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Phase‐Selective Nanocrystallization of NaLnF 4 in Aluminosilicate Glass for Random Laser and 940 nm LED‐Excitable Upconverted Luminescence
Author(s) -
Li Xinyue,
Chen Daqin,
Huang Feng,
Chang Guangcai,
Zhao Junjie,
Qiao Xvsheng,
Xu Xuhui,
Du Jincheng,
Yin Min
Publication year - 2018
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.201800030
Subject(s) - materials science , photon upconversion , aluminosilicate , crystallization , luminescence , phase (matter) , doping , hexagonal phase , ceramic , laser , photoluminescence , nanocomposite , dopant , optoelectronics , nanotechnology , chemical engineering , optics , composite material , chemistry , biochemistry , physics , organic chemistry , catalysis , engineering
Yb/Er doped hexagonal β‐NaLnF 4 (Ln = Gd, Y, Lu) are regarded as the most efficient green upconversion (UC) materials. Unfortunately, β‐NaLnF 4 is quite difficult to grow as monocrystal owing to cubic‐to‐hexagonal phase transition during cooling. As an alternative, herein a nanocrystallization controllable strategy to synthesize monodisperse whole‐family β‐NaLnF 4 (from NaLaF 4 to NaLuF 4 ) embedded bulky glass ceramics is reported. A series of structural and spectroscopic characterizations indicate that Na content and Al/Si ratio are the most important factors to determine phase‐selective NaLnF 4 crystallization in the aluminosilicate oxyfluoride glasses. Impressively, such nanocomposites are evidenced to be ideal hosts for upconversion luminescence of Yb 3+ /Er 3+ dopants and as the proof‐of‐concept experiments, their applications in a random laser and incoherent LED‐excitable upconverting device as emitting media are demonstrated. It is expected that this study will provide a deep understanding for controllable crystallization in glass and extend the practical applications of glass ceramics in optoelectronic fields.