Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Even a little delocalisation produces large kinetic enhancements of
  charge-separation efficiency in organic photovoltaics   In organic photovoltaics, charges can separate efficiently despite their
Coulomb attraction being an order of magnitude greater than the available
thermal energy. Delocalisation has been suggested to explain this fact, because
it could increase the initial separation of charges in the charge-transfer (CT)
state, reducing their attraction. However, understanding the mechanism requires
a kinetic model of delocalised charge separation, which has proven difficult
because it involves tracking the correlated quantum-mechanical motion of the
electron and the hole in large simulation boxes required for disordered
materials. Here, we report the first three-dimensional simulations of
charge-separation dynamics in the presence of disorder, delocalisation, and
polaron formation, finding that even slight delocalisation, across less than
two molecules, can significantly enhance the charge-separation efficiency, even
starting with thermalised CT states. Importantly, delocalisation does not
enhance efficiency by reducing the Coulomb attraction; instead, the enhancement
is a kinetic effect produced by the increased overlap of electronic states.

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The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph