Preparation method of organic/inorganic composite luminous silica gel with integrated functions of luminescence and encapsulation and application of silica gel on LED light source

An inorganic composite and functional technology, applied in chemical instruments and methods, luminescent materials, semiconductor devices, etc.

Active Publication Date: 2016-02-03
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the density of phosphor powder is much higher than that of silica gel, phosphor powder will have slow sedimentation or concentration stratification in the mixed phosphor powder glue, which will affect the luminous performance of LEDs.

Method used

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  • Preparation method of organic/inorganic composite luminous silica gel with integrated functions of luminescence and encapsulation and application of silica gel on LED light source
  • Preparation method of organic/inorganic composite luminous silica gel with integrated functions of luminescence and encapsulation and application of silica gel on LED light source
  • Preparation method of organic/inorganic composite luminous silica gel with integrated functions of luminescence and encapsulation and application of silica gel on LED light source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] 1. Preparation of surface-modified europium-containing hydrotalcite:

[0055] 1) will contain 0.006molMgCl 2 Aqueous solution and containing 0.002molAlCl 3 The aqueous solution is prepared as a binary mixed solution A, in which Mg 2+ The concentration is 0.12M;

[0056] 2) Dissolve europium oxide with dilute hydrochloric acid and pour it into A to prepare solution B, in which Mg 2+ :Eu 3+ The molar ratio is 1:0.086;

[0057] 3) Mix 0.001 mol of thienoyltrifluoroacetone and 0.0005 mol of 1,10-phenanthroline in 0.003 mol of sodium stearate at a concentration of 0.1M to prepare mixed slurry C;

[0058] 4) Under strong stirring, add solution B dropwise to mixed slurry C, and after 10 minutes of reaction, add 2.88mL of silane coupling agent KH-550. Use 20% sodium hydroxide aqueous solution to adjust the reaction mixed slurry to pH = 9, age at 80°C for 12 hours, filter with suction, wash the filter cake with water until pH = 7, and filter with suction after precipitatio...

Embodiment 2

[0076] 1. Preparation of surface-modified europium-containing hydrotalcite:

[0077] 1) will contain 0.008molZnCl 2 Aqueous solution and containing 0.003molFeCl 3 The aqueous solution is prepared as a binary mixed solution A, in which Zn 2+ The concentration is 0.16M;

[0078] 2) Dissolve europium oxide with dilute hydrochloric acid and pour it into A to prepare solution B, in which Zn 2+ :Eu 3+ The molar ratio is 1:0.092;

[0079] 3) Pre-mix 0.0022mol of acetylacetone and 0.0007mol of bipyridyl in 0.003mol of sodium dodecylbenzoate with a concentration of 0.12M to prepare mixed slurry C;

[0080]4) Under strong stirring, add solution B dropwise to mixed slurry C, and after reacting for 10 minutes, add 2.56 mL of silane coupling agent KH-570. Use 20% sodium hydroxide aqueous solution to adjust the reaction mixture slurry to pH = 10, age at 75°C for 10 hours, filter with suction, wash the filter cake with water until pH = 8, and filter with suction after precipitation. T...

Embodiment 3

[0098] 1. Preparation of surface-modified terbium-containing hydrotalcite:

[0099] 1) will contain 0.01molCuCl 2 Aqueous solution containing 0.008molCrCl 3 The aqueous solution is prepared as a binary mixed solution A, in which Cu 2+ The concentration is 0.40M;

[0100] 2) Dissolve terbium oxide with dilute hydrochloric acid and pour it into A to prepare solution B, in which Cu 2+ :Tb 3+ The molar ratio is 1:0.12;

[0101] 3) Pre-mix 0.035mol of terephthalic acid and 0.012mol of 2,2-bipyridine in 0.004mol of sodium dodecylbenzenesulfonate with a concentration of 0.26M to prepare mixed slurry C;

[0102] 4) Add solution B dropwise to mixed slurry C, and after microwave reaction for 10 minutes, add silane coupling agent KH-1712.5mL. Use 20% sodium hydroxide aqueous solution to adjust the reaction mixed slurry to pH = 11, age at 70°C for 6 hours, filter with suction, wash the filter cake with water until pH = 7, and filter with suction after precipitation. The cake was dr...

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Abstract

The invention specifically relates to an organic / inorganic composite luminous silica gel with integrated functions of luminescence and encapsulation and a preparation method thereof, and also relates to an application of the silica gel on LED electric light source. The preparation method comprises the following steps: carrying out supermolecular assembly on hydrotalcite and rare earth organic luminous complex, wherein the region isolation effect of nano sheet layers of rigid hydrotalcite can be utilized to inhibit the concentration quench of rare earth complex so as to improve the thermal stability; then introducing fluorescent hydrotalcite is individually introduced into methyl phenyl vinyl silicon resin and methyl phenyl hydrogen-containing silicon resin through a peeling reassembly method to evenly disperse rare earth organic complex into the silicon resin matrix in the molecular level so as to produce luminous methyl phenyl vinyl silicon resin and luminous methyl phenyl hydrogen-containing silicon resin; and finally carrying out silicon-hydrogen addition reactions to produce the luminous silica gel with an encapsulation function. The prepared luminous silica gel can replace the conventional fluorescent powder and encapsulation material in the LED production. The produced LED has better optical homogeneity, and the luminous efficiency of single bulb is also improved.

Description

technical field [0001] The invention belongs to the field of semiconductors, and in particular relates to a class of organic / inorganic composite luminescent silica gel with functions of luminescence and encapsulation and a preparation method thereof, and to applying the luminescence silica gel to an LED electric light source. technical background [0002] A light emitting diode (LED) is an electroluminescent solid-state semiconductor device. Compared with traditional light sources, LED has many advantages such as low energy consumption, high luminous efficiency, long life, no pollution, compact structure, light weight, etc., and has broad application prospects in the fields of lighting, indication and display. [0003] Hydrotalcite is an inorganic substance with a layered crystal structure. Its laminates are positively charged with a thickness of about 0.48nm. It is composed of metal (hydrogen) oxygen octahedrons connected to each other through shared edges, and the layers a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05C08K13/06C08K9/06C08K9/04C08K3/22C08G77/20C09K11/06C09K11/02H01L33/50H01L33/56
Inventor 凌启淡陈鸿章文贡朱海娣
Owner FUJIAN NORMAL UNIV
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