Monodisperse, shape-selective synthesis of YF3:Yb3+/Er3+ nano/microcrystals and strong upconversion luminescence of hollow microcrystals. Issue 39 (3rd May 2017)

• Record Type: Journal Article
• Authors: Murali, G.; Kaur, Sandeep; Chae, Young Cheol; Ramesh, Manda; Kim, Jongwoo; Suh, Yung Doug; Lim, Dong-Kwon; Lee, Seung Hee
• Is Part Of: RSC advances. Volume 7:Issue 39(2017)
• Page Start: 24255
• Page End: 24262
• Publication Date: 2017-05-03
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c7ra02188g
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Synthesizing upconversion materials with 3-dimensional structures is of fundamental importance in understanding the relationship between their optical properties and their structures. Abstract : Synthesizing upconversion materials with 3-dimensional structures is of fundamental importance in understanding the relationship between their optical properties and their structures. In this paper, we report a simple but useful synthetic method to produce highly monodisperse 3-dimensional YF3 :Yb 3+ /Er 3+ microcrystals showing variable upconversion efficiencies. By tuning the pH, precursor salt, and solvent, the shapes of the YF3 :Yb 3+ /Er 3+ crystals could be tuned from hollow hexagon to hollow dumbbell, tetragonal bipyramid, and truncated tetragonal bipyramid structures. The upconversion efficiency showed significant dependence on the structure of YF3 :Yb 3+ /Er 3+ ; hollow structures revealed a large enhancement in the luminescence intensity. The upconversion efficiency of the structures decreased in the order hollow hexagon > hollow dumbbell > tetragonal bipyramid > truncated tetragonal bipyramid.