Phase‐Selective Nanocrystallization of NaLnF4 in Aluminosilicate Glass for Random Laser and 940 nm LED‐Excitable Upconverted Luminescence. Issue 7 (27th May 2018)

• Record Type: Journal Article
• Authors: Li, Xinyue; Chen, Daqin; Huang, Feng; Chang, Guangcai; Zhao, Junjie; Qiao, Xvsheng; Xu, Xuhui; Du, Jincheng; Yin, Min
• Is Part Of: Laser & photonics reviews. Volume 12:Issue 7(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-05-27
• Subjects: crystallization -- glass ceramica -- NaYF4, random lasers -- upconversion; Lasers -- Periodicals; Photonics -- Periodicals; Lasers -- Périodiques; Photonique -- Périodiques; 621.36
• DOI: 10.1002/lpor.201800030
• Languages: English
• ISSNs: 1863-8880

Abstract

Abstract: Yb/Er doped hexagonal β‐NaLnF4 (Ln = Gd, Y, Lu) are regarded as the most efficient green upconversion (UC) materials. Unfortunately, β‐NaLnF4 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‐NaLnF4 (from NaLaF4 to NaLuF4 ) 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 NaLnF4 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. Abstract : Whole‐family β‐NaLnF4 embedded transparent bulk glass ceramics are fabricated by phase‐selective nanocrystallization in the aluminosilicate glasses. Such nanocomposites are evidenced to be ideal hosts for upconversion luminescence of Yb 3+ /Er 3+ dopants, showing promising applications in random laser and incoherent LED‐excitable upconverting device.