Rear earth-doped luminescent glass for white light emitting diode and preparation method therefor

A technology of rare earth doping and glass, which is applied in lighting engineering technology and optoelectronics field, can solve the problems of insufficient green light emission and achieve high color rendering index, simple process and low cost

Active Publication Date: 2016-01-06
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with many scholars at home and abroad have studied the Pr 3+ As a luminescent ion, it produces white light, but its development is limited due to the problem of insufficient green light emission, and Ho 3+ The luminescence in the visible band is mainly concentrated in the green light region of 540nm, so the introduction of Ho 3+ Can make up for Pr 3+ Insufficient in the application of white light emitting ions

Method used

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  • Rear earth-doped luminescent glass for white light emitting diode and preparation method therefor
  • Rear earth-doped luminescent glass for white light emitting diode and preparation method therefor
  • Rear earth-doped luminescent glass for white light emitting diode and preparation method therefor

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Experimental program
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Effect test

Embodiment 1

[0028] The raw material composition is as shown in Table 1#, and the specific preparation process is as follows:

[0029] According to the molar percentage of the 1# glass composition in the table, calculate the corresponding weight percentage of each composition, weigh each raw material and mix them evenly; put the mixed material into a platinum crucible and melt it in a silicon carbide rod electric furnace at 900 °C until it is completely melted After clarifying for 10 minutes, pour the molten glass on the preheated mold at 300°C; quickly move the glass into a muffle furnace that has been heated to 330°C for annealing, keep it warm for 4 hours, and then lower it to room temperature at a rate of 10°C / hour , and the glass sample was taken out after complete cooling to obtain a rare earth doped fluoride glass.

Embodiment 2

[0031] The raw material composition is as shown in Table 2#, and the specific preparation process is as follows:

[0032] According to the molar percentage of the 2# glass composition in the table, calculate the corresponding weight percentage of each composition, weigh each raw material and mix them evenly; put the mixed material into a platinum crucible and melt it in a silicon carbide rod electric furnace at 910°C until completely melted After clarifying for 15 minutes, pour the molten glass on the mold preheated at 300°C; quickly move the glass into a muffle furnace that has been heated to 340°C for annealing, keep it warm for 6 hours, and then lower it to room temperature at a rate of 10°C / hour , and the glass sample was taken out after complete cooling to obtain a rare earth doped fluoride glass.

Embodiment 3

[0034] The raw material composition is as shown in Table 3#, and the specific preparation process is as follows:

[0035] According to the molar percentage of the 3# glass composition in the table, calculate the corresponding weight percentage of each composition, weigh each raw material and mix them evenly; put the mixed material into a platinum crucible and melt it in a silicon carbide rod electric furnace at 920°C until completely melted After clarifying for 15 minutes, pour the molten glass on the mold preheated at 320°C; quickly move the glass into a muffle furnace that has been heated to 340°C for annealing, keep it warm for 6 hours, and then lower it to room temperature at a rate of 15°C / hour , and the glass sample was taken out after complete cooling to obtain a rare earth doped fluoride glass.

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Abstract

A rear earth-doped luminescent glass for a white light light emitting diode and a preparation method therefor. The method uses rare earth Pr<3+> and Ho<3+> as main uminescent ions that are co-doped in a fluoride glass substrate, and are coordinated with a 445 nm blue LED to excite and emit a white light. The preparation method for the glass comprises three steps: obtaining raw materials, mixing glass batch materials, and melting the glass. The glass provided by the present invention can be excited by a blue light emitting diode to output a white light. The rear earth-doped luminescent glass is a multicomponent ZrF4-ZnF2 glass, and compared with ZBLAN glass, the glass provided by the present invention has the advantages of a higher glass transition temperature, better chemical and mechanical properties and a high luminous efficiency, and the like. Compared with YAG: Ce fluorescent powder, the glass provided by the present invention has the advantages that the preparation method is simple in process, easy to operate, low in cost and the like.

Description

technical field [0001] The invention relates to the field of optoelectronics and lighting engineering technology, in particular to a rare earth-doped luminescent glass for a white light-emitting diode (hereinafter referred to as LED) and a preparation method thereof. technical background [0002] In the 1990s, breakthroughs in blue LED and long-wave ultraviolet excitation diode technology greatly promoted the development of white LED and became a major achievement in the fields of optoelectronics and lighting engineering technology. The development of lighting sources has three major categories: incandescent bulbs, ordinary and compact fluorescent lamps, and various types of high-intensity discharge lamps (HID). They have their own advantages and disadvantages, but in comparison, LED lighting has the characteristics of high efficiency, energy saving and long life, and is a new generation of lighting sources. [0003] Currently on the market, blue LED chips combined with YAG...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/32C03C4/12
Inventor 张瑜陈丹平刘雪强刘力挽郑书培廖喜立胡丽丽
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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