Photophysics of Point Defects in ZnO Nanoparticles

Choi, S; Phillips, MR; Aharonovich, I; Pornsuwan, S; Cowie, BCC; Ton-That, C

Photophysics of Point Defects in ZnO Nanoparticles

Choi, S Phillips, MR

Aharonovich, I

Pornsuwan, S Cowie, BCC Ton-That, C

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Publication Type:: Journal Article
Citation:: Advanced Optical Materials, 2015, 3 (6), pp. 821 - 827
Issue Date:: 2015-01-01

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Field	Value	Language
dc.contributor.author	Choi, S	en_US
dc.contributor.author	Phillips, MR https://orcid.org/0000-0003-1522-9281	en_US
dc.contributor.author	Aharonovich, I https://orcid.org/0000-0003-4304-3935	en_US
dc.contributor.author	Pornsuwan, S	en_US
dc.contributor.author	Cowie, BCC	en_US
dc.contributor.author	Ton-That, C https://orcid.org/0000-0003-3276-1739	en_US
dc.date.issued	2015-01-01	en_US
dc.identifier.citation	Advanced Optical Materials, 2015, 3 (6), pp. 821 - 827	en_US
dc.identifier.uri	http://hdl.handle.net/10453/39530
dc.description.abstract	© 2015 WILEY-VCH Verlag GmbH & Co. Zinc oxide (ZnO) nanoparticles have recently been identified as a promising candidate for advanced nanophotonics applications and quantum technologies. This work reports the formation of luminescent point defects and describes their photophysical properties. In particular, it is shown using correlative photoluminescence, cathodoluminescence, electron paramagnetic resonance (EPR), and X-ray absorption near-edge spectroscopy that green luminescence at 2.48 eV and an EPR line at g = 2.00 belong to a surface oxygen vacancy (V<inf>o,s</inf><sup>+</sup>) center, while a second green emission at 2.28 eV is associated with zinc vacancy (V<inf>Zn</inf>) centers. It is established that radiative point defects can be excited in the visible that exhibits nanosecond lifetimes using both above bandgap and sub-bandgap 405 and 532 nm excitation. This work provides important knowledge towards employment of point defects in ZnO in nanophotonics technologies.	en_US
dc.relation	http://purl.org/au-research/grants/arc/DE130100592
dc.relation.ispartof	Advanced Optical Materials	en_US
dc.relation.isbasedon	10.1002/adom.201400592	en_US
dc.title	Photophysics of Point Defects in ZnO Nanoparticles	en_US
dc.type	Journal Article
utslib.citation.volume	6	en_US
utslib.citation.volume	3	en_US
utslib.for	0205 Optical Physics	en_US
utslib.for	0912 Materials Engineering	en_US
utslib.for	0906 Electrical and Electronic Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	/University of Technology Sydney/Strength - CCET - Centre for Clean Energy Technology
pubs.organisational-group	/University of Technology Sydney/Strength - IBMD - Initiative for Biomedical Devices
pubs.organisational-group	/University of Technology Sydney/Students
utslib.copyright.status	closed_access
pubs.issue	6	en_US
pubs.publication-status	Published	en_US
pubs.volume	3	en_US

Abstract:

© 2015 WILEY-VCH Verlag GmbH & Co. Zinc oxide (ZnO) nanoparticles have recently been identified as a promising candidate for advanced nanophotonics applications and quantum technologies. This work reports the formation of luminescent point defects and describes their photophysical properties. In particular, it is shown using correlative photoluminescence, cathodoluminescence, electron paramagnetic resonance (EPR), and X-ray absorption near-edge spectroscopy that green luminescence at 2.48 eV and an EPR line at g = 2.00 belong to a surface oxygen vacancy (Vo,s⁺) center, while a second green emission at 2.28 eV is associated with zinc vacancy (VZn) centers. It is established that radiative point defects can be excited in the visible that exhibits nanosecond lifetimes using both above bandgap and sub-bandgap 405 and 532 nm excitation. This work provides important knowledge towards employment of point defects in ZnO in nanophotonics technologies.

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http://hdl.handle.net/10453/39530