Synthesis and upconversion luminescence spectra of (Y1–x–yYbxEry)2O2S solid solutions

• Published in: Inorganic materials 2017, Vol.53 (2), p.200-206
• Main Authors: Andreev, P. O., Sal’nikova, E. I., Andreev, O. V., Denisenko, Yu. G., Kovenskii, I. M.
• Format: Article
• Language: English
• Subjects: Chemistry; Chemistry and Materials Science; Erbium; Industrial Chemistry/Chemical Engineering; Inorganic Chemistry; Luminescence; Materials Science; Solid solutions; Upconversion; Ytterbium; Yttrium
• ISSN: 0020-1685; 1608-3172
• DOI: 10.1134/S0020168517020029

Sequentially exposing coprecipitated yttrium, ytterbium, and erbium sulfates to flowing H 2 at 500–600°C for 6 h and then to flowing H 2 S at 1000°C for ≤7 h, we obtained single-phase samples of the following solid solutions: (1) (Y 0.97 Er 0.02 Yb 0.01 ) 2 O 2 S ( а = 3.779 Å, с = 6.579 Å), (2) (Y 0.94 Er 0.05 Yb 0.01 ) 2 O 2 S ( а = 3.783 Å, с = 6.572 Å), (3) (Y 0.91 Er 0.07 Yb 0.02 ) 2 O 2 S ( а = 3.775 Å, с = 6.568 Å), (4) (Y 0.87 Er 0.10 Yb 0.03 ) 2 O 2 S ( а = 3.772 Å, с = 6.559 Å), (5) (Y 0.82 Er 0.15 Yb 0.03 ) 2 O 2 S ( а = 3.770 Å, с = 6.545 Å), and (6) (Y 0.96 Yb 0.03 -Er 0.01 ) 2 O 2 S ( a = 3.780 Å, c = 6.580 Å). The observed chemical transformations were accompanied by a transition from powder particles 2–25 μm in size to agglomerates 30–50 μm in size. The upconversion luminescence intensity in the samples was found to have a maximum: 400 (1), 3750 (2), 2100 (3), 1100 (4), and 150 arb. units (5). The presence of (Y 0.96 Yb 0.03 Er 0.01 ) 2 O 3 and (Y 0.96 Yb 0.03 Er 0.01 ) 2 S 3 as impurity phases in the samples was shown to considerably reduce the luminescence intensity.