Rare earth nay(wo4)2:dy3+, ho3+ phosphor and its preparation method

Abstract

Rare earth NaY(WO4)2: Dy3+, Ho3+ fluorescent powder and its preparation method relate to a fluorescent powder and its preparation method. The fluorescent powder uses NaY(WO4)2 as a matrix, Dy3+ as an activator, and Ho3+ as a sensitizer. Under the excitation of 776nm near-infrared light, different color characteristic emission peaks of Dy3+ are obtained, and particles are obtained. The expression is: NaY1-x-y(WO4)2: Dy3+x, Ho3+y; it is applied to the upconversion of biological probe labels The luminescent powder and its preparation method are prepared by doping rare earth Dy3+ ions as an activator, Ho3+ as a sensitizer, and synthesizing an up-conversion phosphor by a hydrothermal method. Under near-infrared excitation at 776nm, the blue emission peak of Dy3+ at 480nm and the yellow emission peak at 577nm are obtained, and the addition of Ho3+ can further increase the upconversion luminescence intensity. The rare earth NaY(WO4)2:Dy3+, Ho3+ up-conversion phosphor obtained by the method has good luminous effect, small particle size and uniform particle size distribution.

Description

technical field [0001] The present invention relates to a kind of fluorescent powder and preparation method thereof, particularly relate to a kind of rare earth NaY (WO 4 ) 2 : Dy 3+ ,Ho 3+ Phosphor powder and its preparation method. Background technique [0002] NaY(WO) with scheelite structure 4 ) 2 It shows good thermal stability and chemical stability, and can adapt to the complex physical and chemical environment in the living body. Take NaY(WO 4 ) 2 It is not uncommon to report doping rare earth ions for matrix materials, and Eu 3+ 、Nd 3+ 、Tm 3+ etc. as activator single-doped or co-doped to synthesize luminescent materials, and the following conversion luminescence is mostly, about NaY(WO 4 ) 2 Doping Dy 3+ ,Ho 3+ upconversion luminescence has not been reported yet. [0003] The most doped in the up-conversion luminescent material is Er 3+ , Yb 3+ 、Ho 3+ 、Nd 3+ Plasma, and 980nm is often used as the excitation wavelength. The present invention NaY (...

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Problems solved by technology

Take NaY(WO 4 ) 2 It is not uncommon to report doping rare earth ions for matrix materials, and Eu 3+ 、Nd 3+ 、Tm 3+ etc. as activator single-doped or co-doped to synthesize luminescent materials, and the following conversion luminescence is mostly, about NaY(WO 4 ) 2 Doping Dy 3+ ,Ho 3+ The upconversion luminescence of

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