Up-conversion emission of Er³⁺/Yb³⁺co-doped BaBi₂Nb₂O₉ (BBN) phosphors

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• 作者：M.X. Faç ; anha^a ; ^b ; ^c ; ^{marcello.facanha@uece.br} ; J.P.C. do Nascimento^a ; ^c ; M.A.S. Silva^c ; ^{marceloassilva@yahoo.com.br} ; M.C.C. Filho^d ; A.N.L Marques^e ; A.G. Pinheiro^f ; A.S.B. Sombra^c
• 关键词：Ceramics ; Up-conversion ; Luminescence ; BaBi2Nb2O9
• 刊名：Journal of Luminescence
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：183
• 期：Complete
• 页码：102-107
• 全文大小：1712 K
• 卷排序：183

文摘

On this paper, polycrystalline samples of the tetragonal systems BaBi2Nb2O9 (BBN) and BBN co-doped with Er3+/Yb3+ (BBN: 0.04Er3+yYb3+, where y=0.02, 0.04, 0.06 and 0.08 mol%) were synthesized by the solid state method. The crystalline structure and photoluminescent properties of the ceramic phosphors were investigated by powder X-ray diffraction (PXRD), Raman spectroscopy and spectral analysis of up-conversion (UC) emission. The results reveal that all compositions crystallize in the I4/mmm space group at room temperature, and show UC green emissions (centered at 525 nm and 550 nm) and red (around 660 nm) coming from (2H11/2, 4S3/2→4I15/2) and (4F9/2→4I15/2) transitions, respectively, under excitation at 980 nm. Increasing variations of the Yb3+ sensitizer concentration in the host BBN, lead to a significant intensity increase in both UC emissions due to the efficiency of the energy-transfer process. The BBN: 0.04 mol%Er3+0.08 mol%Yb3+ composition showed the higher intensity bands, thus establishing the BBN as an alternative host material for luminescent centers.