Photophysics of Point Defects in ZnO Nanoparticles

Publication Type:
Journal Article
Advanced Optical Materials, 2015, 3 (6), pp. 821 - 827
Issue Date:
Filename Description Size
Thumbnailphotophysics of ZnO emitters.pdfPublished Version2.72 MB
Adobe PDF
Full metadata record
© 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.
Please use this identifier to cite or link to this item: