Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Broadband perfect light trapping in the thinnest monolayer
  graphene-MoS$_{2}$ photovoltaic cell   The light absorption of a monolayer graphene-molybdenum disulfide
photovoltaic (GM-PV) cell in a wedge-shaped microcavity with a
spectrum-splitting structure is investigated theoretically. The GM-PV cell,
which is three times thinner than the traditional photovoltaic cell, exhibits
up to 98\% light absorptivity in a wide wavelength range. This rate exceeds the
fundamental limit of nanophotonic light trapping in solar cells. The effects of
defect layer thickness, GM-PV cell position in the microcavity, incident angle,
and lens aberration on the light absorption rate of the GM-PV cell is explored.
Regardless of errors, the GM-PV cell can still achieve at least 90\% light
absorptivity with the current technology. Our proposal provides different
methods to design light-trapping structures and apply spectrum-splitting
systems.

8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga