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Manganese ion activated tantalum-based oxyfluoride red luminescent material and preparation method thereof

An oxide fluoride and red light-emitting technology, which is applied in the direction of light-emitting materials, chemical instruments and methods, climate sustainability, etc., can solve the problems of low color rendering index of devices, limited applications, high color temperature, etc., achieve simple preparation methods, improve color rendering Excellent effect of color index and waterproof stability

Pending Publication Date: 2022-08-09
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Compared with traditional lighting sources, white light diodes (WLEDs) are widely used due to their excellent properties, such as energy saving and environmental protection, high luminous efficiency, convenient use, high reliability and long life, etc. At present, mainstream LED devices are mainly composed of InGaN Blu-ray chip and Y 3 Al 5 o 12 : Ce 3+ (YAG:Ce) yellow phosphor is assembled, but because the YAG:Ce-based white LED emits cool white light, the color rendering index of the device is low (CRI<80) and the color temperature is high (CCT=4000-8000K), thus limiting its further application

Method used

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  • Manganese ion activated tantalum-based oxyfluoride red luminescent material and preparation method thereof
  • Manganese ion activated tantalum-based oxyfluoride red luminescent material and preparation method thereof
  • Manganese ion activated tantalum-based oxyfluoride red luminescent material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0018] a Mn 4+ Doped red fluorescent material, its chemical formula is Cs 30 (Ta 1.98 Mn 0.02 O 2 F 9 ) 9 (OH) 3 ·H 2 O.

[0019] above Mn 4+ The preparation method of doped red fluorescent material, the steps are as follows:

[0020] Weigh K in a molar ratio of 0.01:0.99:2 2 MnF 6 , H 2 NbF 7 and CsF were dissolved in 5 ml of hydrofluoric acid, stirred at room temperature for 30 minutes, centrifuged the solution of the above steps to obtain a precipitate, washed with ethanol three times, and then dried at 75 ° C for 2 hours to obtain the final product red fluorescent material.

Embodiment 2

[0022] a Mn 4+ Doped red fluorescent material, its chemical formula is Cs 30 (Ta 1.94 Mn 0.06 O 2 F 9 ) 9 (OH) 3 ·H 2 O.

[0023] above Mn 4+ The preparation method of doped red fluorescent material, the steps are as follows:

[0024] Weigh K in a molar ratio of 0.03:0.97:2 2 MnF 6 , H 2 NbF 7 and CsF were dissolved in 5 ml of hydrofluoric acid, stirred at room temperature for 30 minutes, centrifuged the solution obtained in the above steps to obtain a precipitate, washed with ethanol three times, and then dried at 75 ° C to obtain the final product red fluorescent material.

Embodiment 3

[0026] a Mn 4+ Doped red fluorescent material, its chemical formula is Cs 30 (Ta 1.90 Mn 0.10 O 2 F 9 ) 9 (OH) 3 ·H 2 O.

[0027] above Mn 4+ The preparation method of doped red fluorescent material, the steps are as follows:

[0028] Weigh K in a molar ratio of 0.05:0.95:2 2 MnF 6 , H 2 NbF 7 and CsF were dissolved in 5 ml of hydrofluoric acid, stirred at room temperature for 30 minutes, centrifuged the solution obtained in the above steps to obtain a precipitate, washed with ethanol three times, and then dried at 75 ° C to obtain the final product red fluorescent material.

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Abstract

The invention discloses a tantalum-based oxyfluoride red luminescent material activated by manganese ions with the chemical formula of Cs30 (Ta2-2xMn2xO2F9) 9 (OH) 3. H2O and a preparation method and application thereof. 0.001 < = x < = 0.1. The material has a very strong broadband absorption peak at about 460 nm, can be excited by a blue light chip, has very strong narrow-peak red light emission at about 630 nm, can be used for improving the color rendering index of an LED device, and can be applied to the field of light emitting devices. And the waterproof stability is far better than that of a commercial K2SiF6: Mn < 4 + > red powder material.

Description

Technical field: [0001] The invention relates to the technical field of inorganic light-emitting materials, in particular to a manganese ion-activated tantalum-based oxyfluoride red light-emitting material and a preparation method thereof. Background technique: [0002] Compared with traditional lighting sources, white light diodes (WLEDs) have been widely used due to their various excellent properties, such as energy saving and environmental protection, high luminous efficiency, ease of use, high reliability and long life. At present, the mainstream LED devices are mainly composed of InGaN. Blu-ray chip and Y 3 Al 5 O 12 :Ce 3+ (YAG:Ce) yellow phosphor is assembled, but because the YAG:Ce-based white LED emits cool white light, the color rendering index of the device is low (CRI<80) and the color temperature is high (CCT=4000-8000K), Thus limiting its further application. [0003] The low color rendering index of the device is caused by the insufficient red light in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/67H01L33/50
CPCC09K11/671H01L33/502Y02B20/00
Inventor 周建邦李俊豪霍见生林利添张秋红丁建红倪海勇
Owner INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI