CN109860377A - Using the white light LEDs and preparation method thereof of burst of ultraviolel - Google Patents
Using the white light LEDs and preparation method thereof of burst of ultraviolel Download PDFInfo
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- CN109860377A CN109860377A CN201811517460.6A CN201811517460A CN109860377A CN 109860377 A CN109860377 A CN 109860377A CN 201811517460 A CN201811517460 A CN 201811517460A CN 109860377 A CN109860377 A CN 109860377A
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- quantum dot
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Abstract
The present invention provides a kind of white light LEDs using burst of ultraviolel, including set gradually UV LED chip, green fluorescence glass, coated with the nano-patterned substrate of red quantum dot, the green fluorescence glass is set to the top of the light-emitting surface of the UV LED chip, and the nano-patterned substrate coated with red quantum dot is set on the green fluorescence glass.White light is obtained with UV LED chip excitation green fluorescence glass and red quantum dot, this set can be improved the colour rendering index of white light LEDs；LED is avoided using green fluorescence glass, the phenomenon that aging organic polymer turns yellow is used for a long time, and improved its thermal stability, solves the problems, such as that organic compound can be influenced by phosphor powder layer；Using the nano-patterned substrate for being coated with red quantum dot, pass through nano-patterned substrate structure, it is suppressed that the total reflection of interface, to improve the light extraction efficiency of LED.
Description
Technical field
The present invention relates to White light LED technology field, more particularly, to a kind of white light LEDs using burst of ultraviolel and its
Preparation method.
Background technique
In packaging process of white LED, generallys use blue light for InGaN chip excitation YAG yellow fluorescent powder and obtains white light,
But the color reducibility of this white light LEDs is poor, is easy by phosphor powder layer thickness effect.In addition, by fluorescent powder grain with it is organic
Mixed with polymers, then by this mixture coated in the encapsulation of LED, the coat of mixture obtained by this method is not only warm
Stability is poor, and under long-term heat radiation and ultraviolet irradiation, is easy to happen aging yellowing phenomenon, so as to cause white light LEDs light efficiency
Reduction and reliability decrease.Moreover, and air and glass interface refractive index difference are big in existing fluorescent glass, lead to interface
Locate the enhancing of full transmitting effect, be unfavorable for LED goes out light.
Therefore it provides a kind of white light of the function admirables such as anti-aging flavescence of color reducibility, colour rendering index, fluorescent glass
LED。
Summary of the invention
The present invention provides a kind of white light LEDs using burst of ultraviolel, including set gradually UV LED chip, green
Fluorescent glass, the nano-patterned substrate coated with red quantum dot, the green fluorescence glass are set to the ultraviolet LED core
The top of the light-emitting surface of piece, the nano-patterned substrate coated with red quantum dot are set to the green fluorescence glass
On.White light is obtained with UV LED chip excitation green fluorescence glass and red quantum dot, this set can be improved white light
The colour rendering index of LED；LED is avoided using green fluorescence glass, the phenomenon that aging organic polymer turns yellow is used for a long time, and
It improves its thermal stability, solve the problems, such as that organic compound can be influenced by phosphor powder layer；Using coated with red quantum dot
Nano-patterned substrate, pass through nano-patterned substrate structure, it is suppressed that the total reflection of interface, to improve LED's
Light extraction efficiency.
A kind of preparation method of the white light LEDs using burst of ultraviolel, characterized by the following steps: prepare first
Then red quantum dot is coated on the nano graph substrate and receiving coated with red quantum dot is made by nano graph substrate
Rice graph substrate, then green fluorescence glass is prepared, green fluorescence glass is set to the top of the light-emitting surface of UV LED chip,
The nano graph substrate coated with red quantum dot is then attached to the green fluorescence glass surface, encapsulation can be obtained
The white light LEDs of completion.This method can prepare the above-mentioned white light LEDs using burst of ultraviolel.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the white light LEDs using burst of ultraviolel provided by the invention；
Fig. 2 is a kind of flow chart of the preparation method of the white light LEDs using burst of ultraviolel provided by the invention.
Specific embodiment
Below in conjunction with attached drawing detailed description of the present invention embodiment.
As shown in Figure 1, the present invention provides a kind of white light LEDs using burst of ultraviolel, including the ultraviolet LED core set gradually
Piece 1, green fluorescence glass 3, the nano-patterned substrate coated with red quantum dot, the green fluorescence glass are set to described
The top of the light-emitting surface of UV LED chip, the nano-patterned substrate coated with red quantum dot are set to the green
On fluorescent glass.
White light is obtained with UV LED chip excitation green fluorescence glass and red quantum dot, so that in the spectrum generated
Both contain green color components, also contain red color light component, along with quantum dot has higher colour rendering index compared with fluorescent powder, therefore can be with
Significantly improve the colour rendering index of white light LEDs；LED is avoided using green fluorescence glass, the flavescence of aging organic polymer is used for a long time
The phenomenon that, and improve its thermal stability, solve the problems, such as that organic compound can be influenced by phosphor powder layer；Using being coated with
The nano-patterned substrate of red quantum dot passes through nano-patterned substrate structure, it is suppressed that the total reflection of interface, to mention
The high light extraction efficiency of LED.
Further, the nano-patterned substrate coated with red quantum dot includes nano-patterned substrate 4, quantum
Point film 5, the quantum dot film are set on the nano-patterned substrate.Nano graph is set to using quantum dot film
Change on substrate, more easily realizes the setting of quantum dot.
Further, the quantum dot film is the mixture of red quantum dot solution and uv-curable glue.Quantum dot is molten
Liquid is to provide for the ingredient of transmitting red spectrum, and the effect of uv-curable glue is solidification quantum dot solution, makes quantum dot solution
Form film.
Further, the green fluorescence glass is mixed to prepare by cellulose, glass powder, green emitting phosphor.Glass powder
Effect is the glassy layer to be formed in green fluorescence glass, and the effect of cellulose is so that glassy layer is not fallen off, and green emitting phosphor is
Green spectral in order to obtain.
Further, the green fluorescence glass is set to above the UV LED chip by aluminium cup 2.Pass through aluminium cup
It is supported, simplifies the structure of fluorescent glass.
As shown in Fig. 2, the present invention also provides a kind of preparation methods of white light LEDs using burst of ultraviolel, including walk as follows
It is rapid: to prepare nano graph substrate first, then red quantum dot is coated on the nano graph substrate and is made coated with red
The nano graph substrate of color quantum dot, then green fluorescence glass is prepared, green fluorescence glass is set to going out for UV LED chip
The nano graph substrate coated with red quantum dot is then attached to the green fluorescence glass surface by the top of smooth surface,
The white light LEDs that encapsulation is completed can be obtained.The UV LED chip that can be set gradually by the step, green fluorescence glass,
The white light LEDs of nano-patterned substrate coated with red quantum dot.
Further, specific steps red quantum dot being coated on the nano graph substrate are as follows: will be red
Quantum dot solution and uv-curable glue are mixed to form mixed solution, then wave the toluene solvant in the mixed solution
Hair, the mixture after finally will volatilize are coated on nano graph substrate.Red quantum dot is placed in toluene solvant first, band
The red quantum dot of solvent is easier to be mixed with uv-curable glue, and toluene generates the device of post-production certain in order to prevent
Damage, it is therefore desirable to re-coating is on nano graph substrate after toluene solvant is volatilized.
Further, the specific steps for preparing the nano graph substrate include: first to sapphire substrate surface impurity elimination
Matter then carries out SiO2Steaming degree, then carry out SiO2Dry etching exposure mask, it is rotten followed by the preparation of wet etching exposure mask and wet process
Erosion, finally obtains the nano-patterned substrate.First the impurity of sapphire substrate surface is removed, obtains three purer oxidations
Two aluminium, then pass through SiO2Steaming degree obtains SiO2Protective layer passes through SiO2Dry etching exposure mask makes SiO2Protective layer occurs
Nano patterning pattern, then make sapphire substrate surface nano patterning pattern occur by wet etching exposure mask system, finally
Remove remaining SiO by wet etching2Protective layer is to obtain the nano-patterned substrate.
Further, the green fluorescence glass is prepared method particularly includes: by cellulose, glass powder and green emitting phosphor
It is mixed, the mass parts ratio of the glass powder and fluorescent powder is 4:1, and the mass fraction of the cellulose is random, will be above-mentioned
For mixture by screen-printing deposition in glass surface, the glass is common silica glass, and low in air furnace
Temperature sintering is prepared.The effect of glass powder is the glassy layer to be formed in green fluorescence glass, and the effect of cellulose is so that glass
Glass layer is not fallen off, and green emitting phosphor is green spectral in order to obtain；The mass parts ratio of glass powder and fluorescent powder is set as 4:1,
This set makes the colour rendering index of the white light LEDs made below higher.
Further, the top of the light-emitting surface that green fluorescence glass is set to LED chip method particularly includes: will
Aluminium cup is adhered to above ultraviolet LED by uv-curable glue, by the green fluorescence glass cover on aluminium cup.
The present invention also provides a kind of preparation method of white light LEDs using burst of ultraviolel be used to prepare it is above-mentioned using it is ultraviolet swash
The white light LEDs of hair.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of white light LEDs using burst of ultraviolel, it is characterised in that: including UV LED chip, the green fluorescence set gradually
Glass, the nano-patterned substrate coated with red quantum dot, the green fluorescence glass are set to the UV LED chip
The top of light-emitting surface, the nano-patterned substrate coated with red quantum dot are set on the green fluorescence glass.
2. using the white light LEDs of burst of ultraviolel according to claim 1, it is characterised in that: described to be coated with red quantum dot
Nano-patterned substrate include nano-patterned substrate, quantum dot film, the quantum dot film is set to the nanometer figure
On shape substrate.
3. using the white light LEDs of burst of ultraviolel according to claim 2, it is characterised in that: the quantum dot film is red
The mixture of quantum dot solution and uv-curable glue.
4. using the white light LEDs of burst of ultraviolel according to claim 3, it is characterised in that: the green fluorescence glass is by fibre
Dimension element, glass powder, green emitting phosphor are mixed to prepare.
5. -3 any white light LEDs using burst of ultraviolel according to claim 1, it is characterised in that: the green fluorescence glass
Glass is set to above the UV LED chip by aluminium cup.
6. a kind of preparation method of the white light LEDs using burst of ultraviolel, characterized by the following steps: prepare receive first
Red quantum dot, is then coated on the nano graph substrate and the nanometer coated with red quantum dot is made by rice graph substrate
Graph substrate, then green fluorescence glass is prepared, green fluorescence glass is set to the top of the light-emitting surface of UV LED chip, with
The nano graph substrate coated with red quantum dot is attached to the green fluorescence glass surface afterwards, can be obtained and encapsulated
At white light LEDs.
7. according to claim 6 using burst of ultraviolel white light LEDs preparation method, it is characterised in that: it is described will be red
Quantum dot is coated in the specific steps on the nano graph substrate are as follows: red quantum dot solution is mixed shape with uv-curable glue
At mixed solution, then the toluene solvant in the mixed solution is volatilized, the mixture after finally will volatilize is coated in
On nano graph substrate.
8. according to claim 6 using the preparation method of the white light LEDs of burst of ultraviolel, it is characterised in that: received described in preparation
The specific steps of rice graph substrate include: then to carry out SiO first to sapphire substrate surface decontamination2Steaming degree, then carry out
SiO2Dry etching exposure mask then carries out the preparation of wet etching exposure mask and wet etching, finally obtains the nano patterning lining
Bottom.
9. according to claim 6 using the preparation method of the white light LEDs of burst of ultraviolel, it is characterised in that: prepare described green
Color fluorescent glass method particularly includes: mix cellulose, glass powder and green emitting phosphor, the glass powder and fluorescent powder
Mass parts ratio be 4:1, the mass fraction of the cellulose is random, by screen-printing deposition in glass surface, and in sky
Steam stove low temperature sintering is prepared.
10. according to claim 6 using burst of ultraviolel white light LEDs preparation method, it is characterised in that: it is described will be green
Fluorescent glass is set to the top of the light-emitting surface of LED chip method particularly includes: aluminium cup is adhered to purple by uv-curable glue
Above outer LED, by the green fluorescence glass cover on aluminium cup.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811517460.6A CN109860377A (en) | 2018-12-12 | 2018-12-12 | Using the white light LEDs and preparation method thereof of burst of ultraviolel |
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| CN201811517460.6A CN109860377A (en) | 2018-12-12 | 2018-12-12 | Using the white light LEDs and preparation method thereof of burst of ultraviolel |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104282826A (en) * | 2013-07-10 | 2015-01-14 | 弘大贸易股份有限公司 | Method for manufacturing high-color-rendering white-light solid phosphors and high-color-rendering white-light light-emitting components |
| CN105400514A (en) * | 2015-11-12 | 2016-03-16 | 西安交通大学 | Ordered patterned remote fluorescent crystal material as well as preparation method and application thereof |
| CN206163517U (en) * | 2016-10-10 | 2017-05-10 | 天津中环电子照明科技有限公司 | LED device of transparent surface alligatoring |
| CN108623153A (en) * | 2018-05-08 | 2018-10-09 | 上海应用技术大学 | A kind of preparation method of remote fluorescence film for high-capacity LED |
-
2018
- 2018-12-12 CN CN201811517460.6A patent/CN109860377A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104282826A (en) * | 2013-07-10 | 2015-01-14 | 弘大贸易股份有限公司 | Method for manufacturing high-color-rendering white-light solid phosphors and high-color-rendering white-light light-emitting components |
| CN105400514A (en) * | 2015-11-12 | 2016-03-16 | 西安交通大学 | Ordered patterned remote fluorescent crystal material as well as preparation method and application thereof |
| CN206163517U (en) * | 2016-10-10 | 2017-05-10 | 天津中环电子照明科技有限公司 | LED device of transparent surface alligatoring |
| CN108623153A (en) * | 2018-05-08 | 2018-10-09 | 上海应用技术大学 | A kind of preparation method of remote fluorescence film for high-capacity LED |
Non-Patent Citations (1)
| Title |
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| 王思敏: "荧光玻璃制备及其LED封装应用研究", 《中国博士学位论文全文数据库》 * |
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