Template-free synthesis and luminescent properties of hollow Ln:YOF (Ln = Eu or Er plus Yb) microspheres

JOURNAL OF ALLOYS AND COMPOUNDS

卷:619

Article

Martinez-Castro, E.¹  Garcia-Sevillano, J.²  Cusso, F.²  Ocana, M.¹ 

[1] Inst Ciencia Mat Sevilla CSIC US, Seville 41092, Spain

[2] Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, Spain

关键词: Yttrium oxyfluoride;    Hollow spheres;    Europium;    Erbium;    Luminescence;   

DOI  :  10.1016/j.jallcom.2014.09.023

来源: Elsevier

【 摘 要 】

A method for the synthesis of hollow lanthanide doped yttrium oxyfluoride (YOF) spheres in the micrometer size range with cubic structure based on the pyrolysis at 600 degrees C of liquid aerosols generated from aqueous solutions containing the corresponding rare earth chlorides and trifluoroacetic acid has been developed. This procedure, which has been used for the first time for the synthesis of YFO based materials, is simpler and advantageous when compared with other methods usually employed for the production of hollow spheres since it does not require the use of sacrificial templates. In addition, it is continuous, which is desirable because of practical reasons. The procedure is also suitable for doping the YOF spheres with europium cations resulting in down converting red phosphors when activated with UV light, or for co-doping with both Er3+ and Yb3+ giving rise to up-converting phosphors, which emit intense red light under near infrared (NIR) irradiation. Because of their optical properties and hollow architecture, the developed materials may find applications in optoelectronic devices and biotechnology. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

Free