Synthesis, photoluminescence, and up-conversion luminescence of niobates co-doped with Er³⁺ and Yb³⁺

• HIRANO Masanori

  Department of Applied Chemistry, Faculty of Engineering, Aichi Institute of Technology

• IWATA Hiroyuki

  Department of Electrical and Electronics Engineering, Faculty of Engineering, Aichi Institute of Technology

• TANAKA Kouki

  Department of Applied Chemistry, Faculty of Engineering, Aichi Institute of Technology

抄録

Niobates, CaNb₂O₆ with columbite-type structure doped with Er³⁺ (CaNb₂O₆:Er³⁺) and co-doped with Er³⁺ and Yb³⁺ (CaNb₂O₆:Er³⁺/Yb³⁺) were synthesized from precursor solutions using inorganic salts under mild hydrothermal conditions at 240 °C. The as-prepared niobates appeared to be a sheaf of aligned acicular particles. At 3 mol % Er³⁺, the as-prepared CaNb₂O₆:Er³⁺ showed the strongest photoluminescence (PL) in the characteristic green spectral region corresponding to the ²H_11/2 → ⁴I_15/2 and ⁴S_3/2 → ⁴I_15/2 transitions of Er³⁺. The green PL intensity of the sample doped with 5 mol % Er³⁺ after heating at 1300 °C in air was more than 10 times stronger than that before heating when exciting directly at 377 nm. The effect of the concentration of the sensitizer Yb³⁺ on the up-conversion emission of CaNb₂O₆:Er³⁺/Yb³⁺ was investigated using samples after heating in air. The up-conversion emission intensity of CaNb₂O₆:Er³⁺/Yb³⁺ became the maximum at 5 mol % Er³⁺ and 20 mol % Yb³⁺ under excitation at 980 nm.

収録刊行物

• Journal of the Ceramic Society of Japan

  Journal of the Ceramic Society of Japan 128 (11), 866-874, 2020-11-01

  公益社団法人 日本セラミックス協会

キーワード

• Columbite
• CaNb₂O₆
• Er³⁺
• Yb³⁺
• Photoluminescence
• Up-conversion
• Hydrothermal synthesis

詳細情報

• CRID: 1391130851447885696
• NII論文ID: 130007934287
• DOI: 10.2109/jcersj2.20058
• ISSN: 13486535
• ISSN: 18820743
• Web Site: https://www.jstage.jst.go.jp/article/jcersj2/128/11/128_20058/_pdf
• 本文言語コード: en
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