Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Theory and simulation of photogeneration and transport in Si-SiOx
  superlattice absorbers   Si-SiOx superlattices are among the candidates that have been proposed as
high band gap absorber material in all-Si tandem solar cell devices. Due to the
large potential barriers for photoexited charge carriers, transport in these
devices is restricted to quantum confined superlattice states. As a consequence
of the finite number of wells, large built-in fields and any kind of disorder,
the electronic spectrum can deviate considerably from the minibands of a
regular superlattice. In this paper, a quantum-kinetic theory based on the
non-equilibrium Green's function formalism for an effective mass Hamiltonian is
used to investigate photogeneration and transport in such devices for arbitrary
geometry and operating conditions. By including the coupling of electrons to
both photons and phonons, the theory is able to provide a microscopic picture
of indirect generation, carrier relaxation and inter-well transport mechanisms
beyond the ballistic regime.

24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
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The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
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The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph