Abstract
Bi2WO6 (BWO) powders synthesized via hydrothermal processes were studied
in order to determine the effect of structure on photoluminescence (PL).
BWO samples were characterized using X-Ray Powder Diffraction, UV-vis
diffuse reflectance, field emission scanning electron microscopy, and PL
intensity measurements. Orthorhombic structures were observed in all
samples. A change in crystal microstructure and optical band gap was
observed. The PL intensity obtained with different samples varied, with
the highest intensity obtained with BWO fabricated with
polyvinylpyrrolidone (PVP). Using Raman spectroscopy, a change in the
microcrystal symmetry from P2(1)ab to B2cb was observed and found to be
responsible for the increase in photoluminescence. (C) 2016 Elsevier
B.V. All rights reserved.
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