CN107619485A - Inorganic perovskite quantum dot syndiotactic polytyrene laminated film and preparation method thereof - Google Patents
Inorganic perovskite quantum dot syndiotactic polytyrene laminated film and preparation method thereof Download PDFInfo
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- CN107619485A CN107619485A CN201710804918.5A CN201710804918A CN107619485A CN 107619485 A CN107619485 A CN 107619485A CN 201710804918 A CN201710804918 A CN 201710804918A CN 107619485 A CN107619485 A CN 107619485A
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Abstract
The invention discloses a kind of inorganic perovskite quantum dot syndiotactic polytyrene laminated film and preparation method thereof, the laminated film is the syndiotactic polytyrene plastic sheeting of 50 200 μ m-thicks, wherein being embedded with without any surfactant molecule, the CsPbBr that size is 2 3nm3Quantum dot.The present invention is using waterproof and the stereospecific polymerized styrene plastics of densification are as CsPbBr3The carrier of quantum dot, CsBr and PbBr2For raw material, N, N dimethylformamides are solvent, and using the crystallization phase process of plastic material, quantum dot voluntarily separates out in polymeric inner, and the laminated film is made.Laminated film made from present invention preparation maintains the characteristics of luminescence of quantum dot, and has high stability, is dipped into water and still keeps green emission performance, and is placed 2 months in humid air, and its emission spectrum does not have significant change.
Description
Technical field
The invention belongs to optical thin film preparation field, is answered more particularly to a kind of inorganic perovskite quantum dot syndiotactic polytyrene
Close film and preparation method thereof.
Background technology
Halide perovskite quantum dot is a kind of high-performance luminescent material just to grow up in recent years.Compared to traditional
CdSe quantum dots, halide perovskite quantum dot emission peak is narrower, brightness is higher, and is not limited by foreign patent barrier,
Therefore illuminating and the concern in display field by domestic industry circle.Especially in display field, launch the perovskite of green glow
Quantum dot（Including CH3NH3PbBr3And CsPbBr3Two kinds）, because its emission peak is close to pure green（510nm wavelength）, and it is monochromatic
Property it is good, the true colour display screen for being advantageously implemented high color reproduction degree shows, therefore deep is praised highly by professional.
However, the material can't be applied directly at present, its reason is that this material is unstable under humidity environment.Even if
It is packaged with conventional polymer, such as silica gel, acrylic glue, obvious decay of luminescence phenomenon is still presented in the material.
According to the research conclusion of forefathers, want to make this material settling out needs：1st, the environment of exhausted water anoxybiotic；2nd, preferably by calcium
The active agent molecule of titanium ore quantum dot surface coordination removes, it is big to use molecular weight instead and the not apolar polymeric of hydroxyl or oxygen element
Thing.But in actual use, it is difficult to introduce the environment of exhausted water anoxybiotic；And the generation of quantum dot must use surface-active again
Agent, it otherwise can be only formed large-sized crystal.Therefore, the perovskite quantum dot product that disclosure satisfy that practical application how is made,
The problem of always domestic industry circle perplexs.
The present invention proposes that one kind voluntarily separates out CsPbBr in syndiotactic polytyrene crystallization process3The method of quantum dot, system
It is standby to have gone out there is the CsPbBr of superior luminescence performance and high stability3Quantum dot syndiotactic polytyrene film.Due to a rule polyphenyl
Vinyl plastics waterproof and densification, the CsPbBr being embedded3Quantum dot is well-protected, and the material compares simple quantum dot material
Material is with the moisture resistance and stability being obviously improved.
The content of the invention
It is an object of the invention in view of the shortcomings of the prior art, providing a kind of CsPbBr3Quantum dot syndiotactic polytyrene is answered
Close film and preparation method thereof.The present invention is using waterproof and the stereospecific polymerized styrene plastics of densification are as CsPbBr3The load of quantum dot
Body, the characteristics of luminescence of quantum dot is maintained, and there is high stability, be dipped into water and still keep green emission performance, and
Placed 2 months in humid air, its emission spectrum does not have significant change.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of CsPbBr3Quantum dot syndiotactic polytyrene laminated film, the laminated film advise polyphenyl second between 50-200 μ m-thicks
It is embedded without any surfactant molecule, the CsPbBr that size is 2-3nm in alkene plastics film3Quantum dot.The CsPbBr3
The preparation method of quantum dot syndiotactic polytyrene laminated film, in syndiotactic polytyrene crystallization process, made by split-phase effect
CsPbBr3Quantum dot separates out, and specifically includes following steps：
（1）By syndiotactic polytyrene powder, CsBr, PbBr2Be dissolved in together in DMF solvent, wherein solvent and
The mass ratio of syndiotactic polytyrene is 10:1, and syndiotactic polytyrene, CsBr and PbBr2Mass ratio be 50:0.35:0.65；
Solute is fully dissolved to later solution and is coated onto film forming on glass plate；
（2）By step（1）Film solidify 1 hour in the environment of 30 DEG C, 50KPa, then placed under 90 DEG C, atmospheric pressure environment
1 hour, finally take off to form CsPbBr3Quantum dot syndiotactic polytyrene film.
The beneficial effects of the present invention are：
（1）The present invention separates out quantum dot split-phase in polymer crystallization process, does not use any surfactant molecule；
（2）Syndiotactic polytyrene used in the present invention is the polymer of a kind of waterproof and densification, and the quantum dot being embedded has
High stability；
（3）Even if laminated film produced by the present invention, which is dipped into water, still keeps green emission performance, and in humid air
Place 2 months, its emission spectrum does not have a significant change, good luminescence property and has high stability.
Brief description of the drawings
Fig. 1, the CsPbBr prepared3Quantum dot syndiotactic polytyrene film is under ultraviolet lighting（a）And without ultraviolet light
According to（b）Photo；Film portion is immersed in the water, under ultraviolet lighting（c）And without ultraviolet lighting（d）Photo；
Fig. 2, CsPbBr3The preparation flow figure of quantum dot syndiotactic polytyrene film；
Fig. 3, the CsPbBr prepared3The emission spectrum of quantum dot syndiotactic polytyrene film.
Embodiment
Below in conjunction with specific embodiment, the present invention will be further described, but the present invention is not limited only to these embodiments.
Embodiment 1
CsPbBr3The specific preparation process of quantum dot syndiotactic polytyrene film
By 1g syndiotactic polytyrenes, 0.007g CsBr, 0.013g PbBr210ml N, N- dimethyl formyls are put into together
In amine solvent, stirred at 60 DEG C, until solute fully dissolves；The solution is dripped on slide, scratched with scraper into thin
Film；Placed 1 hour under 30 DEG C of temperature and 50KPa hypobaric, by film hardening；Film is placed on to 90 DEG C of normal pressure ring
1 hour in border；Finally film is peeled from slide（Flow is as shown in Figure 2）.
The green glow of film emitting bright under ultraviolet lighting, green emission performance is still kept even if being dipped into water（It is such as attached
Shown in Fig. 1）.Spectrum test shows that emission peak is located at 520nm, half-peak breadth 25nm（As shown in Figure 3）.X-ray diffraction analysis table
It is bright：Containing the CsPbBr that size is 2-3 nanometers in film3Quantum dot.Film is immersed in the water 1 hour, lighted unattenuated；By film
Placed under normal temperature and pressure in the environment of humidity 75% week, luminous intensity is without obvious decay.
Comparative example 1
To the CsPbBr encapsulated with acrylic glue3Quantum dot carries out contrast experiment
The first step：With having had disclosed in document, CsPbBr is prepared in toluene3The method of quantum dot, prepares CsPbBr3Quantum
Point；
Second step：By CsPbBr3Quantum dot and acrylic glue mix in toluene, and are scratched with scraper into film, are heating and curing；
The film is immersed in the water a hour, thin-film light emitting performance disappears.By the environment of humidity 75% under the film normal temperature and pressure
One week of middle placement, luminous intensity decay 88%.
Comparative example 2
To the CsPbBr with silica gel packaging3Quantum dot carries out contrast experiment
The first step is identical with comparative example 1；
Second step：By CsPbBr3Quantum dot and silica gel mixing, and scratched with scraper into film, it is heating and curing；
The film is immersed in the water a hour, thin-film light emitting performance disappears.By the environment of humidity 75% under the film normal temperature and pressure
One week of middle placement, luminous intensity decay 91%.
Comparative example 3
To the CsPbBr with epoxy encapsulation3Quantum dot carries out contrast experiment
The first step is identical with comparative example 1；
Second step：By CsPbBr3Quantum dot and epoxy resin mixing, and scratched with scraper into film, it is heating and curing；
The film is immersed in the water a hour, thin-film light emitting performance disappears.By the environment of humidity 75% under the film normal temperature and pressure
One week of middle placement, luminous intensity decay 62%.
Comparative example 4
Use ordinary polystyrene instead
By ordinary polystyrene between 1g（Random polystyrene）, 0.007g CsBr, 0.013g PbBr2It is put into 10ml's together
In DMF solvent, stirred at 60 DEG C, until solute fully dissolves；The solution is dripped on slide, used
Scraper is scratched into film；Placed 1 hour under 30 DEG C of temperature and 50KPa hypobaric, by film hardening；Film is placed on
1 hour in 90 DEG C of atmospheric pressure environment；Finally film is peeled from slide.
Film does not light under ultraviolet lighting.X-ray diffraction analysis show：Do not have CsPbBr in film3Quantum dot.
Contrast above-described embodiment 1 and comparative example 1-4 is understood, using the polymer used in presently disclosed document（Including
Acrylic glue, silica gel, epoxide-resin glue）Quantum dot is packaged, quantum dot in these other polymer is as a result shown in and exists
The inner glow intensity of one week all decays more than 50%, and the film of the present invention is without obvious decay.In addition, by between used in the present invention
Stereospecific polymerized styrene is changed into ordinary polystyrene（Random polystyrene）, then quantum dot is not separated out.
The foregoing is only presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification, it should all belong to the covering scope of the present invention.
Claims (3)
- A kind of 1. CsPbBr3Quantum dot syndiotactic polytyrene laminated film, it is characterised in that：The laminated film is 50-200 μm Thick syndiotactic polytyrene plastic sheeting, wherein it is 2-3nm's to be embedded with without any surfactant molecule, size CsPbBr3Quantum dot.
- 2. one kind prepares CsPbBr as claimed in claim 13The method of quantum dot syndiotactic polytyrene laminated film：Its feature It is：Specifically include following steps：（1）By syndiotactic polytyrene powder, CsBr and PbBr2It is dissolved in together in DMF solvent, fully after dissolving, Resulting solution is coated onto film forming on glass plate；（2）By step（1）In film solidify 1 hour in the environment of 30 DEG C, 50KPa, then transferred in 90 DEG C, atmospheric pressure environment Put 1 hour, finally take off to form CsPbBr3Quantum dot syndiotactic polytyrene film.
- 3. CsPbBr according to claim 23The preparation method of quantum dot syndiotactic polytyrene laminated film, its feature exist In：Step（1）In, the mass ratio of DMF solvent and syndiotactic polytyrene is 10:1；Syndiotactic polytyrene, CsBr and PbBr2Mass ratio be 50:0.35:0.65.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108314077A (en) * | 2018-02-01 | 2018-07-24 | 扬州大学 | The simple method for preparing full-inorganic perovskite nanostructure |
| CN111875895A (en) * | 2020-07-20 | 2020-11-03 | 宁波东旭成新材料科技有限公司 | Preparation method of perovskite quantum dot film |
| CN112322288A (en) * | 2020-10-16 | 2021-02-05 | 厦门华厦学院 | Temperature sensing material and preparation method and application thereof |
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| US20130207073A1 (en) * | 1998-04-01 | 2013-08-15 | Lumileds Lighting Us, Llc | Quantum Dot White and Colored Light Emitting Devices |
| CN104861958A (en) * | 2015-05-14 | 2015-08-26 | 北京理工大学 | Perovskite/polymer composite luminescent material and preparation method thereof |
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| US20130207073A1 (en) * | 1998-04-01 | 2013-08-15 | Lumileds Lighting Us, Llc | Quantum Dot White and Colored Light Emitting Devices |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108314077A (en) * | 2018-02-01 | 2018-07-24 | 扬州大学 | The simple method for preparing full-inorganic perovskite nanostructure |
| CN111875895A (en) * | 2020-07-20 | 2020-11-03 | 宁波东旭成新材料科技有限公司 | Preparation method of perovskite quantum dot film |
| CN112322288A (en) * | 2020-10-16 | 2021-02-05 | 厦门华厦学院 | Temperature sensing material and preparation method and application thereof |
| CN112322288B (en) * | 2020-10-16 | 2023-05-12 | 厦门华厦学院 | Temperature sensing material and preparation method and application thereof |
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