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Fluorescent display screen containing up-conversion luminescent material and its preparation method and application

A technology of luminescent materials and display screens, applied in optics, optical components, instruments, etc., can solve the problems of OLED technology threshold and investment quota, high price, and challenges of micro-display, and achieve long service life and low cost. , the preparation method is simple

Active Publication Date: 2020-12-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the technical threshold and investment amount of OLED are very high, the yield rate is very low, especially the service life is short, and the price remains high, which poses even greater challenges to OLED micro-displays

Method used

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  • Fluorescent display screen containing up-conversion luminescent material and its preparation method and application
  • Fluorescent display screen containing up-conversion luminescent material and its preparation method and application
  • Fluorescent display screen containing up-conversion luminescent material and its preparation method and application

Examples

Experimental program
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Embodiment 1

[0060] This embodiment provides a fluorescent display screen containing an up-conversion luminescent material and a preparation method thereof.

[0061] A fluorescent display containing up-converting luminescent materials, such as figure 1 As shown, it consists of a substrate (1), a red fluorescent material layer (2), a second isolation layer (3), a green fluorescent material layer (4), a first isolation layer (5), a blue fluorescent material layer (6) and The protective layer (7) is stacked sequentially.

[0062] The substrate 1 is made of glass.

[0063] The material of the red fluorescent material layer is NaYF doped with ytterbium and erbium 4 ultrafine nanocrystals. Its preparation method is, Y 2 o 3 , Yb 2 o 3 and Er 2 o 3 According to the molar ratio m(Y 3+ ):m(Yb 3+ ):m(Er 3+ )=70:28:2 was dissolved in dilute hydrochloric acid to obtain a rare earth chloride precursor. Add 1 mmol of the above-mentioned rare earth chloride precursor dropwise into a mixed so...

Embodiment 2

[0080] This embodiment provides a fluorescent display screen containing an up-conversion luminescent material and a preparation method thereof.

[0081] The structure and preparation method of the fluorescent display screen containing the up-conversion luminescent material in this embodiment are the same as those in Embodiment 1, except that the red fluorescent material layer is different.

[0082] Wherein, the material of the red fluorescent material layer is KMnF doped with ytterbium, erbium and thulium 3 . The preparation method is as follows: 1.5g of KOH, 2mL of water, 4mL of ethanol and 9mL of OA (90wt%) were mixed at room temperature for ten minutes to obtain a white viscous solution. Then sequentially add 10mL of MnCl 2 solution (0.2mol / L), 15.5mg of YbCl 3 ·6H 2 O (0.4mmol), 1.5mg of ErCl 3 ·6H 2 O (0.04mmol) and 1.5mg of TmCl 3 ·6H 2 O (0.04mmol), stirred vigorously for 20min. Add 8 mL of KF solution (1.25 mol / L) and age for 1 hour to obtain a mixture. The m...

Embodiment 3

[0087] This embodiment provides a fluorescent display screen containing an up-conversion luminescent material and a preparation method thereof.

[0088] The raw materials and preparation method of the fluorescent display screen containing up-conversion luminescent material in this embodiment are the same as those in Example 2, except that there is no second isolation layer between the green fluorescent material layer and the red fluorescent material layer in the fluorescent display screen.

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Abstract

The invention belongs to the technical field of display screen preparation, and specifically relates to a fluorescent display screen containing an up-conversion luminescent material and a preparationmethod and an application thereof. The display screen comprises a substrate, a red fluorescent material layer, a green fluorescent material layer, a first isolation layer, a blue fluorescent materiallayer and a protective layer which are successively superimposed, wherein the green fluorescent material layer and the red fluorescent material layer are further provided with a second isolation layertherebetween. The display screen is made of an ultra-flat transparent material, thereby being capable of avoiding a phenomenon of diffuse reflection. The adopted organic or macromolecular green and blue fluorescent materials are anisotropic, thereby being capable of avoiding a phenomenon of mirror reflection. Saturated red light can be obtained by adopting the up-conversion luminescent material,the light emitting efficiency is high, and the stability is good. When the screen takes laser light as a light source, the resolution reaches up to 10k. The fluorescent display screen is simple in preparation method, low in cost and long in service life. The fluorescent display screen is portable, can be folded and unfolded, water-proof and not driven by electric power, so that the fluorescent display screen can be applied to many fields.

Description

technical field [0001] The invention belongs to the technical field of display screen preparation, and in particular relates to a fluorescent display screen containing an up-conversion luminescent material, a preparation method and application thereof. Background technique [0002] With the rise of VR technology, ultra-high-resolution head-mounted displays will become one of the mainstream wearable devices in the future. Projection display technology is the first choice for VR display technology due to its relatively mature and reliable products. Projection display is a method or device in which the light source is controlled by planar image information, and the image is enlarged and displayed on the projection screen by using the optical system and projection space. However, the low resolution of current projection display limits its application in high-resolution VR devices. [0003] The reason for the low resolution of the projection display is that the viewing angle of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/60G02B27/01
CPCG02B27/0101G03B21/60
Inventor 莫越奇舒伟
Owner SOUTH CHINA UNIV OF TECH
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