Synthesis of monodispersed hierarchical Yb(OH)xF3−x microcrystals and their conversion to Yb6O5F8. (October 2017)

• Record Type: Journal Article
• Authors: Zhuang, Jianle; Zhou, Wan; Lin, Huihong; Huang, Ziran; Cai, Yijin; Lei, Bingfu; Zhang, Haoran; Liu, Yingliang
• Is Part Of: Materials research bulletin. Volume 94(2017)
• Page Start: 489
• Page End: 492
• Publication Date: 2017-10
• Subjects: Crystal growth -- Phosphors -- Microstructure -- Optical properties; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2017.07.002
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Monodispersed hierarchical Yb(OH)x F3−x microcrystals assembled by nanorod arrays were synthesized. Yb(OH)x F3−x can be transformed to Yb6 O5 F8 with the retention of morphology. Crystallographic relationship between Yb(OH)x F3−x and Yb6 O5 F8 and their transformation mechanism were disclosed. Abstract: The fabrication of rare earth luminescent materials with monodispersed and hierarchical morphology is of great importance due to their various applications. In this report, monodispersed hierarchical Yb(OH)x F3−x microcrystals assembled by nanorod arrays were synthesized by a mild hydrothermal route. Calcination of Yb(OH)x F3−x resulted in the formation of Yb6 O5 F8 with the retention of morphology. The crystallographic structure relationship between Yb(OH)x F3−x and Yb6 O5 F8 and the transformation mechanism from Yb(OH)x F3−x to Yb6 O5 F8 were disclosed. The upconversion emission properties of the Er 3+ doped samples were investigated. It can be found that Yb6 O5 F8 : 5%Er 3+ exhibited an intense red light upconversion emission with the strongest peaks around 658 nm while Yb(OH)x F3−x : 5%Er 3+ shows no upconversion emission.