Synthesis and photoluminescence of SiOx nanowires and aligned nanocakes for solar cell applications

The growth of SiO x nanowires and nano-cakes on Au-coated n-type-Silicon (100) substrate via carbothermal evaporation were studied. The standing nanowires were preferred in solar cells to gain more energy. The effects of the Au layer thickness and rapid heating rate on the morphology of obtained SiO...

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Bibliographic Details
Main Authors: Al-Ruqeishi, M. S., Al-Azri, K., Nor, R. M., Amin, Y. M.
Format: Conference Proceeding
Language:English
Subjects:
Gold
Heating
Nanowires
Photoluminescence
Silicon
SiOx nanocakes
Substrates
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Summary:The growth of SiO x nanowires and nano-cakes on Au-coated n-type-Silicon (100) substrate via carbothermal evaporation were studied. The standing nanowires were preferred in solar cells to gain more energy. The effects of the Au layer thickness and rapid heating rate on the morphology of obtained SiO x nanowires were investigated. A broad emission band from 290 to 600 nm is observed in the photoluminescence (PL) spectrum of these nanowires. There are four PL peaks: one blue emission peaks 485 nm (2.56 eV) two green bands centred at 502 nm (2.47 eV) and 524 nm (2.37 eV) for nanocakes and one ultraviolet emission peak at 350 nm (3.54 eV) and a hemisphere curve over the bluish green area taken for SiO x nanowires. These emissions may be related to the various oxygen defects and twofold coordinated silicon lone pair centres.
DOI:10.1109/ISESEE.2011.5977112