Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Graphene-on-silicon near-field thermophotovoltaic cell   A graphene layer on top of a dielectric can dramatically influence ability of
the material to radiative heat transfer. This property of graphene is used to
improve the performance and reduce costs of near-field thermophotovoltaic
cells. Instead of low bandgap semiconductors it is proposed to use
graphene-on-silicon Schottky photovoltaic cells. One layer of graphene absorbs
around 90% of incoming radiation and increases the heat transfer. This is due
to excitation of plasmons in graphene, which are automatically tuned in
resonance with the emitted light in the mid infrared range. The absorbed
radiation excites electron-hole pairs in graphene, which are separated by the
surface field induced by the Schottky barrier. For a quasi-monochromatic source
the generated power is one order of magnitude larger and efficiency is on the
same level as for semiconductor photovoltaic cells.

9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
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The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th