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Phosphor-dispersed glass and method for producing same

A manufacturing method and phosphor technology, applied in chemical instruments and methods, luminescent materials, semiconductor devices, etc., can solve problems such as hindering LED work and resin degradation, and achieve the effects of inhibiting deactivation, high color rendering, and high efficiency

Inactive Publication Date: 2016-03-09
CENT GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Phosphors for LEDs used in lighting are generally mixed with resin sealing materials and mounted on LED light-emitting elements. Over time, moisture penetrates into the resin and hinders the operation of the LED, etc. (for example, Patent Document 2)

Method used

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  • Phosphor-dispersed glass and method for producing same
  • Phosphor-dispersed glass and method for producing same

Examples

Experimental program
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Effect test

Embodiment 1

[0073] Using the fluorine compounds shown in Table 1 as starting materials, the glass raw materials prepared so as to reach the molar ratios of No. 1 to No. 9 in Table 1 were put into a glassy carbon crucible, and the In a 99% nitrogen atmosphere, melt at 980°C for 1 hour, and then quench the melt to obtain fluoride glass.

[0074] Next, the softening temperature (Ts) of the glass was measured. The softening temperature (Ts) was measured using a wide range viscometer (manufactured by Opt, Inc, WRVM-313). The softening temperature (Ts) of the glass is all 500 degrees C or less.

[0075] Next, the obtained glass was pulverized to a median particle size d50=10 μm to form a glass powder, and 5% by mass of a nitride phosphor (CaAlSiN 3 : Eu 2+ , Luminescence center wavelength 630nm) powder, fully mixed. After mixing, they were press-molded into pellets with a diameter of 12 mm and a thickness of 2 mm, and were heated for 1 minute at the softening temperature of each composition...

Embodiment 2

[0095] Samples were obtained in the same manner as in Example 1 except that the fluoride glass having the same composition as No. 6 in Table 1 was used and the phosphor was YAG-Ce.

[0096] The internal quantum efficiency of the YAG-Ce phosphor particles used in the study was measured before sealing the glass, and it was 83%. The internal quantum efficiency of the sample obtained in Example 2 was 74%, and it can be seen that the inactivation of the phosphor can be suppressed. It was confirmed that the fluoride glass used in the present invention can also be used for sealing oxide phosphors.

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Abstract

This phosphor-dispersed glass comprises phosphor particles and a phosphor sealing material. The phosphor-dispersed glass is characterized in that the phosphor sealing material is a fluoride glass and the fluoride glass composition consists of 1-45 mol% of AlF3, a total of 30-60 mol% of Hf fluoride and Zr fluoride, a total of 20-65 mol% of alkaline earth fluoride, a total of 2-25 mol% of a fluoride of at least one element selected from the group consisting of Y, La, Gd, and Lu, and a total of 0-20 mol% of a fluoride of at least one alkali metal selected from the group consisting of Na, Li, and K. With this phosphor-dispersed glass, it is possible to prevent deactivation of the phosphor, regardless of the type of phosphor used.

Description

technical field [0001] The present invention relates to fluoride glasses capable of sealing luminescent materials without deactivating the luminescent materials. Background technique [0002] In recent years, incandescent lamps as lighting sources have been gradually replaced by white LEDs, and white LEDs with low power consumption and high color rendering are required. At present, most white LEDs are composed of quasi-white that combines YAG-Ce yellow oxide phosphors and blue GaN-based LEDs. [0003] In this conventional combination of blue LED and YAG-Ce, there are few components of cyan (~500nm) and red (600nm) and therefore, the insufficient wavelength components are compensated by adding various phosphors. For example, in Patent Document 1, a white light source with high color rendering is realized by adding an Eu complex that emits red light to a YAG-Ce phosphor. [0004] In addition, in recent years, nitride phosphors have been proposed as high-efficiency red phosph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C4/12C03C3/32H01L33/50
CPCC03C3/325C03C2214/30H01L33/501C03C14/006C09K11/77348
Inventor 冈本英之春日健关康平近江伸
Owner CENT GLASS CO LTD
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