Upconversion crystal nano-material for infrared ray excited red-green-blue three-color orthogonal fluorescence transmission and preparation method thereof

Abstract

The invention belongs to the technical field of fluorescence nano-materials, and particularly relates to an upconversion crystal nano-material for infrared ray excited red-green-blue three-color orthogonal fluorescence transmission and a preparation method thereof. The nano-material comprises five types of shells, including an upconversion luminous center core, two upconversion luminous shells, an inert isolation layer, an energy transfer layer and an energy absorption layer, wherein the upconversion luminous center core and the energy absorption layers are used for absorbing exciting lights having specific wavelengths; the energy transfer layer is used for transferring energy between the energy absorption layer and a visible light luminous layer; the inert isolation layer is used for isolating each luminous center through an inert material inhibiting energy transfer, so that the fluorescence process of the luminous centers are not impacted one another; and the thickness of each energy absorption layer is adjusted to filter infrared exciting light strengths, so that each energy absorption layer can be used for absorbing energy of infrared exciting lights having different wavelengths respectively, and the energy can be finally transferred to corresponding unused luminous centers. The upconversion crystal nano-material realizes independent fluorescence transmission of red-green-blue three-primary colors, and can be used in the field of volumetric three-dimensional colorful display.

Description

technical field [0001] The invention belongs to the technical field of nano fluorescent materials, and in particular relates to an up-conversion nano crystal material for independent orthogonal fluorescent emission of red, green and blue in the visible light band and a preparation method thereof. Background technique [0002] In the modern information society, the importance of visual information transmission and performance is gradually increasing. Among them, the three-dimensional color display can instantly display the dynamic information of all angles, and is not affected by the viewing angle compared with the plane display. Three-dimensional display technology has broad application prospects in optical information, medical treatment, national defense and other fields. At present, the common virtual three-dimensional display is mainly through the parallax of the human eyes, and the pseudo three-dimensional display is generated by receiving the image difference between t...

AI Technical Summary

Problems solved by technology

However, this method has many limitations so far. On the one hand, in order to solve many problems in the mixing of rare earth elements, a large number of thin layers are doped and bonded layer by layer with optical adhesives. The material manufacturing is very complicated and the size of the material is limited.

At the same time, it shows that the red, green and blue voxels in the body are separated from each other, and the local unevenness is controlled by the thickness of the thin layer. The resolution of the focus is limited by the scale of the thin layer and is relatively low.

On the other hand, this method requires that the two laser beams must accurately intersect at the predetermined position, so the spot cannot be too small, otherwise the two laser beams are difficult to overlap during the scanning process, so the control accuracy of the laser beam position is high, and high resolution The volume pixels are also required to be smaller, and the resolution is therefore limited

In the end, this method can only obtain a resolution of hundreds of microns in centimeter-scale space

Images