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Composite luminescent material and preparation method thereof and light emitting diode (LED) luminescent device

A technology of luminescent materials and packaging materials, which is applied in the direction of semiconductor devices, electrical components, circuits, etc., can solve the problems of limiting white LED luminous efficiency, limited luminous efficiency, non-radiative transition, etc., to speed up the radiative transition rate and improve the internal quantum efficiency , enhance the effect of luminous efficiency

Active Publication Date: 2015-05-06
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the luminous efficiency of the glass-phosphor composite luminescent material mainly depends on the luminous efficiency of the phosphor. The phosphor generally produces non-radiative transitions when emitting light, resulting in energy loss. At the same time, some phosphors in the glass-phosphor may Can not be fully excited, resulting in limited overall luminous efficiency of the glass-phosphor composite luminescent material, thus limiting the luminous efficiency of white LEDs formed by encapsulating the glass-phosphor composite luminescent material

Method used

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  • Composite luminescent material and preparation method thereof and light emitting diode (LED) luminescent device
  • Composite luminescent material and preparation method thereof and light emitting diode (LED) luminescent device
  • Composite luminescent material and preparation method thereof and light emitting diode (LED) luminescent device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The multiple layers of glass 110 and the fluorescent layer 120 in Embodiment 1 are designed in one piece, and the multiple layers of glass 110 are softened and fused together to sandwich the fluorescent layer 120 .

[0026] The material of the metal layer 130 in Embodiment 1 can be selected from metals with good chemical stability, such as metals that are not easily oxidized and corroded, preferably gold, silver, aluminum, copper, titanium, iron, nickel, cobalt, chromium, platinum, palladium, magnesium , zinc, and more preferably at least one of gold, silver, and aluminum, such as a single metal, or an alloy of two or more of the above three metals, such as It is silver aluminum alloy or gold aluminum alloy, wherein the weight fraction of silver or gold is more than 70%.

[0027] The fluorescent powder in the fluorescent layer 120 of embodiment 1 is selected from at least one of red fluorescent powder, yellow fluorescent powder, and green fluorescent powder excited by b...

Embodiment 2

[0038] The preparation process of the composite luminescent material 200 in Example 2 is substantially the same as the preparation process of the composite luminescent material 100 in Example 1, the difference is that in the process of preparing the glass containing the metal layer in step S2, the glass is firstly implanted with ions. Implanting metal ions, the implantation amount of metal ions is preferably 1.7×10-10 mol / cm 2 ~1.7×10 -7 mol / cm 2 , the injection voltage is preferably 20kV ~ 100kV, and a large number of metal ions are formed within the range of less than 200 nanometers from the surface of the glass; then the glass is placed in a reducing atmosphere for annealing, so that the metal ions are reduced to simple substances. During the reduction process Elemental metals may agglomerate, and metal nanoparticles are precipitated inside or on the surface of the glass.

[0039] It can be understood that as long as the interior of at least one layer of glass in the comp...

Embodiment 3

[0049] In this embodiment, the glass composition used is tellurate glass, the glass is ground and polished to form a glass with a thickness of 1mm, and the phosphor is yellow phosphor silicate (provided by Dalian Luming Luminescent Technology Co., Ltd. , the product model is LMS-560-B). The structure of the tellurate phosphor-glass composite luminescent material containing the metal micro-nano structure metal layer is as follows Figure 5 As shown, the preparation process is as follows: First, a layer of gold film with a thickness of 5 nm is formed on the surface of glass 501 and 502 by magnetron sputtering method, and the glass 501 and 502 are placed in a vacuum degree of less than 1×10 -3 Under a vacuum environment of Pa, annealing at a temperature of 500° C. for half an hour, and then cooling to room temperature, the gold film layers 503 and 504 on the glasses 501 and 502 are obtained, and the deposition method is used on the glasses 501 and 504 with metal layers respective...

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Abstract

The invention relates to a composite luminescent material and a preparation method thereof and a light emitting diode (LED) luminescent device. The composite luminescent material comprises a plurality of layers of glass and fluorescent layers positioned among layers of the plurality of layers of glass, wherein a metal layer with a metal micro-nano structure is arranged in at least one of the layers of glass or on a contact surface of at least one of the layers of glass and the fluorescent layers. The metal micro-nano structure is introduced in the composite luminescent material and can form a surface plasma under the action of light rays emitted by a semiconductor chip and light rays emitted by fluorescent powder, and a strong exciting field is formed around the fluorescent powder by using local enhancement characteristic of the surface plasma, so the fluorescent powder can be fully excited and irradiated; moreover, by using energy transfer characteristic between the surface plasma and the fluorescent powder, radiation transition rate of the fluorescent powder is accelerated, and non-radiation transition of the fluorescent powder is suppressed, so the internal quantum efficiency of the fluorescent powder is improved, and the luminous efficiency of an LED packaged by the composite luminescent material is greatly enhanced.

Description

【Technical field】 [0001] The invention relates to the technical field of LED lighting and display, in particular to a composite luminescent material, a preparation method thereof and an LED luminescent device using the composite luminescent material. 【Background technique】 [0002] Traditional glass-phosphor composite luminescent materials not only have good luminous properties, but also can effectively prevent the aging of LED light-emitting devices and the occurrence of glare. However, the luminous efficiency of the glass-phosphor composite luminescent material mainly depends on the luminous efficiency of the phosphor. The phosphor generally produces non-radiative transitions when emitting light, resulting in energy loss. At the same time, there may be some phosphors in the glass-phosphor It cannot be fully excited, resulting in limited overall luminous efficiency of the glass-phosphor composite luminescent material, thereby limiting the luminous efficiency of the white LE...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/50H01L33/56
Inventor 周明杰马文波刘玉刚
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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