Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Distinct photoluminescence in multilayered van der Waals
  heterostructures of MoS2/WS2/ReS2 and BN   Van der Waals heterostructures of (TMDL=1/BNL=1-4/TMDL=1/BNL=1-4), [TMD =
MoS2, WS2, and ReS2] are grown on c-plane sapphire substrate by pulsed laser
deposition under slow kinetic condition. The heterostructure systems show
strong emission around 2.3 eV and subsidiary peaks around 2.8, 1.9, 1.7 and 1.5
eV. BN and TMDs forms type-I heterojunction and the emission peaks observed are
explained in terms of various band to band recombination processes and
considering relative orientation of Brillouin Zones. The emission peak around
2.3eV is promising for solar and photovoltaic application. The observation is
almost similar for three different heterostructure systems.

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The categories of this paper are: econ
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The categories of this paper are: astro-ph
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The categories of this paper are: eess
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The categories of this paper are: adap-org
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The categories of this paper are: acc-phys
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The categories of this paper are: q-alg
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The categories of this paper are: mtrl-th
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The categories of this paper are: atom-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: supr-con
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The categories of this paper are: hep-ex
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The categories of this paper are: math
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-lat
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The categories of this paper are: comp-gas
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The categories of this paper are: solv-int