Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: DFT analysis and FDTD simulation of CH3NH3PbI3-xClx mixed halide
  perovskite solar cells: role of halide mixing and light trapping technique   Since perovskite solar cells have attracted a lot of attentions over the past
years, the enhancement of their optical absorption and current density are
among the basic coming challenges. For this reason, first, we have studied
structural and optical properties of organic-inorganic hybrid halide perovskite
CH3NH3PbI3 and the compounds doped by chlorine halogen CH3NH3PbI3-xClx in the
cubic phase by using density functional theory (DFT). Then, we investigate the
light absorption efficiency and optical current density of the single-junction
perovskite solar cell CH3NH3PbI3-xClx for the values (x=0,1,2,3) by utilizing
optical constants (n,k) resulted from these calculations. The results suggest
that increasing the amount of chlorine in the CH3NH3PbI3-xClx compound leads an
increase in bandgap energy, as well as a decrease in lattice constants and
optical properties like refractive index and extinction coefficient of the
structure. Also, the results obtained by simulation express that by taking
advantage of light trapping techniques of SiO2, a remarkable increase of light
absorption will be achieved to the magnitude of 83.13%, which is noticeable.

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The categories of this paper are: comp-gas
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The categories of this paper are: mtrl-th
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The categories of this paper are: adap-org
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The categories of this paper are: stat
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The categories of this paper are: patt-sol
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The categories of this paper are: solv-int
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The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: bayes-an
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The categories of this paper are: q-alg
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The categories of this paper are: alg-geom
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The categories of this paper are: acc-phys
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The categories of this paper are: math
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The categories of this paper are: eess
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The categories of this paper are: math-ph
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The categories of this paper are: nlin