Flame aerosol deposition of Y2O3:Eu nanophosphor screens and their photoluminescent performance
Abstract
Screens of Y2O3:Eu3 + -nanophosphor (dBET = 24 nm) with coating densities in the range 0.23–3.8 mg cm − 2 were obtained by flame aerosol deposition (FAD) from nitrate-based precursors. The average deposition rate was 0.22 mg cm − 2 min − 1. Porosity of the obtained deposits was 0.973 ± 0.004. Light scattering of the coatings in the visible range showed a Rayleigh-like dependence on wavelength and, in comparison to the screens made of the commercial micrometer-sized phosphor powder (dSEM = 4 µm), was reduced by up to two orders of magnitude. As a result, the nanophosphor coatings maintained nearly constant brightness in a very wide range of coating densities. Furthermore, it should be expected that a substantially improved screen resolution can be achieved with such screens. For excitation at a wavelength of 254 nm, the maximum brightness of the FAD-deposited (Y0.92Eu0.08)2O3 phosphor screens in the transmission mode was nearly one third of that of the screens made of the commercial phosphor. It was demonstrated that light reflection from the supporting substrate and porosity of the coating significantly influence its photoluminescent performance. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000162125Publication status
publishedExternal links
Journal / series
New Journal of PhysicsVolume
Pages / Article No.
Publisher
IOP PublishingOrganisational unit
03510 - Pratsinis, Sotiris E. / Pratsinis, Sotiris E.
More
Show all metadata
ETH Bibliography
yes
Altmetrics