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Application of a kind of uranium phosphate crystal material

A crystal material, uranium phosphate technology, applied in luminescent materials, climate sustainability, chemical instruments and methods, etc., can solve problems such as difficult to achieve ultra-wide color gamut, achieve wide color gamut, excellent thermal stability effect

Active Publication Date: 2022-07-29
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention is to solve the technical problem that the existing pc-WLED is difficult to achieve an ultra-wide color gamut greater than 100% NTSC, and to provide an application of uranium phosphate crystal material

Method used

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  • Application of a kind of uranium phosphate crystal material
  • Application of a kind of uranium phosphate crystal material
  • Application of a kind of uranium phosphate crystal material

Examples

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specific Embodiment approach 1

[0027] Embodiment 1: This embodiment is an application of a uranium phosphate crystal, and the uranium phosphate crystal is used as a green light phosphor of a pc-WLED for a backlight source.

specific Embodiment approach 2

[0028] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the preparation method of the uranyl phosphate crystal is as follows: 0.0082g of uranyl nitrate, 0.101g of potassium nitrate, 0.2g of phosphorous acid and 2mL of Deionized water was added to a tetrafluoroethylene-lined autoclave with a volume of 23 mL, and the temperature was raised to 180 ° C and kept for 72 h, and then cooled to room temperature. The crystals are then ground to obtain a powder. Others are the same as the first embodiment.

specific Embodiment approach 3

[0029] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the temperature is raised to 180° C. at 3° C. / min and kept for 72 hours. Others are the same as in the second embodiment.

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Abstract

The application of a uranium phosphate crystal material relates to the field of frontier optoelectronic materials. The present invention is to solve the technical problem that the existing white light LED is difficult to realize the ultra-wide color gamut greater than 100% NTSC. In the present invention, the uranium phosphate crystal material is used as the green light fluorescent powder component in the backlight source pc-WLED. The advantages of the present invention are: 1. The uranium phosphate crystal material has a broad excitation spectrum and a narrow emission spectrum matching with the blue light chip, which is beneficial to realize a wide color gamut; 2. The uranium phosphate crystal has a higher internal and external Quantum efficiency; 3. This uranium phosphate crystal material has excellent chemical and physical stability, excellent thermal stability, water stability and radiation resistance stability; 4. It is compatible with commercial blue light InGaN chips and KSF:Mn 4+ The pc‑WLEDs prepared in combination with red phosphors achieved a wide color gamut exceeding 107.6% NTSC.

Description

technical field [0001] The invention relates to the field of cutting-edge optoelectronic materials, and relates to a high-quality green fluorescent powder for backlight pc-WLED based on uranium phosphate crystal material. Background technique [0002] Nowadays, liquid crystal displays (LCDs) have been integrated into our daily life, covering various display devices such as smartphones, tablet computers, and computer screens. White Light Diodes (WLEDs) are widely used as backlights in display screens to achieve larger color gamut, higher brightness and lower power consumption. Multi-chip WLEDs consisting of red, blue and green multi-chips usually have a wide color gamut. However, the cost of WLED devices prepared by combining multiple chips is high, and the green chips are less efficient than red and blue chips, and have a "green gap" defect. In contrast, pc-WLEDs (white light diodes based on inorganic powdered phosphors), which combine a single LED chip with phosphors, are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/81
CPCC09K11/7709C09K11/7728Y02B20/00
Inventor 刘伟王小泽张李琳
Owner YANTAI UNIV
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