Violet light excitated bicomponent three basic colour fluorescent powder and its preparation method

A two-component, three-primary color technology, applied in chemical instruments and methods, luminescent materials, etc., can solve problems such as low luminous efficiency

Inactive Publication Date: 2004-03-03
PEKING UNIV
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  • Abstract
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Problems solved by technology

[0002] The research and development of white light phosphors for GaN blue light (emission peak at 460nm) LEDs has made great progress, but its luminous efficiency is low

Method used

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  • Violet light excitated bicomponent three basic colour fluorescent powder and its preparation method
  • Violet light excitated bicomponent three basic colour fluorescent powder and its preparation method
  • Violet light excitated bicomponent three basic colour fluorescent powder and its preparation method

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Embodiment Construction

[0020] 1. 3.9000g Al(OH) 3 , 0.4686g basic magnesium carbonate, 0.9374g barium carbonate, 0.0858g manganese acetate, 0.0440g europium oxide, and 0.2110g lithium fluoride, ground, mixed evenly, and calcined at 1300°C for 4 hours under a reducing atmosphere to obtain light blue-green Powder Ba 0.95 Mg 0.96 Al 10 o 17 :0.05Eu 2+ , 0.04Mn 2+ .

[0021] 2. 3.9000g Al(OH) 3 , 0.4989g basic magnesium carbonate, 0.9768g barium carbonate, 0.0123g manganese acetate, 0.0088g europium oxide, and 0.2110g LiF, ground, mixed evenly, and calcined at 1400°C for 3 hours under a reducing atmosphere to obtain light blue-green powder Object Ba 0.99 Mg 0.99 Al 10 o 17 : 0.01Eu 2+ , 0.01Mn 2+ .

[0022] 3. 3.9000g Al(OH) 3 , 0.3779g basic magnesium carbonate, 0.7894g barium carbonate, 0.3064g manganese acetate, 0.1760g europium oxide, and 0.2110g LiF, ground, mixed evenly, and calcined at 1500°C for 2 hours under a reducing atmosphere to obtain light blue-green powder Object Ba 0.80...

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Abstract

A laser triggered two-element three-primary-color fluorescent powder contains the blue-green powder, which is the barium magnesium aluminate activated by 2-valence Mn and 2-valence Eu and has main emission peaks in blue and green regions, and the red powder, which is the yttrium thioxide activated by 3-valuence Eu and has main emission peak in red region through proportional mixing and high-temp solid-phase reaction.

Description

Technical field: [0001] The invention relates to a fluorescent powder mixture, especially a fluorescent powder that matches the purple light emission of a semiconductor light-emitting diode (LED) to generate white light, and a preparation method. Background technique: [0002] The research and development of GaN blue light (emission peak is 460nm) LED white light phosphor has made great progress, but its luminous efficiency is low. GaN violet LEDs emitting at 390nm-400nm are currently a research hotspot. However, phosphors that absorb purple light and emit white light are difficult to obtain, so it is necessary to mix a single phosphor that absorbs purple light and emits red, green, and blue primary colors. [0003] Chinese patent application "Three-primary-color phosphor excited by purple light-emitting diodes and synthesis method" (CN1397625A, published on February 19, 2003) discloses a three-primary phosphor, the red powder is yttrium-aluminum garnet activated by europiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80
Inventor 杨萍姚光庆段洁菲林建华
Owner PEKING UNIV
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