Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Synthesis, structural and photo physical properties of perovskite oxide
  (KNbO3)1-X+(La2NiMnO6)X for photovoltaic application   Solid solutions of perovskite oxides (KNbO3)1-x+(La2NiMnO6)x (x=0, 0.1, 0.2
and 0.3) with a variation of band gap (1.33-3.6 eV) have been introduced as a
promising photovoltaic absorber. The structural characterization of the
prepared samples was carried out using X-ray diffraction (followed by Rietveld
refinement) and Raman experiment. As the doping percentage of the monoclinic
La2NiMnO6 in the solid-solution increases, the crystal structure of host KNbO3
becomes more symmetric from orthorhombic to cubic. A large reduction in the
particle size has also been observed in the solid solutions in comparison to
the pure KNbO3. The band gap (~ 1.33 eV) of the synthesized solid solution
x=0.1 is found to be very close to the Shockley-Queisser band gap value of 1.34
eV, which suggests the promising photovoltaic possibility in this material.
Photoluminescence (PL) emission spectra reveal a strong PL quenching in the
solid-solutions in comparison to the KNbO3. The overall structural and optical
studies suggest the promising photovoltaic possibility in KNbO3/ La2NiMnO6
solid solution.

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The categories of this paper are: q-alg
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The categories of this paper are: math
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The categories of this paper are: cs
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The categories of this paper are: q-fin
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The categories of this paper are: mtrl-th
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The categories of this paper are: nucl-th
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The categories of this paper are: ao-sci
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The categories of this paper are: solv-int
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The categories of this paper are: quant-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: nlin
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The categories of this paper are: adap-org
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: gr-qc