AthanasopoulosAnna Köhler

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