Method for Improving Rare Earth Ion Doped Inorganic Fluoride Upconversion Luminescence Intensity

Abstract

The invention discloses a method for improving up-conversion luminescence intensity of rare earth ion doped inorganic fluoride. According to the method, pre-synthesized rare earth doped inorganic fluoride is mixed with a solution containing alkali metal cations and fluoride ions, an obtained mixture is subjected to a sufficient reaction at a high temperature, the alkali metal cations and the fluoride ions added to the solution all participate in material modification, luminescence quenching centers in the inorganic fluoride can be reduced, and the up-conversion luminescence intensity and the quantum efficiency of the rare earth ion doped inorganic fluoride can be improved greatly.

Description

technical field

[0001] The invention relates to an up-conversion luminescent material, in particular to a method for increasing the up-conversion luminous intensity of a rare earth ion-doped inorganic fluoride. Background technique

[0002] Rare earth ion-doped inorganic fluoride is one of the most efficient rare earth-doped up-conversion luminescent material hosts, which can achieve high-efficiency emission in the visible band under near-infrared light excitation. Inorganic fluoride. Rare earth-doped inorganic fluorides have important applications in the fields of bioimaging and medicine, solar cells, visible displays, optical storage and encryption, and short-wave laser materials. For example: Rare earth-doped inorganic fluoride can be simultaneously excited and detected in the biological light-transmitting window band (700-1100nm), which is a new type of high signal-to-noise ratio, large detection depth, good stability, and non-toxic biological probes , The application ...

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