Synthesis, photoluminescence, and up-conversion luminescence properties of YTiTaO6:Er3+/Yb3

• Published in: Journal of solid state chemistry 2022-09, Vol.313, p.123316, Article 123316
• Main Authors: Hirano, Masanori, Makino, Hirohide
• Format: Article
• Language: English
• Subjects: Hydrothermal synthesis; Photoluminescence; Up-conversion; YTiTaO6
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2022.123316

The relationship between the factors (i.e. the concentrations of Yb3+ and Er3+ and heating temperature in air) and the properties of photoluminescence (PL) and up-conversion luminescence of YTiTaO6:Er3+/Yb3+ whose crystalline phase depended on heating temperature in air was examined using samples synthesized hydrothermally. The intense green emission (: 2H11/2,4S3/2→4I15/2 transitions of Er3+) was obtained by the excitation at 288 ​nm using the indirect energy transfer from the YTiTaO6 host crystal, which was about 1.8 times stronger than that obtained by the direct excitation at 380 ​nm via the f-f transition (: 4I15/2→4G11/2) of Er3+. Aeschynite phase exhibited intermediate luminescence property. The up-conversion emission intensity increased with increasing heating temperature and became the maximum at x ​= ​0.10 and y ​= ​0.20 with euxenite phase, although the co-presence of Yb3+ gave negative effect on the PL intensity of ErxYbyY1-x-yTiTaO6. As heating temperature rose to 1300–1400 ​°C the intensity of the red up-conversion emission (: 4F9/2→4I15/2 transition) became greater than that of the green emission (: 4S3/2→4I15/2 transition), accordingly the position of the color chromaticity coordinates shifted slightly from green to yellow. The up conversion emission intensity of YTiTaO6: Er3+/Yb3+ increases with increasing heat-treating temperature and becomes the maximum at x ​= ​0.10 and y ​= ​0.20 with euxenite phase, although the presence of Yb3+ gives negative effect on the PL intensity of ErxYbyY1-x-yTiTaO6. [Display omitted] •The PL property of YTiTaO6:Er3+/Yb3+ was investigated using samples formed hydrothermally.•Aeschynite phase exhibits intermediate luminescence property.•The PL intensity of ErxYbyY1-x-yTiTaO6 increases with increasing heat-treating temperature.•The up conversion emission intensity became the maximum at x ​= ​0.10 and y ​= ​0.20 with euxenite phase.