The ultraviolet luminescence of β-galliumsesquioxide

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

“…3 -centered at 460 nm and extended in a broad range of the visible region -matches in fact the spectral features of the dominant luminescence observed in all lightemitting Ga-oxide materials and attributed to radiative V $ O related to DAP recombination of band-to-band excitations. [10][11][12][13][14] Consistently with this attribution, the blue PLE prole in Fig. 3b ranges from the absorption tail (at about 280 nm) to the high energy limit of the present experiment (at the onset of the vacuum UV region), as expected from band-to-band excited radiative recombination.…”

“…4a, is qualitatively consistent with previously detailed studies on stable single-phase b-Ga 2 O 3 systems and doped variants. [10][11][12][13][14] Quantitatively, all values are updated on the basis of the present results on embedded g-Ga 2 O 3 NCs. The main light emission centered at around 460 nm is connected to the occurrence of V $ O sites which can trap electrons from the conduction band.…”

“…[15][16][17] At present, however, data on light emission properties of nanosized Ga oxides are only available for nanopowders and nanowires, or NCs in colloidal solutions. 14,[18][19][20][21][22][23][24][25] A large fraction of those results regard the b-Ga 2 O 3 phase, 4,6,7,[10][11][12][13][14]22 whereas only a few studies concern the metastable polymorph g-Ga 2 O 3 . 5,[18][19][20][21]24,25 No work to our knowledge has ever tackled the task of investigating the intrinsic light emission of g-Ga 2 O 3 NCs dispersed in glass matrices.…”

A Reinvestigation of β-Gallium Oxide

“…Comment fl-Ga203 belongs to the group of potential optical materials among the aluminium and gallium oxides (Geller, 1960(Geller, , 1977, and references therein; Aubay & Gourier, 1992;Harwing, Kellendonk & Slappendel, 1978;Matsumoto, Aoki, Kinoshita & Aono, 1974;Biischer & Lehmann, 1987).…”

Correlation between surface modification and photoluminescence properties of β-Ga2O3 nanostructures

“…1,[3][4][5][6][7][8] It has attracted significant attention as a transparent conducting oxide in optoelectronics, 9,10 solar blind photo detectors, 11 optical waveguides 12,13 and host material for phosphors. 13,14 Besides this, β-Ga 2 O 3 nanostructures show good sensing properties with a reversible response to oxygen (O 2 ) and CO gases.…”