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Rare earth organic complex red luminescent material for 390-420 nm luminous semiconductor chip and preparation method thereof

A light-emitting semiconductor, rare earth organic technology, applied in the direction of light-emitting materials, semiconductor/solid-state device manufacturing, semiconductor devices, etc., can solve the problems of low luminous efficiency, instability, and inability to improve red phosphors, and achieve good color purity.

Inactive Publication Date: 2007-02-07
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The luminous efficiency of these phosphors excited in the near-ultraviolet region is not high, and the luminous efficiency of red phosphors is the lowest and unstable, so that the luminous efficiency of white LEDs, especially the color rendering index, cannot be improved.

Method used

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  • Rare earth organic complex red luminescent material for 390-420 nm luminous semiconductor chip and preparation method thereof
  • Rare earth organic complex red luminescent material for 390-420 nm luminous semiconductor chip and preparation method thereof
  • Rare earth organic complex red luminescent material for 390-420 nm luminous semiconductor chip and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 Eu(BPTFA) 3 2H 2 Synthesis of O:

[0030] Weigh 3.52g Eu 2 o 3 Dissolve in 6mol / L hydrochloric acid, heat to remove excess hydrochloric acid to pH ≈ 4.0, pour into 100mL volumetric flask, add distilled water to make 0.2mol / L EuCl 3 solution.

[0031] Weigh 8.76g of bibenzoyl trifluoroacetone (BPTFA) and dissolve it in ethanol, stir and drop into 3mL 1mol / L NaOH solution, then drop into 50mL 0.2mol / L EuCl 3 solution, adjust pH=6.0-7.0 with 1mol / L NaOH solution, react at 60-70°C for 3h, cool to room temperature, and filter to obtain the product.

Embodiment 2

[0032] Example 2 Eu(DBM) 3 2H 2 Synthesis of O:

[0033] Weigh 3.52g Eu 2 o 3 Dissolve in an appropriate amount of 6mol / L hydrochloric acid, heat to remove excess hydrochloric acid to pH ≈ 4.0, pour into a 100mL volumetric flask, add distilled water to make 0.2mol / LEuCl 3 solution.

[0034] Weigh 6.72g of dibenzoylmethane (DBM) and dissolve it in ethanol, stir and drop into 3mL 1mol / L NaOH solution, then drop into 50mL 0.2mol / L EuCl 3solution, adjust pH=6.0-7.0 with 1mol / L NaOH solution, react at 60-70°C for 3h, cool to room temperature, and filter to obtain the product.

Embodiment 3

[0035] Example 3 Eu(DBM) 3 Synthesis of phen

[0036] Accurately weigh 1mmol Eu(DBM) 3 2H 2 O, dissolved in ethanol, drop into 1 mmol of the second ligand phen ethanol solution, react in a water bath at 60°C for 2 hours, cool and stand still, filter and wash with ethanol to obtain the product. The product obtained was a yellow solid with a yield of 73%. EuC 55 h 41 N 2 o 6 Elemental analysis value (calculated value), %: C 67.76 (67.55), H 4.21 (4.23), N 3.01 (2.87).

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Abstract

the invention discloses a rare earth organic red luminous material and preparing method of 390-420 nm luminous semiconductor chip in the luminous material domain of semiconductor diode, which displays Eubeta3Lx, wherein the Eu is rare earth iron Eu3+; beta is first organic ligand beta-diketone; L is second organic ligand with 2 nitrogen atoms or one oxygen atom as ligand atom; the molar rate of subscript 3 and x in the corresponding composition is x=1 or x=2. The preparing method comprises two steps: first, synthesizing Eubeta3 .2H2O complex; second, synthesizing Eubeta3Lx complex.

Description

technical field [0001] The invention relates to the field of luminescent materials for semiconductor diodes, in particular to a rare earth organic complex red luminescent material for 390-420nm light-emitting semiconductor chips and a preparation method thereof. Background technique [0002] Semiconductor white-light-emitting diode (W-LED) solid-state lighting has many advantages over traditional lighting technologies, such as low energy consumption, high luminous efficiency, and no pollution. It is called a new generation of lighting sources. At present, white light LEDs mainly realize white light through two ways: one is "fluorescence conversion type", that is, a single LED chip and phosphor powder are combined to emit light; the other method is to use a combination of red, green, and blue LED chips to emit light, namely "Multi-chip white LED". [0003] The first method "fluorescence conversion type" is still active in the research of various countries in the world. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06H01L51/54
Inventor 龚孟濂王静苏锵李嘉航方璞向能军石建新
Owner SUN YAT SEN UNIV
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