NDLI: Light-emitting Ga-oxide nanocrystals in glass: a new paradigm for low-cost and robust UV-to-visible solar-blind converters and UV emitters

Content Provider	Royal Society of Chemistry (RSC)
Author	Sigaev, Vladimir N. Paleari, Alberto Ignat'eva, Elena S. Lorenzi, Roberto Golubev, Nikita V.
Copyright Year	2014
Abstract	Wide-bandgap nanocrystals are an inexhaustible source of tuneable functions potentially addressing most of the demand for new light emitting systems. However, the implementation of nanocrystal properties in real devices is not straightforward if a robust and stable optical component is required as a final result. The achievement of efficient light emission from dense dispersions of Ga-oxide nanocrystals in UV-grade glass can be a breakthrough in this regard. Such a result would permit the fabrication of low cost UV-to-visible converters for monitoring UV-emitting events on a large-scale – from invisible hydrogen flames to corona dispersions. From this perspective, γ-Ga2O3 nanocrystals are developed by phase separation in Ga-alkali-germanosilicate glasses, obtaining optical materials based on a UV transparent matrix. Band-to-band UV-excitation of light emission from donor–acceptor pair (DAP) recombination is investigated for the first time in embedded γ-Ga2O3. The analysis of the decay kinetics gives unprecedented evidence that nanosized confinement of DAP recombination can force a nanophase to the efficient response of exactly balanced DAPs. The results, including a proof of concept of UV-to-visible viewer, definitely demonstrate the feasibility of workable glass-based fully inorganic nanostructured materials with emission properties borrowed from Ga2O3 single-crystals and tailored by the nanocrystal size.
Starting Page	1763
Ending Page	1774
Page Count	12
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	6
Issue Number	3
Journal	Nanoscale
DOI	10.1039/c3nr05210a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Hydrogen Carrier generation and recombination Corona Nanophase material Gallium(III) oxide Nanocrystal Composite material
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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