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A General Strategy for Tailoring Upconversion Luminescence in Lanthanide-Doped Inorganic Nanocrystals through Local Structure Engineering

Abstract

Local structure around lanthanide (Ln3+) emitters in Ln3+-doped upconversion nanocrystals (UCNCs) is of fundamental importance in tailoring their upconversion luminescence (UCL) features. However, the general strategy responsible for the local-structure-dependent UCL in Ln3+-doped UCNCs has not been conclusively established to date. Herein, we report a new class of alkaline zirconium fluoride-based Yb3+/Er3+ co-doped UCNCs featuring a diversity of crystallographic structures for Ln3+ ion doping, which thereby allow us to thoroughly understand the origin underlying the local-structure-dependent UCL of Er3+ ion for the first time. We reveal that the high-symmetry crystal lattice of Yb3+/Er3+ co-doped UCNCs may incur the large UCL red-to-green intensity ratio of Er3+ regardless of their identical elemental compositions. In combination with the first-principle calculations, we show that such local-structure-dependent UCL of Er3+ is primarily due to the varied electronic band structures induced by the Yb3+/Er3+ doping in different crystallographic structures of alkaline zirconium fluorides. These findings may open up a new avenue for constructing high-quality UCNCs with tailored UCL profile and lifetime for diverse applications.

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Publication details

The article was received on 22 Feb 2018, accepted on 15 Apr 2018 and first published on 16 Apr 2018


Article type: Paper
DOI: 10.1039/C8NR01519H
Citation: Nanoscale, 2018, Accepted Manuscript
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    A General Strategy for Tailoring Upconversion Luminescence in Lanthanide-Doped Inorganic Nanocrystals through Local Structure Engineering

    H. Fu, P. Peng, R. Li, C. Liu, Y. Liu, F. Jiang, M. Hong and X. Chen, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR01519H

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