Bismuth ion-doped borate narrow-band blue fluorescent powder, preparation method thereof and luminescent device

A blue phosphor, borate technology, applied in semiconductor devices of light-emitting elements, optical elements for changing the spectral characteristics of emitted light, light-emitting materials, etc. Reduce, hinder application and other problems, achieve the effect of excellent thermal stability

Active Publication Date: 2021-11-30
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chemical stability and fluorescence stability are poor, broadband emission, after repeated use, the luminescence center changes from Eu 2+ Oxidized to Eu 3+ results in reduced luminous intensity and is not efficiently excited by near-ultraviolet light, which hampers its application in near-ultraviolet LED-based devices

Method used

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  • Bismuth ion-doped borate narrow-band blue fluorescent powder, preparation method thereof and luminescent device
  • Bismuth ion-doped borate narrow-band blue fluorescent powder, preparation method thereof and luminescent device
  • Bismuth ion-doped borate narrow-band blue fluorescent powder, preparation method thereof and luminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment provides a narrowband emission blue phosphor, and the specific preparation method is as follows:

[0042] a) Take the mole ratio 3: 1.9999: 6: 0.00001 Baco 3 Lu 2 O 3 H 3 BO 3 Bi 2 O 3 As a raw material, it is placed in an agate mortar and plasted in the alumina crucible after 30 minutes, and the calcination is 6 hours at 600 ° C; the pre-pre-feetted sample is removed, and the alumina is placed again. In the crucible, the calcination is continued at 910 ° C for 24 hours, and the furnace is cooled to room temperature;

[0043] b) Step A) The sintered body obtained into powder, that is, chemically composed of BA 3 Lu 1.9999 B 6 O 15 : 0.0001Bi 3+ BI 3+ Doped borate blue phosphor.

Embodiment 2

[0045] This embodiment provides a narrowband emission blue phosphor, and the specific preparation method is as follows:

[0046] a) Take the mole ratio 3: 1.99: 6: 0.01 Baco 3 Lu 2 O 3 H 3 BO 3 Bi 2 O 3 As a raw material, it is placed in an agate mortar and plasted in the alumina crucible after 30 minutes, and the calcination is 6 hours at 600 ° C; the pre-pre-feetted sample is removed, and the alumina is placed again. In the crucible, the calcination is continued at 910 ° C for 24 hours, and the furnace is cooled to room temperature;

[0047] b) Step A) The sintered body obtained into powder, that is, chemically composed of BA 3 Lu 1.99 B 6 O 15 : 0.01bi 3+ BI 3+ Doped borate blue phosphor.

Embodiment 3

[0049] This embodiment provides a narrowband emission blue phosphor, and the specific preparation method is as follows:

[0050] a) Take the mole ratio 3: 1.97: 6: 0.03 Baco 3 Lu 2 O 3 H 3 BO 3 Bi 2 O 3 As a raw material, it is placed in an agate mortar and plasted in the alumina crucible after 30 minutes, and the calcination is 6 hours at 600 ° C; the pre-pre-feetted sample is removed, and the alumina is placed again. In the crucible, the calcination is continued at 910 ° C for 24 hours, and the furnace is cooled to room temperature;

[0051] b) Step A) The sintered body obtained into powder, that is, chemically composed of BA 3 Lu 1.97 B 6 O 15 : 0.03bi 3+ BI 3+ Doped borate blue phosphor.

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Abstract

The invention provides bismuth ion-doped borate narrow-band blue fluorescent powder. The chemical formula of the bismuth ion-doped borate narrow-band blue fluorescent powder is Ba3RE2-xB6O15:xBi<3+>, wherein the RE comprises any one or a combination of more of Y, Lu and Gd; x is larger than or equal to 0.001 and is less than or equal to 0.2. The emission peak value of the fluorescent material provided by the invention is located at 413nm under near ultraviolet excitation, the half-peak width is only 35.5 nm, and the color purity is as high as 97.76%. An excitation band extends from 300 nm to 400 nm, the maximum excitation is achieved at the position of 365 nm, the material can be effectively excited by near ultraviolet light, and the internal quantum efficiency is as high as 90.6. Moreover, the series of fluorescent powder has excellent thermal stability, can still keep about 85% of room temperature emission intensity at 150 DEG C, meets the requirements of practical application, and can be used as a light conversion material of ultraviolet and near ultraviolet LED chips and a narrow-band blue light emitting source.

Description

Technical field [0001] The present invention relates to rare earth luminescent materials technology, and particularly relates to bismuth borate ion doping narrowband blue phosphor and the light emitting device and its preparation method. Background technique [0002] The phosphor-converted white light emitting diode because of its high luminous efficiency, long life and environment-friendly, and is widely used in backlit display applications. Phosphor material for a back light display, narrow-band emission is a necessary condition, narrow-band emission is conducive to a wide color gamut, faithful reproduction of natural colors, to improve the visual effect pc-wLED emission, and the color gamut of red / green / blue (RGB) color coordinates of the phosphor decision. Blue fluorescent material as the fluorescent material in the three primary colors indispensable component, can significantly improve the luminous efficiency and color rendering index, emission efficiency has a great inf...

Claims

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Application Information

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IPC IPC(8): C09K11/78F21V9/32H01L33/50F21Y115/10
CPCC09K11/7712F21V9/32H01L33/502H01L33/504F21Y2115/10Y02B20/00
Inventor 李成宇王尚巍庞然张洪杰姜丽宏张粟李达
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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