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Rare earth doping luminescent glass for white radiation LED and producing thereof

A technology of rare earth doping and luminescent glass, which is applied in the field of luminescent glass doped with rare earth ions for white LEDs, and can solve the problems of easy aging of epoxy resin, high cost, and easy drift of white light

Inactive Publication Date: 2008-12-03
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the following defects at the same time: (a) the epoxy resin used for packaging is easy to age, (b) the cost is high, (c) the white light is easy to drift, etc.

Method used

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  • Rare earth doping luminescent glass for white radiation LED and producing thereof
  • Rare earth doping luminescent glass for white radiation LED and producing thereof
  • Rare earth doping luminescent glass for white radiation LED and producing thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Using analytically pure CaCO 3 、BaCO 3 , SiO 2 、H 3 BO 3 、Al 2 o 3 and 99.99% Tb 4 o 7 、Eu 2 o 3 and Ce(NO 3 ) 3 ·6H 2 O is the main raw material, according to 40SiO 2 5B 2 o 3 25CaO 23BaO 7Al 2 o 3 :0.25Ce 2 o 3 0.125Tb 2 o 3 0.5Eu 2 o 3 (mol%) composition takes batching material 100g, and each raw material quality is as shown in table 1:

[0019] The glass composition mol% of table 1 embodiment 1 (SCB 3)

[0020]

[0021] After accurate weighing, mix in a V-blender for 4 hours. The batch is placed in a corundum crucible and firstly kept at 550°C for 1.5 hours, and then placed in an electric furnace at 1550°C for 3 hours. The molten glass is poured into a preheated mold and annealed at 600°C for 3 hours to obtain SCB3. The excitation spectrum of the glass is 376nm, and the main emission wavelengths of the three rare earth ions are Ce 3+ : 488nm, Tb 3+ : 542nm and Eu 3+ : 612nm, the relative intensity ratio (R:G:B) is: 0.62:1:1.01, the co...

Embodiment 2

[0023] Example 2 (SCB 1): 45SiO 2 25CaO 23BaO 7Al 2 o 3 :0.25Ce 2 o 3 0.125Tb 2 o 3 0.5Eu 2 o 3 , Example 3 (SCB 2): 45SiO 2 25CaO 23BaO 7Al 2 o 3 :0.25Ce 2 o 3 0.125Tb2 o 3 0.75Eu 2 o 3 , Example 4 (SCB 4): 35SiO 2 10B 2 o 3 25CaO 23BaO 7Al 2 o 3 :0.25Ce 2 o 3 0.125Tb 2 o 3 0.75Eu 2 o 3 , Example 5 (SCB5): 45SiO 2 25CaO 23BaO 7Al 2 o 3 :0.5Tb 2 o 3 0.5Eu 2 o 3 , Example 6 (SCB6): 45SiO 2 25CaO 23BaO 7Al 2 o 3 :0.5Tb 2 o 3 1.0Eu 2 o 3 The preparation process of the medium-luminescent glass is similar to that of Example 1, and the total amount of batch materials is 100 g. The quality of each raw material and the luminescent performance parameters are shown in attached tables 1 and 2.

[0024] Schedule 1

[0025] Composition of Examples 2-6

[0026]

[0027] Schedule 2

[0028] The luminous performance parameter of embodiment 2-6

[0029]

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Abstract

The invention discloses rare earth doped luminescent glass for a white light LED and a preparation method thereof. The rare-earth ions of Tb3+, Eu3+ and Ce3+ are used as main compositions; the rare-earth ions are added into a (borate) silicate glass substrate by double-doping or codoping and matched with an ultraviolet LED chip to emit white light. The preparation method comprises three steps of: (a) the selection of raw materials, (b) the mixing of glass batch; and (c) the melting of glass. The kind of glass can effectively be excitated by ultraviolet light and generates emission in a blue light (B) zone, a green light (G) zone and a red light (R) zone, thereby compounding into white light.

Description

technical field [0001] The invention relates to a luminescent material in the fields of luminescent electronics and lighting engineering technology and a preparation method thereof, in particular to luminescent glass doped with rare earth ions for white LEDs. Background technique [0002] In the 1990s, technological breakthroughs and industrialization of blue LEDs and long-wave ultraviolet excitation diodes greatly promoted and realized the development of white light-emitting diodes, which became a major achievement in the fields of optoelectronics and lighting engineering technology. The development of lighting sources has three categories: incandescent bulbs, ordinary and compact fluorescent lamps and various types of high-intensity discharge lamps (HID). They have their own advantages and disadvantages, and they all belong to vacuum electric light source devices. White LED is a new solid light source. Among them, the white light LED based on the semiconductor compound I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C4/12C03C3/095C03C3/068C03C3/062
Inventor 梁晓峦杨云霞袁双龙陈国荣
Owner EAST CHINA UNIV OF SCI & TECH
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