Upconversion luminescence of a transparent glass ceramics with hexagonal Na(Gd,Lu)F4 nanocrystals

JOURNAL OF ALLOYS AND COMPOUNDS

卷:694

Article

Krieke, Guna¹  Sarakovskis, Anatolijs¹  Springis, Maris¹ 

[1] Univ Latvia, Inst Solid State Phys, 8 Kengaraga Stn, LV-1063 Riga, Latvia

关键词: Upconversion;    Luminescence;    Er3+;    Transparent glass ceramics;    Oxyfluoride;   

DOI  :  10.1016/j.jallcom.2016.10.156

来源: Elsevier

【 摘 要 】

Novel Er3+ doped transparent glass ceramics containing hexagonal Na(Gd,Lu)F-4 nanocrystals were prepared from oxyfluoride glasses. The distribution of rare earth ions in the crystalline and glassy phase has been analyzed by X-ray diffraction and erbium luminescence decay kinetics measurement. A strong deviation of rare earth ion content in fluoride nanocrystals in comparison to the base glass has been observed. Preferential incorporation of Gd3+ over Lu3+ ions in the fluoride lattice leads to the stabilization of hexagonal Na(Gd,Lu)F-4 structure and prevents the formation of cubic fluorite type solid solutions. A considerable enhancement of upconversion luminescence correlates with the formation of hexagonal solid solutions and is attributed to an efficient energy transfer between Er3+ ions. (C) 2016 Elsevier B.V. All rights reserved.

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