Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High Responsivity and Quantum Efficiency of Graphene / Silicon
  Photodiodes Achieved by Interdigitating Schottky and Gated Regions   Graphene / silicon (G/Si) heterostructures have been studied extensively in
the past years for applications such as photodiodes, photodetectors and solar
cells, with a growing focus on efficiency and performance. Here, a specific
contact pattern scheme with interdigitated Schottky and
graphene/insulator/silicon (GIS) structures is explored to experimentally
demonstrate highly sensitive G/Si photodiodes. With the proposed design, an
external quantum efficiency (EQE) of > 80 % is achieved for wavelengths ranging
from 380 to 930 nm. A maximum EQE of 98% is observed at 850 nm, where the
responsivity peaks to 635 mA/W, surpassing conventional Si p-n photodiodes.
This efficiency is attributed to the highly effective collection of charge
carriers photogenerated in Si under the GIS parts of the diodes. The
experimental data is supported by numerical simulations of the diodes. Based on
these results, a definition for the true active area in G/Si photodiodes is
proposed, which may serve towards standardization of G/Si based optoelectronic
devices.

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The categories of this paper are: hep-ex
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The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs