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Polarity control and enhanced luminescence characteristics of semi-polar ZnO nanostructures grown on non-polar MgO(100) substrates
Published in Royal Society of Chemistry
2016
Volume: 6
   
Issue: 95
Pages: 93125 - 93129
Abstract
Enhancing luminescence characteristics is one of the key challenges in ZnO nanostructures for highly efficient UV-blue LEDs and laser diodes. Non-conventional PLD growth parameters have been used to tailor the polar and semi-polar surfaces of ZnO nanostructures on MgO substrates. Despite the similar growth temperature, use of N2 ambient gas allowed the fabrication of well-aligned polar nanostructures; whereas, nanostructures grown with Ar ambient are semi-polar in nature. By means of cathodoluminescence spectroscopy, we demonstrate that the UV emission can be significantly enhanced by 11 times for semi-polar nanostructures. The enhanced luminescence is attributed to reduced polarization electric fields along the c-axis. © 2016 The Royal Society of Chemistry.
About the journal
JournalData powered by TypesetRSC Advances
PublisherData powered by TypesetRoyal Society of Chemistry
ISSN20462069
Open AccessNo
Concepts (14)
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    Electric fields
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    Light emitting diodes
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    Luminescence
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    Programmable logic controllers
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    Zinc oxide
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    CATHODOLUMINESCENCE SPECTROSCOPY
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    Enhanced luminescence
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    Growth parameters
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    LUMINESCENCE CHARACTERISTICS
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    POLAR NANOSTRUCTURE
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    POLAR SURFACES
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    POLARITY CONTROL
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    Zno nanostructures
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    Nanostructures