Photoluminescence of (YGd)₂O₃:Eu phosphors produced by nanoparticle-seeded flame-assisted spray pyrolysis

First published in
IOP conference series / Materials science and engineering  
Number in series
18
Article Number
102018
Citation
IOP Conference Series: Materials Science and Engineering 18 (SYMPOSIUM 7): 102018 (2011)
Contribution to Conference
ICC3: Symposium 7: Optical Ceramics 2011  
Publisher DOI
10.1088/1757-899X/18/10/102018
Scopus ID
2-s2.0-80052089436
Publisher
IOP Publishing Ltd.
We report on synthesis of europium-doped (Y1-xGd x)2O3 by flame-assisted spray py-rolysis in premixed propane/air flames. Phosphor powders with an average particle size on the order of 0.5 μm were obtained from 0.2 M aqueous solutions of the corresponding metal salts. Relative concentration of gadolinium (x) was varied in the range 0 to 1. For excitation at a wavelength of 254 nm, the highest intensity of photoluminescence was achieved for x 0.2 (110% of brightness of the samples without gadolinia). Doping pure yttria and gadolinia with nanoparticles of Y2O3:Eu (dBET 24 nm) was tested. Addition of nanoseeds (up to 50 mol.% in the obtained powders) noticeably decreased surface roughness of phosphor particles. © 2011 Ceramic Society of Japan.
DDC Class
530: Physik