Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Driftfusion: An open source code for simulating ordered semiconductor
  devices with mixed ionic-electronic conducting materials in one-dimension   The recent emergence of lead-halide perovskites as active layer materials for
thin film semiconductor devices including solar cells, light emitting diodes,
and memristors has motivated the development of several new drift-diffusion
models that include the effects of both mobile electronic and ionic charge
carriers. The aim of this work is to provide a comprehensive guide to
Driftfusion, a versatile simulation tool built for simulating one-dimensional
ordered semiconductor devices with mixed ionic-electronic conducting layers.
Driftfusion enables users to model devices with multiple, distinct, material
layers and up to four charge carrier species: electrons and holes by default
plus up to two ionic species. The time-dependent carrier continuity equations
are fully-coupled to Poisson's equation enabling transient optoelectronic
device measurement protocols to be simulated. In addition to material and
device-wide properties, users have direct access to adapt the physical models
for carrier transport, generation and recombination. Furthermore, a
graded-interface approach circumvents the requirement for boundary conditions
at material interfaces and enables interface-specific properties, such as high
rates of interfacial recombination, to be introduced.

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The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
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The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
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The categories of this paper are: alg-geom
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The categories of this paper are: comp-gas
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The categories of this paper are: cmp-lg
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The categories of this paper are: stat
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The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
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The categories of this paper are: econ
5
The categories of this paper are: gr-qc
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-alg
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The categories of this paper are: nlin
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The categories of this paper are: dg-ga