Method for preparing NaYF4:Yb,ER up-conversion fluorescent material by adopting electro-deposition

Abstract

The invention discloses a method for preparing a NaYF4:Yb,ER up-conversion fluorescent material by adopting electro-deposition, which comprises the following steps of: 1) cleaning indium tin oxide (ITO) conductive glass for 2 to 3 times by using acetone, cleaning the ITO conductive glass in an ultrasonic cleaner for 10 to 30 minutes by using deionized water, activating the ITO conductive glass in 10 percent salpeter solution for 10 to 30 seconds; and cleaning with deionized water for later use; 2) adding sodium ascorbate into coordination compound solution consisting of 0.003-0.3mol / L ethylene diamine tetraacetic acid and yttrium ions, ytterbium ions and erbium ions in a molar ratio of (75-94):(5-20):(1-5), adding solution of sodium fluoride, and regulating the pH value to be 5-7 to obtain the electrolyte for later use; and 3) taking the ITO conductive glass as a working electrode, a platinum electrode as a counter electrode, and a saturated calomel electrode as a reference electrode for electro-deposition, and annealing the prepared film. The method has the characteristics of simple equipment, low cost, high deposition rate, low material growth temperature, and capacity of being operated at normal temperature and normal pressure, and is expectedly used for industrial production.

Description

technical field [0001] The invention relates to the preparation of up-conversion fluorescent materials, in particular to a preparation of NaYF by electrodeposition 4 : A method for Yb, Er up-conversion fluorescent materials. Background technique [0002] Up-conversion materials are a class of materials that emit visible light when excited by near-infrared light, and can be widely used in solid-state lasers, display technology, and fluorescent labeling of biomolecules. Generally, upconversion materials include activators, sensitizers, and substrates. Rare earth element Er 3+ With abundant energy levels and long lifetime of some energy levels, it is currently the most researched upconversion activator. Rare earth element Yb 3+ is an effective upconverting sensitizer, Yb 3+ After absorbing 980nm near-infrared light, it can transfer energy to Er 3+ It improves the up-conversion efficiency by 1 to 2 orders of magnitude. The host material must have a low phonon energy so th...

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Problems solved by technology

However, these methods require high temperature, high vacuum, complex equipment, and rigorous experimental procedures, which greatly hinder their general application.

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