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UV ‐visible absorption and photoluminescence characteristics of SnO 2 nano‐tube/wire arrays fabricated by LPD method
Author(s) -
SadeghzadehAttar Abbas,
AkhavanSafaei Iman,
Bafandeh Mohammad Reza
Publication year - 2018
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12871
Subject(s) - photoluminescence , materials science , raman spectroscopy , absorption (acoustics) , tetragonal crystal system , band gap , absorption spectroscopy , analytical chemistry (journal) , spectroscopy , blueshift , nano , spectral line , optoelectronics , optics , phase (matter) , composite material , chemistry , chromatography , quantum mechanics , astronomy , physics , organic chemistry
In this study, SnO 2 nano‐tube/wire arrays with a diameter in the range of 90‐120 nm and several micrometers in length were synthesized by the liquid phase deposition ( LPD ) method. The study of structural properties was performed by XRD , Raman and TEM , while the optical properties were measured using UV ‐visible absorption and photoluminescence spectroscopy. The Raman spectra of the nano‐tubes/wires revealed the presence of 5 vibration peaks assigned to the tetragonal rutile SnO 2 structure in agreement with the XRD results. The estimated optical direct band gap from UV ‐visible absorption spectra was found to be 3.73‐3.88 eV . The observed blue shift of the optical band gap can be explained by the higher formation of mesoporous particles on the exposed surface to the photons. The photoluminescence ( PL ) spectra of the nano‐tubes/wires exhibited a rather broad and intense emission band centered at around 560‐569 nm.
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